Prolam LVL 15 Design Guide - prolamnz.com … · Prolam LVL preservation treatment standard 20 June 2017 to meet the durability requirements where hazard class H1.2 or less applies

Prolam LVL 15 Design Guide

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2Prolam LVL 15 Design Guide

03 — Scope of Publication

04 — Prolam LVL 15

05 — Design/Effective Span

06 — Continuous Spans

06 — Rip Sawing Prolam LVL 15

06 — Double Section Prolam LVL 15

08 — Steel and Timber Post Fixing

08 — Fire Resistance

09 — Cutting and Notching

10 — Roof Construction Detailing

10 — Lateral Restraint of Roof Beams

11 — Chemical Resistance

11 — Storage and Handling

00 — Marking of Prolam LVL 15

12 — Designing with Prolam LVL 15

12 — Product Specification

12 — Limit State Design Values

13 — Strength Reduction Factor

13 — Duration of Load

13 — Bearing Factor

13 — Load Sharing

13 — Stability

13 — Temperature

13 — Moisture Effects

13 — Size Factor

14 — Joint Group

14 — Section Properties

Span Tables15 — Joists

15 — Normal Domestic

16 — Tiled Domestic

17 — Joists Supporting Par Loadbearing Walls

19 — Bearers

19 — Supporting Joists only 1.5 kPa

21 — Supporting Single/Upper Loadbearing Wall

25 — Supporting Double Loadbearing Wall

29 — Lintel

29 — Single/Upper Loadbearing Wall

32 — Supporting Double Loadbearing Wall

33 — Supporting TG

35 — Ceiling Joists

36 — Ceiling Runner / Hanging Beams

37 — Rafters

41 — Hip Rafters

43 — Ridge or Intermediate Beams

47 — Verandah Beams

51 — Garage Beams

Contents



Scope of this PublicationThis Design Guide and Load Tables assist in the selection of Prolam LVL™ 15 beams for some of the common structural arrangements met in domestic construction in accordance with the principles and intent of NZS 3603:1993 “Timber Structures Standard” and NZS 3604: 2011 “Timber framed buildings”. Loading data is taken from AS/NZS 1170:2002 “Structural design Actions” to satisfy the requirements of section B1 of the New Zealand Building Regulations.

Substitution of Other Products All load tables in this document are designed using SAI Global product certified properties of Prolam LVL 15 as distributed in New Zealand by Prowood. Other manufacturers’ LVL may have different properties and therefore cannot be designed using these span tables.

Roof Mass The roof mass in these tables has been separated into four categories related to the type of roof cladding and whether it supports a ceiling.

Roof Type Mass kg/m2 Typical Description

Light Roof 25Corrugated Metal Desk

Light Roof & Ceiling 40

Heavy Roof 75Tiled Roof

Heavy Roof & Ceiling 90

Wind Loading Except where otherwise noted, the tables given in this Design Guide are suitable for applications in building wind zones up to Extra high (EH) exposure as per NZS 3604: 2011 “Timber framed buildings” table 5.4. Separate table for rafters and verandah beams are given for wind exposure medium (M) wind exposure.

Snow Loading A snow load of 1.0 kPa has been assumed in all tables in this Design Guide. NZS 3604 Section 15 provides modification factors for snow loads up to 2.0 kPa.

Product WarrantyProwood warrants that its SmartFrame Engineered Wood products will be free from manufacturing defects in workmanship and material. In addition, provided the product is correctly installed and used, Smartwoodsolutions warrants the adequacy of its design for the normal and expected life of the structure.

WE’RE PROUDLY NEW ZEALAND OWNED & OPERATED

This warranty is backed by the full resources of Pacific Woodtech Corporation and undewritten by product liability insurance.



Prolam LVL 15

Description Prolam LVL 15 is a Douglas Fir structural laminated veneer lumber (LVL) manufactured by Pacific Woodtech Corporation, Washington State, USA to meet the quality controlled process requirements of AS/NZS 4357 - Structural Laminated Veneer Lumber.

Quality Compliance with process based quality control requirements is third party audited by SAI-Global, and the audits, together with end product testing is used as the basis for Product Certification by SAI-Global as a JAS-ANZ accredited Product Certification body.

JAS-ANZ stands for the government established “Joint Accreditation System of Australia and New Zealand” which exists as the peak organisation for accreditation of Product Certification bodies.

Marking Each piece of Prolam LVL is marked at least once with the Prolam LVL branding compliant with AS/NZS 4357 structural LVL standard for identification and evidence of compliance with manufacturing control standards and product quality certification.

Preservative Treatment Options LVL 15 can be supplied untreated, or treated in accordance with the Prolam LVL preservation treatment standard 20 June 2017 to meet the durability requirements where hazard class H1.2 or less applies.

Benefits of Prolam LVL 15Prolam LVL 15 has a number of advantages over other solid wood- based materials:

Long lengths of Prolam LVL 15 are available; up to 12 metres ex-stock from merchants.

The Prolam LVL 15 strength is optimised by grading and selecting veneer for different parts of the LVL cross section and making a very high strength to weight ratio product. Higher strength can mean a smaller section size is required.

Structural properties of LVL are very uniform because the randomised layers of thin veneers are pre-graded for stiffness (coefficient of variation for modulus of elasticity less than 5%).

LVL members have high strength because of the low variability and randomised wood properties in thin layers.

AS 4357 Lic SMKB25220

SAI Global



Diagram (a) shows beam where bearings have been designed appropriately. The effective span is taken as the distance between the centre of each bearing area.

Diagram (b) shows beam where bearings at each end have been oversized. (This is frequently the case for beams that bear onto brickwork or concrete walls where the thickness of the wall is in excess of the area required to give the beam bearing capacity).

1. Calculate the minimum bearing required to carry the loads satisfactorily 2. Add minimum bearing length to “clear span” distance.

Clear span (distance between face of supports)

Effective span (design span L)

Effective span (design span) L

Clear span (distance between face of supports)

Centre-line span (distance between centres of supports)

Area of support required for bearing

Length of effective bearing

Length of original bearing (oversized)

Prolam LVL 15 Design/Effective SpanNormal structural analysis uses the centreline representation of the member. The term “span” can be defined in a number of ways and these are defined as follows:

Clear Span. This is the distance between the faces of any support. It is generally the one easiest to measure and read from the drawings.

Nominal span/centre-line span. This is the distance between the centre of the supports. This span is used to determine bending moments and deflections for continuous spanning members.

Design span/Effective span. This is the span used for single span members to determine the bending moment, the slenderness of bending members and the deflections. In NZS 3603 this is the dimension referred to as “L”, and is defined below.

Design span/Effective span is the distance between:

• The centre of the bearing at each end of a beam where the bearing lengths have NOT been conservatively sized

• The centre of notional bearing that have been sized appropriately, where the size of the bearing IS conservative.

Prolam LVL 15 continued



Rip Sawing Prolam LVL 15 Double Prolam LVL 15 Section Beams

Continuous SpansFor beams continuous over two (2) unequal spans, the design span and the “Resultant Span Description” depend upon the percentage difference between the two spans as shown below: Note, for continuous spans, the Design Span is taken as the distance between the centre of the supports, as shown in “Design Span” on page 2 of the Design Guide.

One of the unique properties of Prolam LVL 15 is that it may be ripped through the depth to the smaller section sizes as those given in these span tables without affecting the basic strength properties. It is important that the new members are not cut undersized if the maximum spans in these tables are to be used.

Beams of 70, 84 and 116 mm thickness can be formed by nail laminating two sections of Prolam LVL 15 as follows.

The suggested method of vertical lamination below provides a greater level of fixity between individual components, and with the use of an elastomeric adhesive, also prevents moisture penetration between the laminates.

Beam Thickness

(mm)

Individual Section

Thickness (mm)

Nail Ø (mm)

Minimum Nail Length

(mm)

70 35 3.06 75

84 42 3.30 90

116 58 3.30 100

The sawing through the thickness to produce sections of a lesser thickness may decrease the integrity of the Prolam LVL 15 and is therefore NOT recommended under any circumstances.

Effective spanResultant span

descriptionSpan difference %

10% max10 – 30%

above 30%

main span1.1 x main span

main span

continuouscontinuous

single

(main span – 2nd span)

(main span + 2nd span)

SPAN DIFFERENCE x 100

Main span 2nd span




Multiple Member Laminating of Side Loaded Beams (Non-Symmetrical Loading)

Multiple Member Laminating of Top Loaded Beams (Symmetrical Loading)The edges of the individual sections must be carefully aligned to each other so that the composite beam is flat, allowing the applied loads to be equally shared. Depths up to and including 300 mm: 2 rows of nails as shown above at 300 mm centre. Depths in excess of 300 mm: 3 rows of nails as shown above at 300 mm centres.

Temporary waterproof membrane

Bead of elastomeric adhesive

Bead of elastomeric adhesive

300 mm spacing

Nails driven on alternatives ides

D

Recommended “during construction” protection from weather for multiple Prolam LVL 15

Maximum Floor Load Width supported by either Outside Member

Combination 1 2 pieces of

35 or 42 mm

Combination 2 3 pieces of

35 or 42 mm

Combination 3 1 piece of 35 or 42 mm1 piece of 58 or 75 mm

Nail spacing

Bolt spacing50 mm Min

50 mm Min

50 mm Min

50 mm Min

55 mm minimum diameter washer

Stagger row of bolts

Combination(see below)

3.75Ø x 90 mm Nails

2 Rows at 300 Ctrs

3 Rows at 300 Ctrs

2 Rows at 600 Ctrs

2 Rows at 300 Ctrs

Combination 1 3400 5100 7500 15000

Combination 2 2900 4000 5600 11000

Combination 3 2900 4000 5600 11000

Notes: 1. Table values are for 40 kg/m2 floors.2. The table values for nails may be doubled for nails at 150 mm centres, and tripled for nails at 100 mm centres3. The nail schedules shown apply to both sides of a three (3) piece beam4. Bolts are to be grade 4.6 commercial bolts. Bolt holes are to be a maximum of 13 mm diameter and are to be located NOT less than 50 mm from either edge.5. All bolts shall be fitted with a washer at each end, of a size NOT less than that given in AS 1720.1 Table 4.12.




How to use the Maximum Uniform Side Load Table

Steel and Timber Post Fixing to Prolam LVL 15 Fire Resistance

Beam of 2 Prolam LVL loaded on both side (Combination 1)

FLW 1 = 2800 mm, FLW 2 = 2300 mm Total FLW = 2800 + 2300 = 5100 mm

1. Use Prolam LVL safe load tables to size the two member section to support the FLW of 5100 mm.

2. Choose the larger of the side FLW’s carried by the beam, in this case 2800 mm.

3. Enter the table at the “Combination 1” row and scan across to a table value greater than 2800 mm. The first value in the row at 3600 mm is greater than the 2800 mm required, thus adopt 2 rows of 3.75Ø x 90 mm nails at 300 mm centres.

Floor load width 1

= 2800 mm

Floor load width 2

= 2300 mm

Columncap to provide required bearing length

“BL”and fully support all plys of beam

Beam to be laterally restrained to prevent it twisting or rotating at the support

Post cap to provide required bearing length “BL” and fully support all plys of beam

The method of calculating the fire resistance of LVL is described in Section 9 of NZS 3603.

Clause 9.4.2 NZS 3603 specifies the charring rate of softwood timber with a density similar to Douglas Fir as 0.65 mm per minute.

An alternative solution may be obtained by the method defined within AS 1720.4—2006.

Where:c = notional charring rate, in mm per minute∂ = timber density of Prolam LVL 15 – 600 kg/m3

BL

c = 0.4 +280

∂




Cutting and Notching Prolam LVL 15 Beams, Bearers, Rafters and Joists

D/4 max

D/2 or 100 mm max

D/2 or 100 mm max

100 mm max

D 200 mm or greater

D less than 200 mm

D3D max

D/8 or 25mm max

50 dia200 mm

D min

50 mm min

Note: Not more than 3 holes per 1800 mm of span



Rafter Cut

D/8 or 25 mm max

D/4 max

D/2max

D/8 or 25 mm

max

60 min

D

D

D/4 max

D/3 max

100 mmmax

B/4max

D/3max

D/3 min

D/4max

D less than 200 mm

D

B

68 min

D/2max

D

Notch may be over support

Notch may be over support

D/8 or 25mm max

D/3 min



Lateral Restraint of Hanging, Counter, Strutting, Strutting/Hanging Beams and Strutting/Counter Beams

Rafter

Rafter cut NOT less than 1:3

Not less than D/3 or 100 mm

Rafters are NOT to be skew nailed to the underpurlin with the nails parallel to the direction of the veneers

Rafter

Nail fixing to AS 1684, skewed through rafter into underpurlin ACROSS the plane of the veneers

Underpurlin

Rafter Cut Detail May be used for Counter, Hanging and Strutting Beams Rafter Underpurlin Fixing

Vertical Prolam LVL 15 Roof Struts

Prolam LVL 15 underpurlin

Prolam LVL 15 vertical strut

DO NOT cut the birdsmouth in the direction of the Prolam LVL 15 veneers

Prolam LVL 15 underpurlin

(a) Block skew nailed to beam and to support with 3/75 mm skew nails to each member

(b) Min 35 x 32 mm tie nailed to top of beam and to support with 2/75 mm nails at each end

(c) Galvanised strap nailed to support and top of beam with 2/30 x 2.8 mm nails each end to beam

Notes: 1. Method used depends upon whether ceiling joists are perpendicular or parallel to the beam.2. Methods given in (b) and (c) are particularly suitable for restraining strutting beams and strutting/hanging beams at the intermediate points where the beams are supported, as they also permit these beams to be supported up clear of the ceiling joists by packing under at their supports.

Rafter

Underpurlin

Fan struts

Strutting beam

Underpurlin

Fan struts

Strutting beam

Brace min 35x35 with 2/75 mm nails each end

Example Intermediate Lateral Restraints


Roof Construction Detailing



Storage and Handling of Prolam LVL 15

Chemical ResistanceProlam LVL 15 (wood in general) has a definite advantage over steel members when exposed to corrosive environments. Timber and wood products are able to withstand mild acid conditions and are more resistant to degradation.

The behaviour of Prolam LVL 15 in chemical environments depends upon a number of factors, including PH and temperature. Wood essentially responds by either swelling (Category S), similar to moisture response, or by chemical degradation (Category D). Damage due to swelling is essentially reversible, but chemical degradation results in breakdown of the wood structure and is non-reversible. Category S agents include alcohol and other polar agents. These agents swell dry wood causing a strength (and stiffness) loss proportional to the swelling.

Category D agents include acids, alkalis and salts and result in a loss of strength and stiffness directly related to the loss of member cross-section. The table below provides a rough guide to performance of Prolam LVL 15 in chemical environments.

The effect of chemicals on wood will generally be worsened by increased exposure time, temperature, extremes of pH and chemical concentration. Wood generally offers considerably less resistance to alkalis than acids. Softwoods (includes Prolam LVL 15) generally have better resistance to acids than hardwoods.

Where there is the possibility of chemical attack on Prolam LVL 15 members, designers should seek expert advice.

Agent Category Chemical Agent Mode of Attack Damage – Reversible or Permanent

Severity – (loss of strength and/or stiffness)

Neutral Non-polar liquids such as petroleum hydrocarbons None Negligible Negligible

5 (Swelling) Alcohol and other polar solvents Swelling Reversible Proportional to

volumetric swelling

D (Degrading) Inorganic acids Hydrolysis or cellulose Permanent Slight to moderate

DOrganic acids such as:

Formic, acetic, propionic and lactic acid

Hydrolysis or cellulose Permanent Slight (pH 3-6)

DAlkalis such as:

sodium, calcium and magnesium hydroxide

De-lignification of wood and dissolving of

hemicellulosePermanent Moderate (pH > 9.5)

Severe (pH > 11)

D Salts (considered as weak acids) Hydrolysis of cellulose Permanent Slight

Table reference Williamson T. G 2002 APA Engineered Wood Handbook

Use bearers to keep stacked material away from damp surfaces. Align bearer vertically.

Bearers at a maximum of 4000 mm centres

• Store Prolam LVL 15 flat on a hard, dry surface• If surface isn’t paved, the ground should be covered with a polythene film• Keep covered with waterproof material that allows bundles to “breathe”• Use bearers (bolsters) between the ground and the first bundle (4 metre max spacing)• Use 100 x 50 timber flat between bundles at same spacing as bolsters• Take great care to rewrap remaining material after opening bundles• LVL “grows” in thickness and depth when allowed to get wet.... KEEP DRY!• LVL with high MC has short term reduction in Characteristic Strengths …. KEEP DRY!• Under NO circumstances is stored Prospan SmartLVL to be in contact with the ground.




Designing with Prolam LVL 15The design information contained within this Design Guide is for the SAI Global product certified properties of Prolam LVL 15 only. Other manufacturers’ LVL may have different properties and therefore cannot be designed using this information.

Veneer

Thickness: 2.5 – 3.2 mm

Species: Douglas Fir (Pseudotsauga menziesii)

Grade: CD (Metriguard graded)

Joints: Face scarf and overlap

Length: +/- 10 mm

Dimensional Tolerances

Depth:< 200 mm +/- 1 mm

> 201 mm +/- 2 mm

Thickness: -0, +4 mm at 12% moisture content

Adhesive Phenol Formaldehyde (Type “A”, AS 2754.1)

Formaldehyde Emission Class E0 (Table 1 AS/NZS 4357)

Forestry Stewardship Certified chain of custody system to PEFC

Timber Strength Properties 1

Bending – Edge f1b 59 MPa

Bending – Flat f1b 59 MPa

Tension Parallel to Grain f1t 35 MPa

Tension Perpendicular to Grain f1tp 0.5 MPa

Compression Parallel to Grain f1c 39 MPa

Compression Perpendicular to Grain – Edge f1p 12 MPa

Compression Perpendicular to Grain – Flat f1p 7.8 MPa

Shear – Edge (rail shear to AS/NZS 4357) (3 point bending to AS/NZS 4063)

f1s

4.2 MPa 5.0 Mpa

Shear – Flat (rail shear to AS/NZS 4357) (3 point bending to AS/NZS 4063)

f1s

3.0 MPa 2.4 Mpa

Average Elastic Modulus E 15,000 MPa

Average Modulus of Rigidity G 775 MPa

Average Density ∂ 600 kg/m3

Moisture Content 12-15%

(1) Dry conditions

Product Specifications

Limit State Design Characteristics Properties



Designing with Prolam LVL 15 continued

The strength reduction factor for calculating the design capacities of structural members shall be taken from the table below, refer- enced from AS 1720.1 –2010.

Application of Prolam LVL 15 as a Structural Member

Category 1

Structural members for houses for which failure

would be unlikely to affect an area greater than 25 m2;

ORsecondary members

Category 2

Primary structural members in structures other than houses;

ORelements in houses for which

failure would be likely to affect an area* greater than 25 m2

Category 3

Primary structural members in structures intended to fulfil essential services or

post disaster function

Strength Reduction Factor Ø*

0.95 0.90 0.80

*AS 1720.1:2010 Table 2.1

Strength Reduction Factor

Duration of Load FactorThe duration of load factor k1 for strength is defined within clause2.7 and Table 2.4 of NZS 3603:1993. The duration of load factor k2 for deflection is defined within clause 2.7 and Table 2.5 of NZS 3603:1993.

Bearing FactorThe bearing area factor k3 is defined within clause 2.8 and Table 2.6 of NZS 3603:1993

Load SharingBecause of the reduced variability of strength values of LVL compared to solid timber , the load sharing factors k4 and k5 within clause 2.9 of NZS 3603:1993 do not apply and therefore k4 and k5 = 1.0. k6 is a factor relating specifically to Glulam and thus for LVL assumes a value of 1.0

StabilityThe stability factor k8 is defined within clause 2.10 and Table 2.8 of NZS 3603:1993 for dry timber. Appendix C of NZS 3603 provides alternative solutions for the determination of the slenderness coefficient S for beams.

TemperatureNZS 3603:1993 Clause C.11 states “Under normal conditions in New Zealand, no modification of the characteristic stresses need to be made for the effects of temperature”.

Moisture EffectsWhen used in dry conditions where the moisture content remains below 15%, no modification for moisture content is required. (for definition of dry locations, see NZS 3603:1993 clause C6.3.3).

Size FactorThe characteristic values in bending and tension for wood products is affected by a size factor. For Prolam LVL 15, multiply the published characteristic strength and tension values by the size factors shown in the table below.

Bending

Beam Orientation Depth of Section Strength Adjustment

Edge< 90 mm Nil

> 90 mm (90/d)0.197

Flat > 45 mm (45/t)0.333

Tension

Largest Cross Section Dimension

Strength Adjustment

< 150 mm Nil

> 150 mm (150/d)0.167

Where:d = depth of member on edget = thickness of member



Designing with Prolam LVL 15 continued

Joint GroupThe joint group for Prospan SmartLVL 15 in the table below has been calculated using AS 1649 - Timber - Methods of test for mechanical fasteners and connectors modified as per Appendix A of NZS 3603:1993.

Nails in Lateral Load

Screws in Lateral Load

Nails and Screws in Withdrawal

Bolts and Coach Screws in Lateral Load Driven into Face

Edge Face Perpendicular to Grain

Parallel to Grain

J4 J4 J2 J2 J4 J3

Prolam LVL 15 Section Sizes and Properties

Nominal Size DxB (mm)

Beam Mass (kg/m)

Nominal Section Area

103 mm2

Major Axis Minor Axis

ZXX IXX EIXX ZYY IYY

103 mm2 106 mm4 109 Nmm2 103 mm2 106 mm4

90 x 42 2.3 3.8 57 3 40 26.5 0.6

120 x 42 3 5 101 6 94 35.3 0.7

140 x 42 3.5 5.9 137 10 149 41.2 0.9

190 x 42 4.8 8 253 24 372 55.9 1.2

240 x 42 6 10.1 403 48 750 70.6 1.5

290 x 42 7.3 12.2 589 85 1323 85.3 1.8



Joint Spacing (mm) 300 400 450 600 300 400 450 600

Member Size DxB (mm) Recommended Single Span (mm) Recommended Continuous Span (mm)

90 x 42 1850 1650 1600 1500 2300 1950 1850 1700

120 x 42 2650 2250 2150 2050 3600 2700 2550 2350

140 x 42 3250 2700 2600 2400 4200 3250 3050 2800

190 x 42 4750 3850 3650 3350 5700 4750 4350 3900

240 x 42 5650 5050 4750 4300 6750 6300 5800 5050

290 x 42 6450 6050 5900 5300 7800 7250 7050 6200

Floor Joists Supporting Domestic Floor Loads Only

BearerFloor joist supporting floor loads only

Joist span

Joist spacing

Floor mass – 40 kg/m2

Joist spacing < 600 mm

Loadings: Permanent – self weight + 40 kg/m2 + 0.6 kPa of the live load, live load = 1.5 kPa or floor point load = 1.8 kN

Design Deflection Limits

D.L Minimum of span/300 or 12.5 mm

L.L Minimum of span/360 or 9.0 mm

Floor Dynamics Minimum natural frequency – 8 Hertz Maximum differential deflection between joists of 1.5 mm under a concentrated load of 1.0 kN mid-span

Notes:1. Spans are suitable for solid timber, particle board and ply flooring. Floor sheeting glued and nailed to joists will improve floor rigidity. Where heavy overlay material is to be applied, such as a mortar bed tiled or slate floor, the permanent load allowance should be increased to 1.0 kPa.2. For beams which are continuous over two unequal spans, the design span and the ‘resultant span description’ depend upon the percentage span differences between the two spans as shown on page 2.3. D = member depth, B = member breadth, NS = not suitable.4. End bearing lengths = 42 mm at end supports and 58 mm at internal supports for continuous members.5. Not all sizes of Prolam LVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering.



Floor Joists Supporting Domestic Tiled Floors

BearerFloor joist supporting floor loads only

Joist span

Joist spacing







Floor Dynamics Minimum natural frequency – 8 Hertz Maximum differential deflection between joists of 1.5 mm under a concentrated load of 1.0 kN mid-span

Notes:1. For beams which are continuous over two unequal spans, the design span and the ‘resultant span description’ depend upon the percentage span differences between the two spans as shown on page 2.2. D = member depth, B = member breadth, NS = not suitable.3. End bearing lengths = 42 mm at end supports and 58 mm at internal supports for continuous members.4. Not all sizes of Prolam LVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering

Joint Spacing (mm) 300 400 450 600 300 400 450 600

Member Size DxB (mm) Recommended Single Span (mm) Recommended Continuous Span (mm)

90 x 42 1850 1650 1600 1500 2300 1950 1850 1700

120 x 42 2650 2250 2150 2050 3600 2700 2550 2350

140 x 42 3250 2700 2600 2400 4200 3250 3050 2800

190 x 42 4300 3850 3650 3350 5300 4750 4350 3900

240 x 42 5100 4750 4650 4300 6300 5850 5700 5050

290 x 42 5850 5500 5350 5000 7250 6750 6550 6100



Roof Load Width 1800 3000 4200 5400 6600 1800 3000 4200 5400 6600

Member Size DxB (mm) Light Roof with Ceiling (40 kg/m2) Heavy Roof with Ceiling (90 kg/m2)

2 / 90 x 42 1650 1550 1400 1300 1200 2000 1800 1700 1600 1500

2 / 120 x 42 2200 2050 1850 1750 1650 2700 2450 2250 2100 2000

2 / 140 x 42 2550 2400 2150 2000 1900 3100 2850 2650 2450 2350

2 / 190 x 42 3450 3250 2950 2750 2600 4100 3800 3550 3350 3200

2 / 240 x 42 4200 3850 3600 3400 3250 4850 4550 4300 41005 395020

2 / 290 x 42 4850 4450 4150 3950 3750 5600 5200 495010 470020 455035

Single Span Floor Joists Supporting Parallel Load Bearing Walls

Roof Load Width

Joist span

Joist spacing



Loadings: Permanent – self weight + 40 kg/m2 + 0.6 kPa of the live load, live load = 1.5 kPa or floor point load = 1.8 kN, light roof and ceiling = 40 kg/m2, heavy roof and ceiling = 90 kg/m2, lightweight wall mass = 30 kg/m2, snow load = 1.0 kPa, wall height = 3000 mm.






Roof Load Width 1800 3000 4200 5400 6600 1800 3000 4200 5400 6600

Member Size DxB (mm) Light Roof with Ceiling (40 kg/m2) Heavy Roof with Ceiling (90 kg/m2)

2 / 90 x 42 2250 2100 2000 1900 1800 1450 1350 1250 1150 1100

2 / 120 x 42 3000 2800 2650 2550 2450 1950 1800 1650 1550 1450

2 / 140 x 42 3500 3250 3100 2950 2850 2300 2100 1950 1800 1700

2 / 190 x 42 4450 4250 4100 3950 3800 3100 2800 2600 2450 2350

2 / 240 x 42 5300 5050 4850 4700 4550 3850 3550 3300 3100 2950

2 / 290 x 42 6050 5800 5600 5400 5250 4450 4150 3950 3750 35505

Continuous Span Floor Joists Supporting Parallel Load Bearing WallsFloor mass – 40 kg/m2

Joist spacing < 600 mmLoadings: Permanent – self weight + 40 kg/m2 + 0.6 kPa of the live load, live load = 1.5 kPa or floor point load = 1.8 kN, light roof and ceiling = 40 kg/m2, heavy roof and ceiling = 90 kg/m2, lightweight wall mass = 30 kg/m2, snow load = 1.0 kPa, wall height = 3000 mm.

Notes:1. For beams which are continuous over two unequal spans, the design span and the ‘resultant span description’ depend upon the percentage span differences between the two spans as shown on page 2.2. D = member depth, B = member breadth, NS = not suitable.3. End bearing lengths = 42 mm at end supports and 58 mm at internal supports for continuous members. Subscript values indicate the minimum additional bearing length where required to be greater than 42 mm at ends and 58 mm at internal supports.4. Not all sizes of Prolam LVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering.



Floor Load Width (mm) 1200 1800 2400 3000 3600 4200 4800 5400 6000

Member Size DxB (mm) Maximum Allowable Single Span (mm)

2 / 90 x 42 2000 1750 1550 1450 1350 1300 1200 1150 1100

2 / 120 x 42 2650 2300 2100 1950 1800 1700 1650 1550 1500

2 / 140 x 42 3100 2700 2450 2250 2100 2000 1900 1850 1750

2 / 190 x 42 4000 3650 3300 3050 2900 2700 2600 2500 2400

2 / 240 x 42 4750 4300 4000 3800 3600 3450 3300 3150 3000

2 / 290 x 42 5450 4950 4600 4350 4150 4000 3850 3750 3650

Single Span Floor Bearers Supporting Floor Loads Only

Bearer supporting joist loads only

Floor joist supporting floor loads only

Floor load widthBearer span








Continuous Span Floor Bearers Supporting Floor Loads OnlyFloor mass – 40 kg/m2

Joist spacing < 600 mmLoadings: Permanent – self weight + 40 kg/m2 + 0.6 kPa of the live load, live load = 1.5 kPa or floor point load = 1.8 kN.

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. The above table was based on a maximum floor dead load of 40 kg/m2 + 0.6 kPa of LL, floor live load of 1.5 kPa & floor point load of 1.8 kN3. End bearing lengths = 42 mm at end supports and 58 mm at internal supports for continuous members. Subscript values indicate the minimum additional bearing length where required to be greater than 42 mm at end supports and 58 mm at internal supports.4. Restraint value for slenderness calculations is 600 mm (floor joist centres at 600 mm max).5. Not all sizes of Prolam LVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering.6. For beams which are continuous over two unequal spans, the design span and the ‘resultant span description’ depend upon the percentage span differences between the two spans as shown on page 2.

Floor Load Width (mm) 1200 1800 2400 3000 3600 4200 4800 5400 6000

Member Size DxB (mm) Maximum Allowable Continuous Span (mm)

2 / 90 x 42 2700 2350 2150 2000 1850 1750 1650 1600 1550

2 / 120 x 42 3400 3050 2850 2650 2450 2350 2250 2150 2050

2 / 140 x 42 3800 3450 3200 3000 2900 2750 2600 2500 2400

2 / 190 x 42 4750 4300 4000 3800 3650 3500 34005 330015 320025

2 / 240 x 42 5700 5150 4800 4500 43005 415015 400025 390035 380045

2 / 290 x 42 6550 5900 5500 52005 500015 480030 465040 450050 440065



Floor Load Width (mm) 1200 2400 3600

Roof Load Width (mm) 1800 3000 4200 5400 6600 1800 3000 4200 5400 6600 1800 3000 4200 5400 6600


2 / 90 x 42 1500 1450 1350 1250 1200 1350 1300 1250 1150 1100 1200 1200 1150 1100 1050

2 / 120 x 42 2000 1900 1800 1650 1600 1800 1700 1650 1550 1500 1600 1600 1550 1500 1400

2 / 140 x 42 2350 2250 2100 1950 1850 2100 2000 1900 1800 1750 1900 1850 1800 1750 1650

2 / 190 x 42 3200 3050 2800 2650 2500 2850 2750 2600 2500 2350 2600 2500 2450 2350 2250

2 / 240 x 42 3950 3700 3500 3300 3150 3550 3450 3300 3150 3000 3250 3150 3100 3000 2850

2 / 290 x 42 4550 4250 4000 3800 3650 4150 3950 3800 3650 35005 3900 3750 3600 35005 340010

Single Span Floor Bearers Supporting Single Storey Load Bearing Wall – Light Roof and Ceiling

Roof load width

Load bearing

wall

Bearer span

Floor load width

Bearer

Single or upper storey bearer





Roof mass – 40 kg/m2

Loadings: Permanent – self weight + 40 kg/m2 + 0.6 kPa of the live load, live load = 1.5 kPa or floor point load = 1.8 kN, light roof and ceiling = 40 kg/m2, heavy roof and ceiling = 90 kg/m2, lightweight wall mass = 30 kg/m2, snow load = 1.0 kPa, wall height = 3000 mm.






2 / 90 x 42 2050 1950 1850 1800 1750 1650 1650 1650 1600 1600 1450 1450 1400 1400 1400

2 / 120 x 42 2750 2600 2500 2400 2350 2400 2350 2250 2200 2150 2050 2050 2000 2000 2000

2 / 140 x 42 3200 3050 2900 2800 2700 2850 2750 2650 2550 2500 2500 2450 2450 2400 2350

2 / 190 x 42 4200 4050 3900 3800 3700 3800 3700 3600 3500 3400 3450 3400 3300 3250 3150

2 / 240 x 42 5000 4800 4650 4500 4400 4550 4400 4300 4200 41505 4200 41505 405010 400015 395020

2 / 290 x 42 5700 5500 5350 5200 5050 5200 5100 49505 485010 475020 485015 480020 470025 460030 455035

Continuous Span Floor Bearers Supporting Single Storey Load Bearing Wall – Light Roof and CeilingFloor mass – 40 kg/m2


Notes:1. D = member depth, B = member breadth, NS = not suitable.2. The above table was based on total ground floor mass of 40 kg/m2 + 0.6 kPa of LL, floor live load of 1.5 kPa, floor point load of 1.8 kN, light roof & ceiling weight of 40kg/m2, lightweight wall of 30 kg/m2 & ground snow load of 1kPa.3. The above table was based on a wall height of 3000 mm.4. End bearing lengths = 42 mm at end supports and 58 mm at internal supports for continuous members. Subscript values indicate the minimum additional bearing length where required to be greater than 42 mm at end supports and 58 mm at internal supports.5. Restraint value for slenderness calculations is 600 mm.6. Not all sizes of Prolam LVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering.7. For beams which are continuous over two unequal spans, the design span and the ‘resultant span description’ depend upon the percentage span differences between the two spans as shown on page 2.






2 / 90 x 42 1400 1250 1200 1100 1050 1250 1150 1100 1050 1000 1150 1100 1050 1000 NS

2 / 120 x 42 1850 1700 1600 1500 1450 1650 1550 1500 1400 1350 1550 1450 1400 1350 1300

2 / 140 x 42 2150 2000 1850 1750 1650 1950 1850 1750 1650 1600 1800 1700 1650 1550 1500

2 / 190 x 42 2950 2700 2550 2400 2300 2650 2500 2350 2250 2150 2450 2350 2250 2150 2050

2 / 240 x 42 3700 3400 3200 3000 2900 3350 3150 3000 2850 2750 3100 2950 2800 2700 26005

2 / 290 x 42 4250 4000 3800 3650 34505 3950 3800 3600 34505 330010 3750 3550 34005 325010 315015

Single Span Floor Bearers Supporting Single Storey Load Bearing Wall – Heavy Roof and CeilingFloor mass – 40 kg/m2


Loadings: Permanent - self weight + 40 kg/m2 + 0.6 kPa of the live load, floor live load = 1.5 kPa or floor point load = 1.8 kN, heavy roof and ceiling = 90 kg/m2, lightweight wall mass = 30 kg/m2, snow load = 1.0 kPa & wall height = 3000mm.






2 / 90 x 42 1900 1750 1600 1550 1450 1650 1600 1500 1450 1400 1450 1450 1400 1350 1300

2 / 120 x 42 2500 2300 2150 2050 1950 2300 2150 2050 1950 1850 2050 2000 1900 1850 1750

2 / 140 x 42 2950 2700 2550 2400 2300 2650 2500 2350 2250 2150 2450 2350 2250 2150 2050

2 / 190 x 42 3900 3650 3450 3250 31005 3600 3400 3200 30505 295010 3350 3150 30505 290015 280020

2 / 240 x 42 4650 4400 41505 400015 385025 4350 41505 395015 385025 370035 410010 395020 380030 370040 355045

2 / 290 x 42 5350 50505 480015 460030 445040 50005 475020 455030 440040 430055 470025 450035 440045 425055 415070

Continuous Span Floor Bearers Supporting Single Storey Load Bearing Wall – Heavy Roof and CeilingFloor mass – 40 kg/m2


Notes:1. D = member depth, B = member breadth, NS = not suitable.2. The above table was based on total ground floor mass of 40 kg/m2 + 0.6 kPa of LL, floor live load of 1.5 kPa, floor point load

of 1.8 kN, heavy roof & ceiling weight of 90kg/m2, lightweight wall of 30 kg/m2 & ground snow load of 1kPa.3. The above table was based on a wall height of 3000 mm4. End bearing lengths = 42 mm at end supports and 58 mm at internal supports for continuous members. Subscript values indicate

the minimum additional bearing length where required to be greater than 42 mm at end supports and 58 mm at internal supports.5. Restraint value for slenderness calculations is 600 mm6. Not all sizes of Prospan SmartLVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering7. For beams which are continuous over two unequal spans, the design span and the ‘resultant span description’

depend upon the percentage span differences between the two spans as shown on page 2



Roof load width

Upper floor joists

Top plate

Load bearing wall

Bearer spanLower floor load width

Upper floor load width




Upper floor mass – 40 kg/m2

Lower roof mass – 40 kg/m2

Roof mass – 90kg/m2

Lower Floor Load Width (mm) 1800 3600

Upper Floor Load Width (mm) 1800 3600 1800 3600

Roof Load Width (mm) 1800 4200 6600 1800 4200 6600 1800 4200 6600 1800 4200 6600


2 / 90 x 42 1250 1150 1100 1100 1050 1000 1150 1100 1050 1050 1000 1000

2 / 120 x 42 1650 1550 1500 1500 1400 1350 1550 1500 1450 1400 1350 1350

2 / 140 x 42 1950 1850 1750 1750 1650 1600 1850 1750 1650 1650 1600 1550

2 / 190 x 42 2650 2500 2350 2350 2250 2200 2500 2350 2300 2250 2200 2100

2 / 240 x 42 3300 3150 3000 3000 2850 27505 3150 3000 29005 2850 2750 265010

2 / 290 x 42 3900 3750 360010 3600 34505 335010 3750 360010 345015 34505 335010 320020

Single Span Floor Bearer Supporting Double Storey Load Bearing Wall – Light Roof and Ceiling

Loadings: Permanent - self weight + 40 kg/m2 + 0.6 kPa of the live load, live load = 1.5 kPa or floor point load = 1.8 kN, light roof and ceiling = 40 kg/m2, lightweight wall mass = 30 kg/m2, snow load = 1.0 kPa & wall height = 6000mm.







2 / 90 x 42 1700 1600 1500 1500 1450 1350 1600 1500 1300 1450 1400 1200

2 / 120 x 42 2250 2150 1950 2000 1950 1800 2150 1950 1700 1950 1850 1600

2 / 140 x 42 2650 2500 22005 2350 2250 210010 2500 22505 200010 2250 215010 185015

2 / 190 x 42 3550 330020 290035 32005 310030 275040 330020 300030 270045 305030 280035 250045

2 / 240 x 42 425010 410045 360060 395025 380050 340070 410045 370060 330075 375055 345065 315080

2 / 290 x 42 490025 470060 435090 450040 440075 4100100 470060 435085 3950105 440080 410095 3750110




Continuous Span Floor Bearer Supporting Double Storey Load Bearing Wall – Light Roof with Ceiling

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. The above table was based on total upper floor mass of 40 kg/m2, lower floor mass of 40 kg/m2, floor live load of 1.5 kPa, floor point load

of 1.8 kN, light roof and ceiling mass of 40kg/m2, wall mass of 30 kg/m2, permanent floor live load of 0.6 kPa & snow load of 1.0 kPa3. The above table was based on a wall height of 6000 mm.4. End bearing lengths = 42 mm at end supports and 58 mm at internal supports for continuous members. Subscript values indicate

the minimum additional bearing length where required to be greater than 42 mm at end supports and 58 mm at internal supports.5. Not all sizes of Prospan SmartLVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering6. For beams which are continuous over two unequal spans, the design span and the ‘resultant span description’ depend upon the

percentage span differences between the two spans as shown on page 2.







2 / 90 x 42 1150 1050 NS 1050 NS NS 1100 1000 NS 1000 NS NS

2 / 120 x 42 1550 1400 1300 1450 1300 1250 1500 1350 1250 1350 1300 1200

2 / 140 x 42 1850 1650 1550 1650 1550 1450 1750 1600 1500 1600 1500 1400

2 / 190 x 42 2500 2250 2100 2250 2100 1950 2400 2200 2050 2200 2050 1900

2 / 240 x 42 3150 2850 26505 2850 2650 25005 3000 2750 255010 2750 26005 245010

2 / 290 x 42 3750 34505 320010 3450 32005 300015 3600 330010 310020 33505 310010 295020




Single Span Floor Bearer Supporting Double Storey Load Bearing Wall – Heavy Roof and Ceiling

Loadings: Permanent - self weight + 40 kg/m2 + 0.6 kPa of the live load, live load = 1.5 kPa or floor point load = 1.8 kN, heavy roof and ceiling = 90 kg/m2, lightweight wall mass = 30 kg/m2, snow load = 1.0 kPa & wall height = 6000mm.






Continuous Span Floor Bearer Supporting Double Storey Load Bearing Wall – Heavy Roof and Ceiling





2 / 90 x 42 1600 1450 1300 1450 1350 1200 1550 1400 1150 1400 1300 1100

2 / 120 x 42 2150 1950 1700 1950 1800 1600 2050 1850 1550 1850 1700 14505

2 / 140 x 42 2500 2250 200010 2250 21005 185015 2400 215010 180015 22005 200015 165015

2 / 190 x 42 3400 305025 270045 310010 285030 250045 320025 280035 240045 295030 265045 225050

2 / 240 x 42 410020 380050 330075 380030 360060 315080 395045 345065 300080 365060 330075 285085

2 / 290 x 42 470030 440075 3950105 440045 415085 3750110 455065 410095 3650115 430085 3900105 3400120

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. The above table was based on total upper floor mass of 40 kg/m2, lower floor mass of 40 kg/m2, floor live load of 1.5 kPa, floor point load

of 1.8 kN, heavy roof and ceiling mass of 90kg/m2, wall mass of 30 kg/m2, permanent floor live load of 0.6 kPa & snow load of 1.0 kPa3. The above table was based on a wall height of 6000 mm.4. End bearing lengths = 42mm at end supports and 58 mm at internal supports for continuous members. Subscript values indicate the

minimum additional bearing length where required to be greater than 42 mm at end supports and 58 mm at internal supports.5. Not all sizes of Prospan SmartLVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering6. For beams which are continuous over two unequal spans, the design span and the ‘resultant span description’ depend upon the

percentage span differences between the two spans as shown on page 2




Lintels in Single/Upper Storey Walls Light Roof and Ceiling – All Wind Speeds

Upper Floor Load Width (mm) 1800 3000 4200 5400 6600



90 x 42 1550 1450 1300 1350 1200 1100 1200 1050 NS 1100 NS NS 1050 NS NS

120 x 42 2050 2150 2050 1800 1850 1700 1650 1650 1500 1500 1500 1350 1450 1200 1100

140 x 42 2500 2450 2550 2100 2150 2150 1900 1950 1900 1750 18005 1700 1650 1650 140010

190 x 42 3450 3450 3400 2950 2900 2950 2650 2600 27005 24505 24505 245015 23005 230010 225025

240 x 42 4200 4200 4150 3700 3700 3700 34005 33505 33505 31005 310020 310015 290020 290015 290030

290 x 42 4850 4800 4800 4300 4300 43005 39505 395015 395010 370020 370025 370020 350030 350040 345030

2 / 90 x 42 1950 2050 1850 1700 1750 1550 1550 1550 1350 1450 1400 1200 1350 1250 1100

2 / 120 x 42 2700 2650 2800 2300 2300 2350 2100 2100 2100 1900 2000 1900 1800 1850 1750

2 / 140 x 42 3150 3150 3150 2750 2700 2800 2450 2450 2500 2250 2250 2300 2150 2150 2100

2 / 190 x 42 4150 4200 4150 3700 3700 3700 3350 3350 3350 3100 3100 3100 2900 2850 2900

2 / 240 x 42 5000 5000 5000 4450 4450 4450 4100 4100 4050 3850 3850 3800 3650 36505 3600

2 / 290 x 42 5800 5800 5750 5150 5100 5150 4700 4700 4700 4400 4400 4400 42005 42005 420010




Loadings: Light roof and ceiling = 35 kg/m2, snow load = 1.0 kPa

Roof load width ‘RLW’

Lintel spanNormal studs

Normal studs

Rafter/truss spacing

Single/Upper Storey Lintel




Lintels in Single/Upper Storey Walls Heavy Roof and Ceiling – All Wind Speeds

Upper Floor Load Width (mm) 1800 3000 4200 5400 6600



90 x 42 1550 1450 1300 1350 1200 1100 1150 1050 NS 1050 NS NS 100 NS NS

120 x 42 2050 2100 2050 1700 1750 1650 1550 1550 1400 1450 1200 1100 1350 1200 NS

140 x 42 2400 2400 2450 2000 2050 2050 1800 1800 1800 1650 165010 140010 15505 12505 1250

190 x 42 3250 3250 3200 2750 2700 2800 24505 2450 250010 22505 225010 225025 215020 215025 170015

240 x 42 3950 4000 3950 3500 3450 3450 31005 310015 310010 285020 285015 290030 270025 265020 275035

290 x 42 4550 4550 4550 405010 405010 400015 370020 370030 370015 350030 345025 340025 325025 325045 320040

2 / 90 x 42 1900 2000 1850 1600 1650 1600 1450 1450 1300 1350 1300 1150 1300 1200 1050

2 / 120 x 42 2600 2550 2650 2200 2200 2200 1950 2000 1950 1800 1800 1750 1650 1650 1600

2 / 140 x 42 3000 3000 3000 2550 2500 2600 2250 2250 2300 2100 2100 2100 1950 2000 1950

2 / 190 x 42 3950 3950 3900 3450 3450 3400 3100 3100 3100 2850 2800 2850 2700 2650 27005

2 / 240 x 42 4650 4650 4650 4150 4150 4150 3850 3850 3800 3600 36005 3550 34005 33505 33505

2 / 290 x 42 5350 5350 5350 4750 4750 4750 4400 4400 4400 41505 41505 415010 395010 395010 390010

Loadings: Heavy roof and ceiling = 75 kg/m2, snow load = 1.0 kPa

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. Lightweight roof 35 kg/m2, heavy roof 75 kg/m2, snow loads 1.0 kPa3. Minimum bearing length = 35 mm at end supports. Subscript values indicate the minimum additional bearing length where required to be greater than 35 mm.4. Restraint value for slenderness calculations is 600 mm.




Floor mass – 40kg/m2

Lintels in Single/Upper Storey Walls Light Roof and Ceiling – All Wind Speeds

Roof Load Width (mm) 1800 3000 4200 5400 6600

Floor Load Width (mm) 1800 2700 3600 1800 2700 3600 1800 2700 3600 1800 2700 3600 1800 2700 3600


90 x 42 1050 NS NS 1050 NS NS 1000 NS NS NS NS NS NS NS NS

120 x 42 1400 1300 1250 1350 1300 1200 1350 1250 1200 1300 1250 1150 1250 1200 1150

140 x 42 1650 1550 1450 1600 1500 1400 1550 1450 1400 1500 1450 1350 1500 1400 1350

190 x 42 2250 2100 195010 2200 20505 195010 2150 20005 190010 2050 19505 185010 2000 19005 180010

240 x 42 2850 265010 250020 27505 260010 245020 27005 255015 240020 26005 245015 235020 255010 240015 230020

290 x 42 345010 320020 300030 335010 315020 295030 325010 305020 290030 315015 300025 285030 310015 290025 280035

2 / 90 x 42 1350 1250 1150 1300 1200 1150 1250 1200 1100 1200 1150 1100 1200 1150 1100

2 / 120 x 42 1800 1650 1550 1750 1600 1550 1700 1600 1500 1650 1550 1450 1600 1500 1450

2 / 140 x 42 2100 1950 1850 2050 1900 1800 1950 1850 1750 1900 1800 1700 1850 1750 1700

2 / 190 x 42 2850 2650 2500 2750 2600 2450 2650 2500 2400 2600 2450 2350 2550 2400 2300

2 / 240 x 42 3600 3350 3150 3450 3250 3050 3350 3200 3000 3300 3100 2950 3200 3050 2900

2 / 290 x 42 4100 3900 37505 4050 3850 37005 3950 3750 36005 3850 3700 335010 3800 36505 350010




Loadings: permanent - self weight + 40 kg/m2 + 0.6 kPa of the live load, live load = 1.5 kPa or floor point load = 1.8 kN, light roof and ceiling = 35 kg/m2, lightweight wall mass = 30 kg/m2, snow load = 1.0 kPa & wall height = 3000mm.

Lintel span

Upper floor load width

Jamb stud

Common stud

Lower storey lintel

Roof load width

Rafter or truss spacing




Floor mass – 40kg/m2

Lintels in Lower Storey Walls Heavy Roof – All Wind Speeds

Roof Load Width (mm) 1800 3000 4200 5400 6600

Floor Load Width (mm) 1800 2700 3600 1800 2700 3600 1800 2700 3600 1800 2700 3600 1800 2700 3600


90 x 42 1000 NS NS NS NS NS NS NS NS NS NS NS NS NS NS

120 x 42 1350 1250 1200 1250 1200 1150 1200 1150 1100 1150 1100 1050 1100 1050 1050

140 x 42 1550 1500 1400 1500 1400 1350 1400 1350 1300 1350 1300 1250 1300 1250 1200

190 x 42 2150 20005 190010 2000 19005 185010 1950 18505 175010 1850 17505 170015 18005 170010 165015

240 x 42 27005 255010 240020 25505 245015 230020 245010 235015 225025 235010 225015 215025 225010 215020 210025

290 x 42 325010 305020 290030 310015 295025 280030 295015 280025 270035 285020 270025 260035 270020 260030 255040

2 / 90 x 42 1250 1200 1150 1200 1150 1100 1150 1100 1050 1100 1050 1000 1050 1000 NS

2 / 120 x 42 1700 1600 1500 1600 1500 1450 1550 1450 1400 1450 1400 1350 1400 1350 1300

2 / 140 x 42 2000 1850 1750 1900 1800 1700 1800 1700 1650 1700 1650 1600 1650 1600 1550

2 / 190 x 42 2700 2550 2400 2550 2400 2300 2450 2300 2200 2350 2250 2150 2250 2150 2100

2 / 240 x 42 3400 3200 3050 3200 3050 2900 3050 2950 2800 2950 2800 27005 2850 2750 26505

2 / 290 x 42 3950 3800 36505 3800 3650 35005 3700 35505 340010 3550 34005 330010 3400 33005 320010

Loadings: permanent - self weight + 40 kg/m2 + 0.6 kPa of the live load, live load = 1.5 kPa or floor point load = 1.8 kN, heavy roof and ceiling = 75 kg/m2, lightweight wall mass = 30 kg/m2, snow load = 1.0 kPa & wall height = 3000mm.

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. Upper floor mass of 40 kg/m2, lightweight wall mass 20 kg/m2, snow loads 1.0 kPa3. Minimum bearing length = 35 mm at end supports. Subscript values indicate the minimum additional bearing length where required to be greater than 35 mm.4. Restraint value for slenderness calculations is 600 mm.




Lintels in Single/Upper Storey Walls Supporting TG Light Roof and Ceiling – All Wind Speeds

Loadings: Permanent - light roof and ceiling = 35 kg/m2, snow load = 1.0 kPa

GT Setback (mm)

1800 2400 3600

Truss Span (mm)

6000 7200 8400 9600 10800 12000 6000 7200 8400 9600 10800 12000 6000 7200 8400 9600 10800 12000

Member Size DxB (mm)

Maximum Allowable Span (mm)

190 x 42 220020 21005 20005 100010 170010 160015 210025 20005 100010 170010 150015 140015 11005 170010 150010 140015 120020 110020

240 x 42 29005 280010 260015 250015 230020 120025 28005 270010 250015 230020 120020 100025 250010 150015 120020 100025 180025 160030

290 x 42 360010 340015 320020 300025 280030 270030 350015 330020 310025 290025 270030 150035 320020 290020 270025 150030 130035 110040

2 / 190 x 42 2900 28005 270010 250010 240015 240020 28005 260010 250010 240015 230020 220025 260010 240015 230020 220025 210030 120015

2 / 240 x 42 38005 360010 350015 340020 320020 310025 360010 350015 330020 320025 310030 30005 340015 320020 310025 290030 28005 270010

2 / 290 x 42 440010 430015 410020 400025 39005 380010 430010 410020 400025 39005 38005 370010 410020 390025 38005 37005 360010 350015

GT Setback

Truss spanLintel span







Lintels in Single/Upper Storey Walls Supporting TG Heavy Roof and Ceiling – All Wind Speeds

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. Lightweight roof 35 kg/m2, heavy roof 75 kg/m2, snow loads 1.0 kPa3. Maximum truss overhang 900 mm4. Minimum bearing length = 35 mm at end supports. Subscript values indicate the minimum additional bearing length where required to be greater than 35 mm.

GT Setback (mm)

1800 2400 3600

Truss Span (mm)

6000 7200 8400 9600 10800 12000 6000 7200 8400 9600 10800 12000 6000 7200 8400 9600 10800 12000


Maximum Allowable Span (mm)

190 x 42 200030 190040 170010 150015 140020 130020 110015 170010 150015 140020 120020 120025 150010 140015 120020 100025 NS NS

240 x 42 270040 250050 230055 120030 100030 180030 250050 230055 120030 100030 180030 160035 130030 100035 170030 160030 140035 120040

290 x 42 320050 300055 280065 260070 240075 130045 320055 290065 270070 140045 120045 110045 270070 150045 130045 110045 190045 180050

2 / 190 x 42 27005 250010 240015 230020 220025 210030 250010 240015 230020 220025 210030 20005 230020 220025 210030 110015 19005 180010

2 / 240 x 42 350015 330020 320025 310030 290035 280040 330015 320025 300030 290035 280040 270045 310025 290030 280040 270045 260050 130030

2 / 290 x 42 410020 400025 380030 370035 360040 360045 400020 380030 370035 360040 350050 340055 380030 360035 350045 340055 320060 310070



Ceiling mass – 17.5kg/m2

Ceiling Joists – All Wind Speeds

Loadings: Ceiling mass = 17.5kg/m2, ceiling live load = 0.5kPa or point load = 1.0kN


D.L Minimum of span/300

L.L Minimum of span/300

P.L Minimum of span/300 or 25mm

Hanging Beam

Rafter

Ceiling joist spacing

Ceiling joist span

Single joist span

Continuous span ceiling joist

Ceiling Joist spacing (mm) 450 600 900 1200 450 600 900 1200

Member Size DxB (mm) Maximum Allowable Single Span (mm) Maximum Allowable Continuous Span (mm)

90 x 42 2500 2500 2500 2500 3100 3100 3100 3000

120 x 42 3850 3850 3450 3200 4800 4450 4050 3750

140 x 42 4600 4300 3900 3600 5400 5000 4550 4200

190 x 42 5800 5400 4900 4550 6750 6300 5700 5300

240 x 42 6950 6450 5850 5400 8050 7500 6800 6300

290 x 42 7950 7450 6700 6250 9250 8650 7800 7300

Notes:1. D = member depth, B = member breadth2. Do not walk on joists during construction unless a construction plank is in place3. Minimum end/internal bearing length of 70 mm



Ceiling mass – 17.5kg/m2

Ceiling Runner/Hanging Beam Supporting Ceiling Loads Only

Loadings: Ceiling mass = 17.5kg/m2, ceiling live load = 0.5kPa or point load = 1.0kN




P.L Minimum of span/300 or 25mm

Hanging Beam span

Ceiling joist

Ceiling load width (mm) 1200 1800 2400 3000 3600 4200 4800

Member Size DxB (mm) Maximum Allowable Span (mm)

190 x 42 4950 4500 4150 3900 3700 3500 3300

240 x 42 5850 5300 4900 4600 4400 4200 4000

290 x 42 6650 6050 5650 5300 5050 4800 4600

2 / 190 x 42 5650 5200 4850 4550 4350 4150 3950

2 / 240 x 42 6650 6100 5700 5400 5150 4900 4700

2 / 290 x 42 7500 6950 6500 6150 5850 5600 5400

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. The above table was based on a maximum ceiling mass of 20 kg/m2.3. Minimum bearing length = 70 mm at end supports.4. Not all sizes of SmartLVL 15 in this table are stocked in New Zealand Please check with your supplier before ordering

Hanging Beam

Ceiling Load width= X/2

‘X’ = Total of ceiling joist spans either side of hanging beam



Rafter spacing

(mm) Roof mass

(kg/m2)

450 600 900 1200 (see note 6) 450 600 900 1200

(see note 6)

Member Size DxB

(mm)

Span O/H Span O/H Span O/H Span O/H Span O/H Span O/H Span O/H Span O/H

Maximum Allowable Single Span & Overhang (mm) Maximum Allowable Continuous Span & Overhang (mm)

90 x 42

30 2300 750 2250 700 2250 700 2050 675 2850 750 2850 750 2850 700 2750 675

40 2300 750 2250 700 2250 700 2050 675 2850 750 2850 750 2850 700 2750 675

75 2300 750 2200 700 1950 600 1750 575 2850 750 2850 700 2650 650 2400 625

90 2300 750 2100 650 1850 600 1650 500 2850 750 2850 700 2500 650 2250 600

120 x 42

30 3500 1000 3400 1000 3000 950 2700 850 4150 1000 4150 1000 4050 1000 3700 950

40 3500 1000 3400 1000 3000 950 2700 850 4150 1000 4150 1000 4050 1000 3700 950

75 3200 1000 2950 950 2600 850 2350 775 4150 1000 4000 1000 3500 1000 3200 925

90 3050 1000 2800 900 2450 800 2200 725 4100 1000 3750 1000 3300 950 3000 900

140 x 42

30 4150 1150 4000 1150 3500 1125 3150 1000 4850 1150 4850 1150 4750 1125 4300 1050

40 4150 1150 4000 1150 3500 1125 3150 1000 4850 1150 4850 1150 4750 1125 4300 1050

75 3750 1150 3400 1100 3000 950 2750 900 4850 1150 4650 1150 4100 1125 3750 1050

90 3550 1150 3250 1050 2850 900 2600 850 4800 1150 4400 1150 3850 1125 3500 1050

190 x 42

30 5550 1550 5400 1550 4750 1425 4300 1325 6550 1550 6550 1550 6400 1425 5850 1325

40 5550 1550 5400 1550 4750 1425 4300 1325 6550 1550 6550 1550 6400 1425 5850 1325

75 5000 1550 4600 1500 4050 1325 3700 1200 6550 1550 6200 1550 5500 1425 5050 1325

90 4750 1550 4350 1425 3850 1250 3500 1150 6350 1550 5900 1550 5200 1425 4750 1325

240 x 42

30 6900 1925 6800 1875 6000 1700 5450 1575 8300 1925 8300 1875 7950 1700 7350 1575

40 6900 1925 6650 1875 6000 1700 5450 1575 8300 1925 8300 1875 7700 1700 7200 1575

75 6200 1925 5750 1875 5100 1675 4650 1525 7800 1925 7300 1875 6700 1700 6250 1575

90 5950 1925 5450 1750 4800 1575 4400 1450 7500 1925 7050 1875 6400 1700 6000 1575

Lightweight roof mass - 30 & 40 kg/m2 Heavyweight roof mass - 75 & 90 kg/m2

Roof Rafter Supporting Lightweight and Heavy Roof – Low to Medium Wind Speeds


D.L Minimum of span/300 or 25mm

L.L Minimum of span/300 or 25mm

WIND Minimum of span/300 or 25mm

Rafter span

Overhang

Rafter spacing

Rafter

Propped ridgeboard

Maximum Birdsmouth = 30% of rafter depth



Roof Rafter Supporting Lightweight and Heavy Roof – Low to Medium Wind Speeds continued

Rafter spacing

(mm) Roof mass

(kg/m2)

450 600 900 1200 (see note 6) 450 600 900 1200

(see note 6)

Member Size DxB

(mm)



290 x 42

30 8250 2325 8000 2175 7200 1950 6500 1825 10000 2325 10000 2175 9150 1950 8550 1825

40 8000 2325 7550 2175 7000 1950 6550 1825 10000 2325 9500 2175 8800 1950 8250 1825

75 7100 2325 6650 2175 6100 1950 5600 1825 8900 2325 8400 2175 7650 1950 72005 1825

90 6800 2200 6400 2100 5800 1900 5300 1700 8550 2325 8050 2175 7350 1950 69005 1825

Notes:1. D = member depth, B = member breadth, NS = not suitable2. The above table was based on a batten spacing of 900mm3. Lightweight roof 30 and 40 kg/m2, heavy roof 75 and 90 kg/m2, snow load 1.0 kPa4. Maximum birdsmouth depth = 30% of rafter depth5. End bearing lengths of 35mm at end supports & 35mm at internal supports for continuous members. Subscript values indicate

the minimum additional bearing length where required to be greater than 35mm at end supports & 35mm at internal supports6. Construction loads shall not be applied to overhangs until a 190x19 (minimum) timber fascia or other fascia of equivalent stiffness

is rigidly and permanently attached to the end of the rafter overhang.



Rafter spacing

(mm) Roof mass

(kg/m2)

450 600 900 1200 (see note 6) 450 600 900 1200

(see note 6)

Member Size DxB

(mm)



90 x 42

30 2300 750 2250 725 2250 575 2050 500 2850 750 2850 725 2850 575 2750 500

40 2300 750 2250 725 2250 575 2050 500 2850 750 2850 725 2850 575 2750 500

75 2300 750 2200 700 1950 600 1750 525 2850 750 2850 700 2650 600 2400 525

90 2300 750 2100 650 1850 600 1650 525 2850 750 2850 700 2500 625 2250 525

120 x 42

30 3500 1000 3400 900 3000 725 2700 625 4150 1000 4150 900 4050 725 3700 625

40 3500 1000 3400 925 3000 725 2700 625 4150 1000 4150 925 4050 725 3700 625

75 3200 1000 2950 950 2600 775 2350 650 4150 1000 4000 950 3500 775 3200 650

90 3050 1000 2800 900 2450 775 2200 650 4100 1000 3750 975 3300 775 3000 650

140 x 42

30 4150 1150 4000 1050 3500 825 3150 700 4850 1150 4850 1050 4750 825 4300 700

40 4150 1150 4000 1050 3500 825 3150 700 4850 1150 4850 1050 4750 825 4300 700

75 3750 1150 3400 1100 3000 875 2750 750 4850 1150 4650 1100 4100 875 3750 750

90 3550 1150 3250 1050 2850 875 2600 750 4800 1150 4400 1100 3850 875 3500 750

190 x 42

30 5550 1550 5400 1325 4750 1050 4300 900 6550 1550 6550 1325 6400 1050 5850 900

40 5550 1550 5400 1325 4750 1050 4300 900 6550 1550 6550 1325 6400 1050 5850 900

75 5000 1550 4600 1400 4050 1100 3700 950 6550 1550 6200 1400 5500 1100 5050 950

90 4750 1550 4350 1400 3850 1125 3500 950 6350 1550 5900 1400 5200 1125 4750 950

240 x 42

30 6900 1900 6800 1625 6000 1275 5450 1075 8300 1900 8300 1635 7950 1275 7350 1075

40 6900 1925 6650 1625 6000 1300 5450 1100 8300 1925 8300 1635 7700 1300 7200 1100

75 6200 1925 5750 1700 5100 1350 4650 1150 7800 1925 7300 1700 6700 1350 6250 1150

90 5950 1925 5450 1725 4800 1375 4400 1150 7500 1925 7050 1725 6400 1375 6000 1150


Roof Rafter Supporting Lightweight and Heavy Roof – High to Extremely High Wind Speeds




WIND Minimum of span/300 or 25mm

Rafter span

Overhang

Rafter spacing

Rafter

Propped ridgeboard

Maximum Birdsmouth = 30% of rafter depth



Roof Rafter Supporting Lightweight and Heavy Roof – High to Extremely High Wind Speeds continued

Rafter spacing

(mm) Roof mass

(kg/m2)

450 600 900 1200 (see note 6) 450 600 900 1200

(see note 6)

Member Size DxB

(mm)



290 x 42

30 8250 2225 8000 1875 7200 1500 6500 1250 10000 2225 10000 1875 9150 1500 8550 1250

40 8000 2225 7550 1900 7000 1500 6550 1275 10000 2225 9500 1900 8800 1500 8250 1275

75 7100 2325 6650 1975 6100 1575 5600 1325 8900 2325 8400 1975 7650 1575 72005 1325

90 6800 2200 6400 2000 5800 1600 5300 1350 8550 2325 8050 2000 7350 1600 69005 1350

Notes:1. D = member depth, B = member breadth, NS = not suitable2. The above table was based on a batten spacing of 900mm3. Lightweight roof 30 and 40 kg/m2, heavy roof 75 and 90 kg/m2, snow load 1.0 kPa4. Maximum birdsmouth depth = 30% of rafter depth5. End bearing lengths of 35mm at end supports & 35mm at internal supports for continuous members. Subscript values indicate

the minimum additional bearing length where required to be greater than 35mm at end supports & 35mm at internal supports6. Construction loads shall not be applied to overhangs until a 190x19 (minimum) timber fascia or other fascia of equivalent stiffness

is rigidly and permanently attached to the end of the rafter overhang.




Roof mass (kg/m2) Single span Overhang Contiuous span Overhang

190 x 42

30 4050 750 4150 750

40 4050 750 4150 750

70 3700 750 3800 750

90 3500 750 3600 750

240 x 42

30 4850 900 4950 900

40 4850 900 4950 900

70 4400 900 4550 900

90 4150 900 4300 900

290 x 42

30 5550 1050 57005 1050

40 5550 1050 570010 1050

70 5050 1050 525015 1050

90 4750 1050 495015 1050


Hip Rafter Lightweight and Heavy Roofs – All Wind Speeds




WIND Minimum of span/300 or 25mmOverhang (actual length)

Hip rafter

Hip span (actual length)




Roof mass (kg/m2) Single span Overhang Contiuous span Overhang

2/ 190 x 42

30 4800 1075 4950 1075

40 4800 1075 4950 1075

70 4350 1075 4550 1075

90 4100 1075 4250 1075

2/ 240 x 42

30 5750 1275 5900 1275

40 5750 1300 5900 1300

70 5200 1300 5400 1300

90 4900 1300 5050 1300

2/ 290 x 42

30 6600 1500 6800 1500

40 6600 1500 6800 1500

70 5950 1500 6150 1500

90 5600 1500 5850 1500

Hip Rafter – Lightweight and Heavy Roofs all Wind Speeds continued

Notes: 1. D = member depth, B = member breadth, NS = not suitable.2. The above table was based on a batten spacing of 900 mm3. Lightweight roof 30 and 40 kg/m2, heavy roof 75 and 90 kg/m2, snow load 1.0 kPa4. Minimum backspan = 200 % of overhang5. Maximum birdsmouth depth = 30 % of depth6. End bearing length = 35 at end supports. Subscript values indicate the minimum additional bearing length where required to be greater than 35 mm at end support7. Construction loads shall not be applied to overhangs until a 190x19 mm (min) timber fascia or other fascia of equivalent stiffness is rigidly and permanently attached

to the end of rafter overhangs



Light roof with ceiling mass - 40 kg/m2

Ridge/Intermediate Roof Beam Light Roof and Ceiling – Low to Medium Wind Speed

Rafter

Ridge/Intermediate beamDesign Deflection Limits



Supports (Post, wall etc)

Supporting wall or Intermediate beam

Ridge beam span‘Y’=Rafter span 2

‘X’=Rafter span 1

Roof load width= (x + Y)/2

Roof load width (mm) 1800 3000 4200 5400 6600 1800 3000 4200 5400 6600


190 x 42 3750 3150 2850 2600 2400 4700 4100 3450 30005 270015

240 x 42 4450 3950 3600 32505 300010 5600 4950 425015 370025 330040

290 x 42 5150 4550 41505 390010 365020 6500 570010 500030 440050 395070

2/ 190 x 42 4450 3950 3550 3250 3000 5600 4950 4550 4250 4050

2/ 240 x 42 5300 4700 4300 4050 3750 6700 5900 5400 5100 48505

2/ 290 x 42 6150 5400 4950 4650 4450 7700 6800 6250 58505 555020

Supporting wall

Intermediate roof beam

Rafter


‘Y’=Rafter span 2

Roof load width = (x + Y)/2 Intermediate roof

beam span



Heavy roof with ceiling mass - 90 kg/m2

Ridge/Intermediate Roof Beam Heavy Roof and Ceiling – Low to Medium Wind Speed



190 x 42 3050 2550 2250 2050 19005 4100 3450 295010 255020 230035

240 x 42 3850 3200 2850 260010 240015 5200 430010 360030 315045 285065

290 x 42 4600 3900 345010 315015 290025 6200 510030 430055 375075 340095

2/ 190 x 42 3800 3200 2850 2600 2400 5150 4350 3850 3500 3250

2/ 240 x 42 4750 4000 3600 3250 3050 6350 5450 4850 445010 415020

2/ 290 x 42 5750 4850 4300 3950 36505 7300 6450 585010 535025 500045

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. Lightweight roof 40 kg/m2, heavy roof 90 kg/m2, snow load 1.0 kPa3. End bearing lengths = 35 mm at end supports and 70 mm at internal supports for continuous members. Subscript values indicate the minimum

additional bearing length where required to be greater than 35 mm at end supports and 70 mm at internal supports rafter spacing up to 1200 mm4. Not all sizes of Prospan SmartLVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering



Light roof with ceiling mass - 40 kg/m2

Ridge/Intermediate Roof Beam Light Roof and Ceiling – High to Extremely High Wind Speed

Rafter

Ridge/Intermediate beamDesign Deflection Limits



Supports (Post, wall etc)

Supporting wall or Intermediate beam

Ridge beam span‘Y’=Rafter span 2


Roof load width= (X+Y)/2



190 x 42 3750 3150 2850 2600 2400 4700 3850 3300 2900 265015

240 x 42 4450 3950 3600 32505 300010 5600 4750 405010 360025 325040

290 x 42 5150 4550 41505 390010 365020 6500 565010 480025 425045 390065

2/ 190 x 42 4450 3950 3550 3250 3000 5600 4950 4550 4250 4000

2/ 240 x 42 5300 4700 4300 4050 3750 6700 5900 5400 5100 48505

2/ 290 x 42 6150 5400 4950 4650 4450 7700 6800 6250 58505 555020

Supporting wall

Intermediate roof beam

Rafter


‘Y’=Rafter span 2

Roof load width = (X+Y)/2 Intermediate roof

beam span



Heavy roof with ceiling mass - 90 kg/m2

Ridge/Intermediate Roof Beam Heavy Roof and Ceiling – High to Extremely High Wind Speed



190 x 42 3050 2550 2250 2050 19005 4100 3450 295010 255020 230035

240 x 42 3850 3200 2850 260010 240015 5200 430010 360030 315045 285065

290 x 42 4600 3900 345010 315015 290025 6200 510030 430055 375075 340095

2/ 190 x 42 3800 3200 2850 2600 2400 5150 4350 3850 3500 3250

2/ 240 x 42 4750 4000 3600 3250 3050 6350 5450 4850 445010 415020

2/ 290 x 42 5750 4850 4300 3950 36505 7300 6450 585010 535025 500045

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. Lightweight roof 40 kg/m2, heavy roof 90 kg/m2, snow load 1.0 kPa3. End bearing lengths = 35 mm at end supports and 70 mm at internal supports for continuous members. Subscript values indicate the minimum additional bearing

length where required to be greater than 35 mm at end supports and 70 mm at internal supports rafter spacing up to 1200 mm4. Not all sizes of Prospan SmartLVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering



Verandah Beams Lightweight and Heavy Roof – Low to Medium Wind Speed




Rafter or trusses

Roof load width


Verandah beam span

Verandah beam

Roof load width (mm) Roof

mass (kg/m2)

1200 1800 2400 3000 3600 4200 1200 1800 2400 3000 3600 4200

Member size DxB (mm) Maximum Allowable Single Span (mm) Maximum Allowable Continuous Span (mm)

190 x 42

10 3700 3300 3100 2900 2800 2600 5100 4600 4200 3900 3700 3500

20 3700 3300 3100 2900 2800 2600 5100 4600 4200 3900 3700 3500

40 3700 3300 3100 2900 2800 2600 5100 4600 4200 3900 3700 3400

75 3600 3200 2900 2800 2600 24005 4900 4300 3900 3600 3300 2900

90 3400 3000 2800 2600 24005 230010 4600 4100 3700 3400 3200 29005

200 x 42

10 3900 3500 3200 3000 2900 2800 5300 4800 4400 4200 3900 3700

20 3900 3500 3200 3000 2900 2800 5300 4800 4400 4200 3900 3700

40 3900 3500 3200 3000 2900 2800 5300 4800 4400 4200 3900 3600

75 3800 3400 3100 2900 2700 26005 5000 4500 4200 3800 3400 32005

90 3600 3200 2900 2700 26005 240010 4800 4300 3900 3600 3300 29005

240 x 42

10 4700 4200 3900 3600 3400 3300 6100 5500 5100 4900 4600 4400

20 4700 4200 3900 3600 3400 3300 6100 5500 5100 4900 4600 4400

40 4700 4200 3900 3600 3400 3300 6100 5500 5100 4900 4600 430010

75 4600 4100 3700 3400 3200 31005 5800 5200 4900 45005 410015 380025

90 4400 3800 3500 3200 30005 290010 5500 5000 4600 430010 390020 360030

290 x 42

10 5500 5000 4700 4400 4200 4000 7000 6300 5900 5600 5300 5100

20 5500 5000 4700 4400 4200 4000 7000 6300 5900 5600 5300 510010

40 5500 5000 4700 4400 42005 4000 7000 6300 5900 56005 530015 510030

75 5300 4800 4500 42005 39005 370010 6600 6000 56005 530025 490035 450045

90 5100 4600 4200 3900 37005 350010 6300 5800 540010 510030 460040 430050



Verandah Beams Lightweight and Heavy Roof – Low to Medium Wind Speed continued


mass (kg/m2)

1200 1800 2400 3000 3600 4200 1200 1800 2400 3000 3600 4200

Member size DxB (mm)

Maximum Allowable Single Span (mm) Maximum Allowable Continuous Span (mm)

2/ 190 x 42

10 4700 4200 3900 3600 3400 3200 6100 5500 5100 4900 4600 4400

20 4700 4200 3900 3600 3400 3200 6100 5500 5100 4900 4600 4400

40 4700 4200 3900 3600 3400 3200 6100 5500 5100 4900 4600 4400

75 4500 4000 3600 3400 3200 3000 5700 5200 4900 4600 4300 4200

90 4300 3800 3400 3200 3000 2900 5500 5000 4600 4300 4100 3900

2/ 240 x 42

10 5700 5200 4900 4600 4400 4200 7300 6500 6100 5800 5500 5300

20 5700 5200 4900 4600 4400 4200 7300 6500 6100 5800 5500 5300

40 5700 5200 4900 4600 4400 4200 7300 6500 6100 5800 5500 5300

75 5400 4900 4600 4300 4100 3800 6700 6100 5800 5500 5200 5000

90 5200 4700 4400 4100 3800 3600 6500 5900 5500 5200 5000 4800

2/ 290 x 42

10 6500 6000 5600 5300 5100 4900 8400 7500 7000 6600 6300 6100

20 6600 6000 5600 5300 5100 4900 8400 7500 7000 6600 6300 6100

40 6600 6000 5600 5300 5100 4900 8400 7500 7000 6600 6300 6100

75 6200 5600 5300 5000 4800 4600 7700 7000 6600 6200 6000 5800

90 5900 5400 5100 4800 4600 4400 7400 6700 6300 6000 5800 5600

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. Lightweight roof 10, 20 and 40 kg/m2, heavy roof 75 and 90 kg/m2, snow load 1.0 kPa3. End bearing lengths = 45 mm at end supports and 70 mm at internal supports for continuous members. Subscript values indicate

the minimum additional bearing length where required to be greater than 35 mm at end supports and 70 mm at internal supports4. Restraint value for slenderness calculations is 1200 mm5. Not all sizes of Prospan SmartLVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering.



Verandah Beams Lightweight and Heavy Roof – High to Extremely High Wind Speed




Rafter or trusses

Roof load width


Verandah beam span

Verandah beam


mass (kg/m2)

1200 1800 2400 3000 3600 4200 1200 1800 2400 3000 3600 4200


190 x 42

10 3700 3300 3100 2900 2800 2600 5100 4600 4200 3900 3500 3200

20 3700 3300 3100 2900 2800 2600 5100 4600 4200 3900 3500 3300

40 3700 3300 3100 2900 2800 2600 5100 4600 4200 3900 3600 3300

75 3600 3200 2900 2800 2600 24005 4900 4300 3900 3600 3300 2900

90 3400 3000 2800 2600 24005 230010 4600 4100 3700 3400 3200 2900

240 x 42

10 4700 4200 3900 3600 3400 3300 6100 5500 5100 4800 4400 4100

20 4700 4200 3900 3600 3400 3300 6100 5500 5100 4900 4400 4100

40 4700 4200 3900 3600 3400 3300 6100 5500 5100 4900 4500 4200

75 4600 4100 3700 3400 3200 31005 5800 5200 4900 45005 410015 3800

90 4400 3800 3500 3200 30005 290010 5500 5000 4600 430010 390020 3600

290 x 42

10 5500 5000 4700 4400 4200 4000 7000 6300 5900 5600 5200 4800

20 5500 5000 4700 4400 4200 4000 7000 6300 5900 5600 5300 4900

40 5500 5000 4700 4400 42005 4000 7000 6300 5900 56005 530015 5000

75 5300 4800 4500 42005 39005 370010 6600 6000 56005 530025 490035 4500

90 5100 4600 4200 3900 37005 350010 6300 5800 540010 510030 460040 4300




mass (kg/m2)

1200 1800 2400 3000 3600 4200 1200 1800 2400 3000 3600 4200


2/ 190 x 42

10 4700 4200 3900 3600 3400 3200 6100 5500 5100 4900 4600 4400

20 4700 4200 3900 3600 3400 3200 6100 5500 5100 4900 4600 4400

40 4700 4200 3900 3600 3400 3200 6100 5500 5100 4900 4600 4400

75 4500 4000 3600 3400 3200 3000 5700 5200 4900 4600 4300 4200

90 4300 3800 3400 3200 3000 2900 5500 5000 4900 4300 4100 3900

2/ 240 x 42

10 5700 5200 4900 4600 4400 4200 7300 6500 6100 5800 5500 5300

20 5700 5200 4900 4600 4400 4200 7300 6500 6100 5800 5500 5300

40 5700 5200 4900 4600 4400 4200 7300 6500 6100 5800 5500 5300

75 5400 4900 4600 4300 4100 3800 6700 6100 5800 5500 5200 5000

90 5200 4700 4400 4100 3800 3600 6500 5900 5500 5200 5000 4800

2/ 290 x 42

10 6650 6000 5600 5300 5100 4900 8400 7500 7000 6600 6300 6100

20 6600 6000 5600 5300 5100 4900 8400 7500 7000 6600 6300 6100

40 6600 6000 5600 5300 5100 4900 8400 7500 7000 6600 6300 6100

75 6200 5600 5300 5000 4800 4600 7700 7000 6600 6200 6000 5800

90 5900 5400 5100 4800 4600 4400 7400 6700 6300 6000 5800 5600

Verandah Beams Lightweight and Heavy Roof – High to Extremely High Wind Speed continued

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. Lightweight roof 10, 20 and 40 kg/m2, heavy roof 75 and 90 kg/m2, snow load 1.0 kPa3. End bearing lengths = 45 mm at end supports and 70 mm at internal supports for continuous members. Subscript values indicate

the minimum additional bearing length where required to be greater than 35 mm at end supports and 70 mm at internal supports4. Restraint value for slenderness calculations is 1200 mm5. Not all sizes of Prospan SmartLVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering.



Garage Roof Beams – Lightweight and Heavy Roof Low to Medium Wind Speed





mass (kg/m2)

1800 3000 4200 5400 6600 1800 3000 4200 5400 6600


190 x 4240 3500 3000 2800 25005 230015 5600 4000 3400 2900 280015

90 2800 2300 2000 19005 170010 3700 3100 2800 260015 170030

240 x 4240 4400 3800 3400 31005 300015 5500 4900 430010 380025 320030

90 3400 2900 270010 240020 220030 4500 3900 350025 310035 290060

290 x 4240 5000 4400 410010 380010 350020 6300 5600 520030 450045 410065

90 4100 3500 320010 290025 280030 5200 460015 420045 360075 320080

2/ 190 x 4240 4300 3800 3400 3100 2900 5400 4800 4400 4200 3900

90 3400 2900 2700 2400 2200 4400 3900 3500 3200 3000

2/ 240 x 4240 5100 4500 4200 3900 3700 6400 5700 5300 5000 4700

90 4200 3700 3300 3000 2900 5300 4700 4300 4000 380010

2/ 290 x 4240 5800 5200 4800 4500 4300 7300 6500 6100 5700 550010

90 4900 4300 4000 3600 3400 6100 5400 5000 470010 440025

Lightweight roof mass - 40 kg/m2 Heavyweight roof mass - 90 kg/m2

Roof load width

Garage beam span


Garage opening beam

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. Lightweight roof 30 and 40 kg/m2, heavy roof 75 and 90 kg/m2, snow load 1.0 kPa3. End bearing lengths = 45 mm at end supports and 70 mm at internal supports for continuous members. Subscript values indicate

the minimum additional bearing length where required to be greater than 35 mm at end supports and 70 mm at internal supports4. Restraint value for slenderness calculations is 1200 mm5. Not all sizes of Prospan SmartLVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering.



Garage Roof Beams – Lightweight and Heavy Roof High and Extremely High Wind Speed




Roof load (mm) Roof

mass (kg/m2)

1800 3000 4200 5400 6600 1800 3000 4200 5400 6600

Member DxB (mm) Maximum Allowable Single Span (mm) Maximum Allowable Continuous Span (mm)

190 x 4240 3500 3000 2800 25005 230015 4600 4000 3300 2900 270015

90 2800 2300 2000 19005 170010 3700 3100 2800 260015 170030

240 x 4240 4400 3800 3400 31005 300015 5500 4900 420010 360020 310020

90 3400 2900 270010 240020 220030 4500 3900 350025 310035 290060

290 x 4240 5000 4400 410010 380010 350020 6300 5600 500025 440040 400060

90 4100 3500 320010 290025 280030 5200 460015 420045 360075 320080

2/ 190 x 4240 4300 3800 3400 3100 2900 5400 4800 4400 4200 3900

90 3400 2900 2700 2400 2200 4400 3900 3500 3200 3000

2/ 240 x 4240 5100 4500 4200 3900 3700 6400 5700 5300 5000 4700

90 4200 3700 3300 3000 2900 5300 4700 4300 4000 380010

2/ 290 x 4240 5800 5200 4800 4500 4300 7300 6500 6100 5700 550010

90 4900 4300 4000 3600 3400 6100 5400 5000 470010 440025

Lightweight roof mass - 40 kg/m2 Heavyweight roof mass - 90 kg/m2

Roof load width

Garage beam span


Garage opening beam

Notes:1. D = member depth, B = member breadth, NS = not suitable.2. Lightweight roof 30 and 40 kg/m2, heavy roof 75 and 90 kg/m2, snow load 1.0 kPa3. End bearing lengths = 45 mm at end supports and 70 mm at internal supports for continuous members. Subscript values indicate

the minimum additional bearing length where required to be greater than 35 mm at end supports and 70 mm at internal supports4. Restraint value for slenderness calculations is 1200 mm5. Not all sizes of Prospan SmartLVL 15 in this table are stocked in New Zealand. Please check with your supplier before ordering.

Documents

Prolam LVL 15 Design Guide - prolamnz.com … · Prolam LVL preservation treatment standard 20 June 2017 to meet the durability requirements where hazard class H1.2 or less applies