MTC Solutions formerly MyTiCon - Rigging Design Guide...material handling procedures conducted with the system outlined in this document are to be approved by a qualified design professional

MyTiCon Timber Connectorswww.myticon.com | 1.866.899.4090 | [email protected]

Rigging Design Guide

© 2018 by MyTiCon Timber Connectors May, 2018

Copyright © 2018 by MyTiCon Timber Connectors

All rights reserved. This document or any portion thereof may not be reproduced or used in any manner whatsoever without the expressed written permission of the publisher.

The information contained in this document is for general information purposes. We suggest that all rigging and panel material handling procedures conducted with the system outlined in this document are to be approved by a qualified design professional familiar with the governing site conditions and the conditions of the system. While we aim to keep the information provided in this document complete, accurate, up to date and in accordance with applicable design standards, we can not make warranties of any kind.

Images and drawings provided are for reference only and can not be applicable to all conditions that may occur on site. Any reliance you place on such information is therefore strictly at your own risk. In no event will we assume liability for any loss or damage including and without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from loss of profits arising out of, or in connection with the use of the system. Through the use of the document and system you are able to derive other uses which are outside of our control. The inclusion of the system or the implied use of the document to other applications is outside of our responsibility.

2

TABLE OF CONTENTSRIGGING DEVICES ........................................................................................................ 6

Yoke Dimension Specifications .................................................................................. 7NOTES TO THE DESIGNER .......................................................................................... 9PREPARING A RIGGING PLAN .................................................................................... 10DETERMINING THE FACTORED TOTAL LOAD (Wf) ...................................................11

Factored Total Load (Wf) Equation ............................................................................11Dynamic Acceleration Factor (Kv) ........................................................................11Optional Safety Factor (KOS) ................................................................................11

CALCULATING THE CAPACITY OF THE ANCHORS (Nr) .......................................... 12Capacity of the Anchors (Nr) Equation ..................................................................... 12

Sling Angle Reduction Factor (RAR) .................................................................... 12Load Spreader Reduction Factor (RLS) ............................................................... 12Load Duration Reduction Factor (RD) ................................................................. 12

Screw Selection Guide ............................................................................................. 13BASIC FACTORED RESISTANCE VALUE PER ANCHOR (N’r) ................................... 14

Floor/Roof CLT Panel Rigging ................................................................................. 14Wall CLT Panel Rigging ........................................................................................... 16Glulam Beam Rigging .............................................................................................. 17

SLING INSTALLATION .................................................................................................. 18Sling Angle ............................................................................................................... 18Load Spreading ....................................................................................................... 19

END AND EDGE DISTANCE REQUIREMENTS .......................................................... 20Floor/Roof CLT Panel Rigging ................................................................................. 20Wall CLT Panel Rigging ........................................................................................... 21Glulam Beam Rigging .............................................................................................. 21

RECOMMENDED WORKFLOW ................................................................................... 22CHECK LIST ................................................................................................................. 23

3

“Build Strong, Build Sustainable, Build The Future”

MyTiCon is a specialty supplier of connection systems for modern mass-timber and heavy-timber applications in commercial, industrial and residential projects. We are proud to be working with the most innovative partners on cutting-edge projects across North America. Are you working on a mass-timber project, looking to connect heavy timbers or use a timber-concrete composite CLT floor? We have the right solution for you.

We believe in the connection technologies we offer. We dedicate our team of product consultants and timber engineers to support you and your projects. Our specialists operate coast to coast in all time zones. We speak English, French and German.

Our goal is to see the mass-timber industry thrive and help to maintain a low carbon footprint through our support, our innovative research and cost-effective approaches.

4

Main and 49th Ave.2018

6507 Main Street – Punjabi Market in Vancouver is one of the first CLT hybrid structures in North America, combining conventional stick frame wall elements and CLT floor elements.

5

RIGGING DEVICES

Yoke 1TThe Yoke 1T system is designed and tested for light-to-medium weight CLT panels and glulam elements using ½” Kombi screws.

Through a variety of screw lengths, basic factored rigging capacities of up to 9.8 kN (2,200 lbs) per yoke can be achieved.

Yoke 5TThe Yoke 5T system is designed and tested for heavy CLT panels and glulam elements using ½” Kombi screws. Through a variety of screw lengths, basic factored rigging capacities of up to 34.3 kN (7,700 lbs) per yoke can be achieved.

Yoke XLThe Yoke XL system uses smaller diameter fasteners with appropriate spacing requirements to lift CLT panels on the narrow edge. Yoke XL anchors also provide a solution for flat panel rigging by using a greater number of fasteners to achieve adequate screw anchorage in 3-ply panels. This system is compatible with the 3/8” Ecofast capable of rigging 3-1/8” (78 mm) thick panels and VG CSK (fully threaded) fasteners, with a maximum basic factored rigging capacity of 48.9 kN (11,000 lbs) per yoke.

Different rigging systems are available designed for a diversity of mass timber elements, in most rigging scenarios. Safe rigging is achieved using code-approved, high-strength fasteners used in combination with lab-tested rigging devices called yokes. By selecting the appropriate yoke, and adjusting fastener size, mass timber elements of all weights, types, and dimensions can be rigged.

6

Yoke Dimension Specifications

98 mm

72 mm

50 mm

14 mm

89 mm

12 mm

12 mm

22 mm

74 mm

43 mm190 mm

190 mm

61 mm

64 mm

40 mm

40 mm

16 mm

22 mm

74 mm

43 mm

61 mm

90 mm

380 mm

50 mm50 mm

30 mm

30 mm

30 mm

30 mm

Figure 1. Yoke 1T anchor specifications

Figure 2. Yoke 5T anchor specifications

Figure 3. Yoke XL anchor specifications

The following page presents the different yoke dimension specifications.

7

All products listed in this design guide have undergone comprehensive testing up to ultimate failure of the system using North American timber species.

TESTED PRODUCT

RIGGING HAZARDSIn order to ensure safe rigging operation, special attention should be given to the following points:

• Factored load of the rigged element (Wf)• Maximum anchor capacity (Nr)• Maximum capacity of slings, ropes, connection points and other hardware (Please refer to your

respective rigging equipment provider).

In order to ensure stable rigging with appropriate load sharing, the center of gravity shall be determined and pick points shall be chosen accordingly.

All rigging shall be done by qualified personnel only. Before each lift, all hardware shall be checked for possible defects, material fatigue or abrasion.

Picture provided by BYU

8

1. All rigging elements shall be approved by a licensed design professional. It is the responsibility of the rigger to ensure proper work safety environment and verify the condition of the equipment. All suggestions and details shown are to be treated as general and can not be assumed to be valid for all construction requirements & specific site conditions.

2. In this guide, the term “yoke” refers only to the yoke itself, while the term “anchor” refers to the yokes and the screws as a system. The capacity of the yoke represents the upper limit in terms of capacity per anchor, while the basic factored resistance of the anchor (N’r) takes into account the capacity of the screws.

3. Rigging capacity:• The total capacity of the anchors (Nr), resolved into the vertical components, must be greater than the

factored total load (Wf) of the rigged element.• To ensure full connection capacities, fasteners should penetrate panel plies to the largest extent

possible, with a minimum of three plies penetrated.

4. Anchor placement:• End and edge distance requirements must be respected, (see p.20 for more details).• Additional moment equilibrium calculations are required to determine the proportion of the factored

total load shared by each anchor for situations where anchors are not spaced equidistant around the center of gravity.

• The placement of the anchors should not exceed the maximum span of the lifted element.

5. Rigging slings and load spreader:• Slings must lift elements at a minimum angle of 60° measured between the sling and the panel surface

(β). Otherwise, the capacity of the anchors shall be adjusted with the appropriate sling angle reduction factor (RAR) given in Table 3.

• Sling angles should not exceed 30° measured between the sling and the vertical (λ) to avoid excessive forces in the slings.

• A load spreader/compensation system shall be used for lifts using more than two anchors. Otherwise, the capacity of the anchors shall be adjusted with the appropriate load spreader reduction factor (RLS).

6. Rigging condition requirements:• Before each lift, check to see that the sling is properly attached.• The load line should be brought over the element’s center of gravity before the lift.• No object or person can be present on the panels when rigged (no live load).• Suspended loads should be securely slung and properly balanced before they are set in motion.• Keep the load under control at all times. The use of taglines is recommended to prevent uncontrolled

motion.• Loads must be safely landed and properly blocked before being unhooked and unslung.

7. To ensure safety and proper capacity, the fasteners used for panel rigging should only be used once. Proper inspection should be performed frequently to ensure the structural integrity of the devices. If any damage or failure is noticed, stop using the device immediately.

8. The maximum installation torque of the screws is as follows:

NOTES TO THE DESIGNER

Screw diameter 3/8” [10 mm] 1/2” [12 mm]

Maximum torque 32.7 N∙m 47.3 N∙m

Table 1, Fastener Torsional Strength

9

PREPARING A RIGGING PLANThe procedure proposed below contains the steps recommended for the licenced design professional to prepare a rigging plan.

Assigned Relative Densities (G)

S-P-F Douglas FirG = 0.42 G = 0.49

Note: As per CSA O86 2016, Table A.12.1. All connection design must meet all relevant requirements of the Notes to the Designer section.

Determine the factored total load (Wf) based on weight of the panel and rigging conditions (p.11).

Determine the minimum basic factored resistance value per anchor (N’r) required based on:• Anchor capacity calculation, (p.12)• Recommended fastener length, (p.13). • Basic factored resistance value per anchor, (p.14 - p.17).

Verify the sling angle relative to the element surface (β), and the effective number of anchors, (p.12). Determine the sling angle relative to the vertical (λ).

Determine the pick points, considering even load sharing as well as edge and end distance requirements, (p.20).

Type of Rigging

Floor or Roof CLT Panel

Wall CLT Panel Glulam Beam

Determine the type of rigging and the assigned relative density based on wood species.Step 1)

Step 2)

Step 3)

Step 4)

Step 5)

The type of rigging is divided into three different categories depending on what type of engineered wood product is rigged and the orientation of the element.

Basic factored resistance values are calibrated to lift elements made of S-P-F or D.fir wood. The assigned relative densities are as follows:

10

DETERMINING THE FACTORED TOTAL LOAD (Wf)Determining the factored total load (Wf) of the rigged element is essential. Actual loads must be factored up. The proposed method incorporates a dead load factor (1.4), a dynamic acceleration factor, and an optional safety factor considering the rigging scenario. In all the cases, the factored total loads (Wf) shall be specified and approved by a licensed design professional. The proposed method is presented below:

Wf = 1.4 ∙w ∙ Kv ∙ KOS

w Unfactored weight [kN or lbs]

Kv Dynamic acceleration factor

KOS Optional safety factor• For rigging mat rigging: KOS = 1• For open space rigging: KOS = 1.2• For tight space rigging: KOS = 1.3

The unfactored weight of the elements (w) is usually provided on shop drawings or manufacturer’s specifications.

Table 2 presents recommended dynamic acceleration factors (Kv) subject to approval by the licensed design professional.

Table 2, Proposed Dynamic Acceleration Factors, Kv

Source: Pfeifer, Snaam, Halfen, Peikko, Arteon

Crane Type Dynamic Acceleration Factor, Kv

Fixed crane 1.1 to 1.3Mobile crane 1.3 to 1.4Bridge crane 1.2 to 1.6Rigging and moving on flat terrain 2.0 to 2.5Rigging and moving on rough terrain 3.0 to 4.0

In cases where information on weight is not provided, a calculation based on the dimensions and the wood species may be done to estimate the unfactored weight:

w = (h ∙ b ∙ l) ∙ G ∙ C’

h Element thickness [mm]

b Element width [m]

l Element length [m]

G Assigned relative densities; 0.42 or 0.49

C’ Unit conversion factor [1]

• for pounds (lbs) : 2.54• for kilonewtons (kN) : 11.3 ∙ 10-3

[1] The unit conversion factor contains adjustments from oven dry to standard dry service condition moisture content.

11

Nr = N’r ∙ n ∙ RAR ∙ RLS ∙ RD

N’r Basic factored resistance value per anchor (provided in design tables)

n Number of anchors used

CALCULATING THE CAPACITY OF THE ANCHORS (Nr)

RAR Sling angle (β) reduction factor:• All sling angles are ≥60° to the panel surface: RAR = 1.0• One or more sling angle is <60° to the panel surface:

RLS Load spreader reduction factor:• If n = 2: RLR = 1.0• If n = 4, with adequate load spreader/compensation device: RLR = 1.0• If n = 4, without adequate load spreader/conpensation device: RLR = 0.5

RD Load duration reduction factor:• Short term rigging (<10 min): RD = 1.0• Long term rigging (>10 min): RD = 0.86

β 50° 40° 30° 20° 10° 0°

RAR 0.80 0.65 0.55 0.45 0.35 0.30

Table 3, Reduction factor for sling angle <60°

βa βb

βc βd

λaλb

λc λd

12

Screw Selection GuideFastener length is often limited by the thickness of the rigged panel element. While it is recommended that the screws should penetrate as many plies as possible, a minimum clearance of 10mm is recommended to avoid through penetration. The following table provides suggested fastener lengths for most common North American CLT thicknesses.

Table 4, ASSY® Screw Length Suggestion According to Panel Thickness

Note: Fastener lengths are suggestions only and can be adapted to fit certain site conditions and rigging needs. The thread length on the fastener determines the capacity of each system.

Kombi 1/2” x 6-1/4”

Kombi 1/2” x 4-3/4”

Kombi 1/2” x 4”

Kombi 1/2” x 3-1/8”

VG CSK 3/8” x 6-1/4”

VG CSK 3/8” x 4”

Ecofast 3/8” x 3-1/8”

CLT TypeYoke Type

Yoke 1T Yoke 5T Yoke XL

Number of Plies

Thickness

in. [mm] Screw in. [mm] Screw in. [mm] Screw in. [mm]

3-ply

3-1/8” [78]

Kombi 1/2” x 3-1/8” [12x80] Kombi 1/2” x 3-1/8” [12x80]Ecofast 3/8” x 3-1/8” [10x80]

3-3/8” [87]

3-1/2” [89]

VG CSK 3/8” x 4” [10x100]4” [100]

Kombi 1/2” x 4” [12x100] Kombi 1/2” x 4” [12x100]4-1/8” [105]

4-3/4” [120] Kombi 1/2” x 4-3/4” [12x120] Kombi 1/2” x 4-3/4” [12x120]

5-ply

4” [100] Kombi 1/2” x 4” [12x100] Kombi 1/2” x 4” [12x100]

VG CSK 3/8” x 4” [10x100]

4-3/4” [120]

Kombi 1/2” x 4-3/4” [12x120] Kombi 1/2” x 4-3/4” [12x120]5-1/8” [131]

5-1/2” [139]

5-5/8” [143]

6-1/4” [160]

Kombi 1/2” x 6-1/4” [12x160] Kombi 1/2” x 6-1/4” [12x160] VG CSK 3/8” x 6-1/4” [10x160]6-7/8” [175]

7-1/8” [180]

7-7/8” [200]

7-ply

4-3/8” [111] Kombi 1/2” x 4” [12x100] Kombi 1/2” x 4” [12x100] VG CSK 3/8” x 4” [10x100]

7-1/2” [191]

Kombi 1/2” x 6-1/4” [12x160] Kombi 1/2” x 6-1/4” [12x160] VG CSK 3/8” x 6-1/4” [10x160]

7-3/4” [197]

8-3/8” [213]

8-5/8” [220]

9-5/8” [245]

13

14

BASIC FACTORED RESISTANCE VALUE PER ANCHOR (N’r)

Table 5, Basic Factored Resistance Value for Flat CLT Panel Rigging using Yoke 1T (N’r)

Floor/Roof CLT Panel Rigging

Rigging Device Relative Density Panel Thickness Fastener Designation Basic Factored

Resistance Value (N’r)

G in. [mm] in. [mm] lbs. kN Yoke 1T

0.42

3-1/8” [78]

Kombi

1/2” x 3-1/8” [12 x 80] 1,600 7.14” [100] 1/2” x 4” [12 x 100] 1,600 7.1

4-3/4” [120] 1/2” x 4-3/4” [12 x 120] 1,900 8.56-1/4” [160] 1/2” x 6-1/4” [12 x 160] 2,200 9.8

0.49

3-1/8” [78]

Kombi

1/2” x 3-1/8” [12 x 80] 2,100 9.34” [100] 1/2” x 4” [12 x 100] 2,100 9.3

4-3/4” [120] 1/2” x 4-3/4” [12 x 120] 2,150 9.66-1/4” [160] 1/2” x 6-1/4” [12 x 160] 2,200 9.8

Table 6, Basic Factored Resistance Value for Flat CLT Panel Rigging using Yoke 5T (N’r)

Rigging Device Relative Density Panel Thickness Fastener Designation

Basic Factored Resistance Value (N’r)

G in. [mm] in. [mm] lbs. kNYoke 5T

0.42

3-1/8” [78]

Kombi

1/2” x 3-1/8” [12 x 80] 2,800 12.54” [100] 1/2” x 4” [12 x 100] 2,800 12.5

4-3/4” [120] 1/2” x 4-3/4” [12 x 120] 3,900 17.36-1/4” [160] 1/2” x 6-1/4” [12 x 160] 7,000 31.1

0.49

3-1/8” [78]

Kombi

1/2” x 3-1/8” [12 x 80] 3,100 13.84” [100] 1/2” x 4” [12 x 100] 3,100 13.8

4-3/4” [120] 1/2” x 4-3/4” [12 x 120] 4,300 19.16-1/4” [160] 1/2” x 6-1/4” [12 x 160] 7,700 34.3

Notes: 1. Basic factored resistance values (N’r) listed are only valid for limit state design in Canada.2. Basic factored resistance values (N’r) listed need to be factored with appropriate reduction factors (RAR ; RLS ; RD) given on page 12.3. Basic factored resistance values (N’r) listed are valid for a minimum sling angle to the panel (β) of 60°.4. Basic factored resistance values (N’r) listed are only valid with listed ASSY® screws. 5. The resistance of ASSY® screws can only be assured for a single use. New screws are to be used for each lift.6. The right ASSY® screw length should be chosen to penetrate panel plies to the largest extent possible, refer to p.13.7. The maximum installation torque of ASSY® screws shall not exceed the fastener torsional strength given in Table 1.

Notes: See notes under table 6

15

Table 7, Basic Factored Resistance Value for Flat CLT Panel Rigging using Yoke XL (N’r)



G in. [mm] in. [mm] lbs. kNYoke XL ; 4 screws

0.423-1/8” [78] Ecofast 3/8” x 3-1/8” [10 x 80] 2,300 10.2

4” [100]VG CSK

3/8” x 4” [10 x 100] 3,500 15.66-1/4” [160] 3/8” x 6-1/4” [10 x 160] 6,300 28.0

0.493-1/8” [78] Ecofast 3/8” x 3-1/8” [10 x 80] 2,500 11.1

4” [100]VG CSK

3/8” x 4” [10 x 100] 4,000 17.86-1/4” [160] 3/8” x 6-1/4” [10 x 160] 7,000 31.1




0.423-1/8” [78] Ecofast 3/8” x 3-1/8” [10 x 80] 4,300 19.1

4” [100]VG CSK

3/8” x 4” [10 x 100] 6,700 29.86-1/4” [160] 3/8” x 6-1/4” [10 x 160] 10,100 44.9

0.493-1/8” [78] Ecofast 3/8” x 3-1/8” [10 x 80] 4,800 21.4

4” [100]VG CSK

3/8” x 4” [10 x 100] 7,600 33.86-1/4” [160] 3/8” x 6-1/4” [10 x 160] 10,500 46.7




0.423-1/8” [78] Ecofast 3/8” x 3-1/8” [10 x 80] 6,600 29.4

4” [100]VG CSK

3/8” x 4” [10 x 100] 10,400 46.36-1/4” [160] 3/8” x 6-1/4” [10 x 160] 10,900 48.5

0.493-1/8” [78] Ecofast 3/8” x 3-1/8” [10 x 80] 7,300 32.5

4” [100]VG CSK

3/8” x 4” [10 x 100] 10,600 47.26-1/4” [160] 3/8” x 6-1/4” [10 x 160] 11,000 48.9


Notes: 1. Basic factored resistance values (N’r) listed are only valid for limit state design in Canada.2. Basic factored resistance values (N’r) listed need to be factored with appropriate reduction factors (RAR ; RLS ; RD) given on page 12.3. Basic factored resistance values (N’r) listed are valid for a minimum sling angle to the panel (β) of 60°.4. Basic factored resistance values (N’r) listed are only valid with listed ASSY® screws. 5. The resistance of ASSY® screws can only be assured for a single use. New screws are to be used for each lift.6. The right ASSY® screw length should be chosen to penetrate panel plies to the largest extent possible, refer to p.13.7. The maximum installation torque of ASSY® screws shall not exceed the fastener torsional strength given in Table 1.

16

Wall CLT Panel Rigging

Table 8, Basic Factored Resistance Value for Wall CLT Panel Rigging using Yoke XL (N’r)

Rigging Device Relative Density Min Panel Thickness Fastener Designation



0.42 3-1/2” [87] VG CSK 3/8” x 6-1/4” [10 x 160] 1,400 6.2

0.49 3-1/2” [87] VG CSK 3/8” x 6-1/4” [10 x 160] 1,550 6.9

Tabulated basic factored resistance values in the wall CLT panel rigging section are designed to allow the panel to be tilted up, as shown below.

Notes: 1. Basic factored resistance values (N’r) listed are only valid for limit state design in Canada.2. Basic factored resistance values (N’r) listed account for tilting up the panel during the rigging process.3. Basic factored resistance values (N’r) listed are only valid with listed ASSY® screws. 4. The capacity of the anchors (Nr) must be greater than half the factored total load (1/2∙Wf) as shown below.5. The resistance of ASSY® screws can only be assured for a single use. New screws are to be used for each lift.6. The maximum installation torque of ASSY® screws shall not exceed the fastener torsional strength given in Table 1.7. If splitting is observed, immediately stop the rigging operations and contact a licensed design professional.

Nr

½ ∙ Wf

½ ∙ Wf

17

Glulam Beam Rigging

Table 9, Basic Factored Resistance Value for Glulam Beam Rigging using Yoke 1T (N’r)

Rigging Device Relative Density Min Beam Width Fastener Designation


G in. [mm] in. [mm] lbs. kNYoke 1T

0.42 6-5/8” [168] Kombi1/2” x 4-3/4” [12 x 120] 1,900 8.51/2” x 6-1/4” [12 x 160] 2,200 9.8

0.49 6-5/8” [168] Kombi1/2 x 4-3/4” [12 x 120] 2,150 9.61/2 x 6-1/4” [12 x 160] 2,200 9.8

Table 10, Basic Factored Resistance Value for Glulam Beam Rigging using Yoke XL (N’r)




0.42 5-1/8” [130] VG CSK3/8” x 4” [10 x 100] 3,500 15.6

3/8” x 6-1/4” [10 x 160] 6,300 28.0

0.49 5-1/8” [130] VG CSK3/8” x 4” [10 x 100] 4,000 17.8

3/8” x 6-1/4” [10 x 160] 7,000 31.1




0.42 5-1/8” [130] VG CSK3/8” x 4” [10 x 100] 6,700 29.8

3/8” x 6-1/4” [10 x 160] 10,100 44.9

0.49 5-1/8” [130] VG CSK3/8” x 4” [10 x 100] 7,600 33.8

3/8” x 6-1/4” [10 x 160] 10,500 46.7




0.42 5-1/8” [130] VG CSK3/8” x 4” [10 x 100] 10,400 46.3

3/8” x 6-1/4” [10 x 160] 10,900 48.5

0.49 5-1/8” [130] VG CSK3/8” x 4” [10 x 100] 10,600 47.2

3/8” x 6-1/4” [10 x 160] 11,000 48.9

Notes: See notes under table 10

Notes: 1. Basic factored resistance values (N’r) listed are only valid for limit state design in Canada.2. Basic factored resistance values (N’r) listed need to be factored with appropriate reduction factors (RAR ; RLS ; RD) given on page 12.3. Basic factored resistance values (N’r) listed are valid for a minimum sling angle to the panel (β) of 60°.4. Basic factored resistance values (N’r) listed are only valid with listed ASSY® screws. 5. The resistance of ASSY® screws can only be assured for a single use. New screws are to be used for each lift.6. The right ASSY® screw length should be chosen to penetrate glulam plies to the largest extent possible, refer to p.13.7. The maximum installation torque of ASSY® screws shall not exceed the fastener torsional strength given in Table 1.

18

SLING INSTALLATIONSling AngleTabulated basic factored resistance values (N’r) are valid for rigging scenarios with a minimum sling angle (β) measured between the sling and the panel surface of 60°. For cases where the sling angle is less than 60°, an appropriate reduction factor (RAR) needs to be applied. Additionally, the angle (λ) measured between the vertical and the sling, must be smaller than 30° to avoid excessive forces in the slings.

S

L

β

Did you know?

If S is greater than L, then the angle (λ) measured between the vertical and the sling is smaller than 30°.

λ

β

λ

S

L

Special attention to angles must be given for angled panel rigging scenarios. For cases where one of the sling angles (β) is less than 60°, an appropriate reduction factor (RAR) needs to be applied to the capacity of the anchors (Nr). The following figures demonstrate an example of a rigging scenario with a panel angled by 15°.

15°

50°25°

75°

30°

19

Load Spreading When using more than two anchors, it is important to ensure that uneven load sharing does not occur. Without an adequate load spreader/compensation system, only two slings may carry the entire load, with the remaining slings hanging slack. In such cases, a reduction factor RLS = 0.5 needs to be considered.

When using load spreader/compensation devices as seen below, even load share may be assumed.

For CLT wall panel rigging, load spreaders can be used to further stabilize the load while increasing the sling angle (β).

20

END AND EDGE DISTANCE REQUIREMENTSCertain end and edge distance requirements have to be followed when installing Yokes to avoid splitting of the wood. Rigging devices should always be placed in symmetrical manner and in line (parallel) with the sling to promote even load sharing, while stabilizing the rigged material.


Provided requirements are a minimum and can be adjusted to specific site conditions. Anchors should be placed in accordance with allowable panel span in order to avoid excessive bending during lifting.

[270 mm]10 - 5/8”

[270 mm]10 - 5/8”

[270 mm]10 - 5/8”

[150

mm

]5-

7/8”

[150

mm

]5-

7/8”

[150 mm

]5-7/8”

21

Did you know?

For repetitive lifts, a jig can be made to assure correct and efficient placement and even load share between the rigging hardware.

Glulam Beam Rigging

When rigging glulam beams, the minimum end and edge distances are as follows:

Wall CLT Panel Rigging

For wall panel rigging in the narrow edge of the CLT the specifically designed Yoke XL (which uses smaller diameter fasteners) can be used. The reduced edge distance requirements below are a minimum, and apply to the Yoke XL only.

[270 mm]10 - 5/8”

[270 mm]10 - 5/8”

[270 mm]10 - 5/8”

[50 mm

]2”

[32 mm

]1-1/4”

[84

mm

]3

- 5/1

6”

22

RECOMMENDED WORKFLOWThe high level of prefabrication of mass timber building elements means that installation can be fast and efficient. Trucks are generally loaded in the correct sequence, meaning every panel element is delivered in place just in time. Therefore, it is crucial to keep up with a similarly efficient material workflow on site by steadily unloading truck beds and maximizing crane efficiency. It is usually recommended to use 4 sets of rigging hardware: while one set is installed on the panel on the truck bed (1), one is used for rigging a panel into place (2), another one is demounted from a readily installed panel (3), and the other set is transported back to the truck (4). With this circular workflow, delays on site can be minimized.

1 2

3 4

23

Material Weight:

Is the material weight given (and is it correct)?

Is the load factored up with correct modification factors?

Dead load factor

Dynamic acceleration factor (refer to respective standards)

Optional safety factor

Rigging Hardware:

Is the capacity per anchor enough to lift the material?

Is the angle (β) measured between the sling and the panel surface greater than 60°?

Is the angle (λ) measured between the vertical and the sling smaller than 30°?

Is the load rating of the slings greater than the angled force component?

Is the correct fastener length used?

Is the fastener new? Fasteners should only be used for one rigging application!

Device Placement:

Are end and edge distance requirements satisfied?

Is even load sharing between the anchors assured?

Is the center of gravity below the upper pick point of the crane?

Rigging:

Is all rigging hardware installed properly and double checked?

Is the surrounding area clear and safe?

Is the rigging element secured with tag lines?

Does the current wind condition allow for safe rigging?

Is the intended location prepared to accept the rigged material?

Releasing:

Is the panel fully secured with no load on the rigging slings anymore?

Are used fasteners disposed of correctly to avoid reuse for rigging applications?

CHECK LIST

WOOD you like to CONNECT?

Contact [email protected]

Technical [email protected]

MyTiCon Timber Connectors1-8287, 124th Street, Surrey, BC, Canada, V3W 9G2

www.myticon.com

We strive to provide sustainable, high-quality mass-timber and heavy-timber connection solutions to a rapidly evolving and thriving industry. We drive innovation through certified research and development and contribute our part to the education of young talent and experienced professionals. Please contact our team to arrange a free Remote Learning Session on Modern Timber Connection Systems at:

[email protected]

For all our technical resources, visit:

www.myticon.com/resources.

Documents

MTC Solutions formerly MyTiCon - Rigging Design Guide...material handling procedures conducted with the system outlined in this document are to be approved by a qualified design professional