Page 1 of 12 DSEN 1995-1-1 DK NA2011

DSEN 1995-1-1 DK NA2011

National Annex to

Eurocode 5 Design of timber structures ndash

Part 1-1 General - Common rules and rules for buildings _______________________________________________________________________

Foreword

This national annex (NA) is a revision of DSEN 1995-1-1 DK NA2010-05 In addition to minor

editorial changes and a clarification of clause 42 and Table 72 new complementary information

on wood-based panels for structural roofs floors and walls has been added This NA entered into

force on 2011-12-15 and has replaced DSEN 1995-1-1 DK NA2010-05 and DSEN

13986NA2007

Previous versions addenda and an overview of all National Annexes can be found at

wwweurocodesdk

This national Annex (NA) lays down the conditions for the implementation in Denmark of this Eu-

rocode for construction works in conformity with the Danish Building Act or the building legisla-

tion Other parties can put this NA into effect by referring thereto

This NA specifies the national choices prescribed in Denmark

The national choices may be in the form of nationally applicable values an option between methods

given in the Eurocode or the addition of complementary guidance

This NA includes

an overview of possible national choices and complementary information

national choices

complementary (non-contradictory) information which may assist the user of the Eu-

rocode

The numbering refers to the clauses where choices are allowed andor complementary information

is given To the extent possible the headingsubject is identical to the heading of the clause but as

references are at a more detailed level that the headings the headingsubject has in several cases

been made more explicit

Page 2 of 12 DSEN 1995-1-1 DK NA2011

Overview of possible national choices and complementary information

The list below identifies the clauses where national choices are possible and the applicablenot ap-

plicable informative annexes Furthermore clauses providing complementary information are iden-

tified Complementary information is given at the end of this document

Clause Subject National choice

Complementary information

2312(2)P Load-duration classes

National choice

2313(1)P Service classes National choice

241(1)P Design value of material prop-

erty

National choice

Complementary information

42 Resistance to corrosion Complementary information

617(2) Shear National choice

643(8) Double tapered curved and

pitched cambered beams

National choice

72(2) Limiting values for deflections of

beams

National choice

733(2) Vibrations - Residential floors National choice

8312(4) Nailed timber-to-timber connec-

tions Nails in end grain

National choice

8312(7) Nailed timber-to-timber connec-

tions Species sensitive to splitting

National choice

922(4) Trusses with punched metal plate

fasteners ndash Minimum overlap

Complementary information

9241(7) Wall diaphragms - General National choice

9253(1) Bracing of beam or truss sys-

tems

National choice

Complementary information

1092(3) Special rules for trusses with

punched metal plate fasteners

Erection maximum bow

National choice

Complementary information

1092(4) Special rules for trusses with

punched metal plate fasteners

Erection maximum deviation

National choice

Complementary information

Annex A Block shear and plug shear failure

at multiple dowel-type steel-to-

timber connections

Shall be applied

(normative)

Annex B Mechanically jointed beams Shall be applied

(normative)

Annex C Built-up columns Shall be applied

(normative)

Page 2 of 12 DSEN 1995-1-1 DK NA2011

Overview of possible national choices and complementary information

The list below identifies the clauses where national choices are possible and the applicablenot ap-

plicable informative annexes Furthermore clauses providing complementary information are iden-

tified Complementary information is given at the end of this document

Clause Subject National choice

Complementary information

2312(2)P Load-duration classes

National choice

2313(1)P Service classes National choice

241(1)P Design value of material prop-

erty

National choice

Complementary information

42 Resistance to corrosion Complementary information

617(2) Shear National choice

643(8) Double tapered curved and

pitched cambered beams

National choice

72(2) Limiting values for deflections of

beams

National choice

733(2) Vibrations - Residential floors National choice

8312(4) Nailed timber-to-timber connec-

tions Nails in end grain

National choice

8312(7) Nailed timber-to-timber connec-

tions Species sensitive to splitting

National choice

922(4) Trusses with punched metal plate

fasteners ndash Minimum overlap

Complementary information

9241(7) Wall diaphragms - General National choice

9253(1) Bracing of beam or truss sys-

tems

National choice

Complementary information

1092(3) Special rules for trusses with

punched metal plate fasteners

Erection maximum bow

National choice

Complementary information

1092(4) Special rules for trusses with

punched metal plate fasteners

Erection maximum deviation

National choice

Complementary information

Annex A Block shear and plug shear failure

at multiple dowel-type steel-to-

timber connections

Shall be applied

(normative)

Annex B Mechanically jointed beams Shall be applied

(normative)

Annex C Built-up columns Shall be applied

(normative)

Page 3 of 12 DSEN 1995-1-1 DK NA2011

Clarification of requirements for

materials

Complementary information

Prefabricated wall floor and roof

elements

Complementary information

Finger jointed structural timber Complementary information

Wood-based panels for structural

roofs floors and walls

Complementary information

Page 4 of 12 DSEN 1995-1-1 DK NA2011

National choices

2312(2)P Load-duration classes

Examples of assignment of actions to load-duration classes in Denmark appear from Table 22

Table 22 - Examples of load-duration assignment

Load-duration class Examples of loading

Permanent Self-weight

Long-term Silo action

Storage Category E see DSEN 1990

Medium-term Other variable actions

Short-term Snow loads

Variable loads on concrete forms

Variable loads on scaffolding and temporary

structures

Short-term forces due to temperature and mois-

ture exposure

Instantaneous Accidental loads

Wind actions

Impact forces including impact allowance

Random person loads (concentrated loads) on

roofs and similar loads

Mooring forces from ships

Short-term actions on quays

Braking and acceleration forces

Wave and ice pressures

2313(1)P Service classes

Examples of structures assigned to the service classes described in (2)P (3)P and (4)P

Service class 1

structures in heated buildings where moisture is not added to the air eg dwellings of-

fices and shops

Service class 2

structures in ventilated not permanently heated buildings eg weekend cottages un-

heated garages and storehouses

ventilated structures protected against precipitation eg ventilated roof structures

Page 4 of 12 DSEN 1995-1-1 DK NA2011

National choices

2312(2)P Load-duration classes

Examples of assignment of actions to load-duration classes in Denmark appear from Table 22

Table 22 - Examples of load-duration assignment

Load-duration class Examples of loading

Permanent Self-weight

Long-term Silo action

Storage Category E see DSEN 1990

Medium-term Other variable actions

Short-term Snow loads

Variable loads on concrete forms

Variable loads on scaffolding and temporary

structures

Short-term forces due to temperature and mois-

ture exposure

Instantaneous Accidental loads

Wind actions

Impact forces including impact allowance

Random person loads (concentrated loads) on

roofs and similar loads

Mooring forces from ships

Short-term actions on quays

Braking and acceleration forces

Wave and ice pressures

2313(1)P Service classes

Examples of structures assigned to the service classes described in (2)P (3)P and (4)P

Service class 1

structures in heated buildings where moisture is not added to the air eg dwellings of-

fices and shops

Service class 2

structures in ventilated not permanently heated buildings eg weekend cottages un-

heated garages and storehouses

ventilated structures protected against precipitation eg ventilated roof structures

Page 5 of 12 DSEN 1995-1-1 DK NA2011

Service class 3

structures in moist rooms

structures exposed to precipitation or water including concrete forms and outdoor scaf-

folding

timber frames for felted roofs if these are not designed in such a way that they may be

assigned to Service class 2

241 (1)P Design value of material property

Instead of Table 23 in EN 1995-1-1 the following is used

Table 23 ndash Partial factors (γM) for the ultimate limit state for material properties and re-

sistances

Persistent and transient design situations

Glued laminated timber LVL and panels γM = 130 γ3

Solid timber γM = 135 γ3

Dowel-type fasteners eg nails screws bolts dowels γM = 135 γ3

Glued joints including glued-in bolts γM = 150 γ3

Connections made with punched metal plate fasteners γM = 135 γ3

Accidental design situation γM = 100

NOTE See also the complementary (non-contradictory) information

617(2) Shear

kcr = 10 is applied for all wood materials

643(8) Double tapered curved and pitched cambered beams

Expression (655) is used

72(2) Limiting values for deflections of beams

The table below specifies the recommended values The client may specify other values higher or

lower

Page 6 of 12 DSEN 1995-1-1 DK NA2011

Table 72 Examples of limiting values for deflections of beams

Deflections which normally secure satisfactory deformation conditions for simply supported struc-

tures of service classes 1 and 2 For cantilevered structures the deflection should be only half of the

values given

Action winst wfin1)

Roof structures Self-weight structures without camber l400

dwellings and offices Self-weight structures with camber 2)

l250

Characteristic snow loads l400

Characteristic wind actions l250

Floor structures

in residential multi-storey buildings Concentrated load 1 kN 17 mm

in single family houses Uniformly distributed load 15 kNm2

l600

1 wfin is calculated according to 223(5)

2 Provided that the camber is at least 80 of wfin

733(2) Vibrations - Residential floors

The recommendation in the note regarding a and b should be followed for residential floors it is

recommended however to use only that part of the curve in Figure 72 where a 2 mmkN Expe-

rience has shown that satisfactory vibration conditions for conventional timber beams having spans

up to 6 m are achieved when the deflection requirements of Table 72 are fulfilled

For floors within the same dwelling relaxed vibration requirements may be applied Experience has

shown that satisfactory vibration conditions for conventional timber beams having spans up to 5 m

are achieved when the deflection requirements of Table 72 are fulfilled

8312(4) Nailed timber-to-timber connections Nails in end grain

The alternative in 8312(3) may be applied but not however for smooth nails

8312(7) Nailed timber-to-timber connections Species sensitive to splitting

Addition

For timber with a moisture content less than 10 at the time of erection the recommendation in EN

1995-1-1 should be observed

Predrilling may be omitted for wood with a moisture content larger than 10 when d lt 5 mm

9241(7) Wall diaphragms ndash General

Both methods may be applied

9253(1) Bracing of beam or truss systems Modification factors

The following Danish modification factors in Table 92 for the determination of stiffness and re-

sistance of stabilising structures are recommended

Page 6 of 12 DSEN 1995-1-1 DK NA2011

Table 72 Examples of limiting values for deflections of beams

Deflections which normally secure satisfactory deformation conditions for simply supported struc-

tures of service classes 1 and 2 For cantilevered structures the deflection should be only half of the

values given

Action winst wfin1)

Roof structures Self-weight structures without camber l400

dwellings and offices Self-weight structures with camber 2)

l250

Characteristic snow loads l400

Characteristic wind actions l250

Floor structures

in residential multi-storey buildings Concentrated load 1 kN 17 mm

in single family houses Uniformly distributed load 15 kNm2

l600

1 wfin is calculated according to 223(5)

2 Provided that the camber is at least 80 of wfin

733(2) Vibrations - Residential floors

The recommendation in the note regarding a and b should be followed for residential floors it is

recommended however to use only that part of the curve in Figure 72 where a 2 mmkN Expe-

rience has shown that satisfactory vibration conditions for conventional timber beams having spans

up to 6 m are achieved when the deflection requirements of Table 72 are fulfilled

For floors within the same dwelling relaxed vibration requirements may be applied Experience has

shown that satisfactory vibration conditions for conventional timber beams having spans up to 5 m

are achieved when the deflection requirements of Table 72 are fulfilled

8312(4) Nailed timber-to-timber connections Nails in end grain

The alternative in 8312(3) may be applied but not however for smooth nails

8312(7) Nailed timber-to-timber connections Species sensitive to splitting

Addition

For timber with a moisture content less than 10 at the time of erection the recommendation in EN

1995-1-1 should be observed

Predrilling may be omitted for wood with a moisture content larger than 10 when d lt 5 mm

9241(7) Wall diaphragms ndash General

Both methods may be applied

9253(1) Bracing of beam or truss systems Modification factors

The following Danish modification factors in Table 92 for the determination of stiffness and re-

sistance of stabilising structures are recommended

Page 7 of 12 DSEN 1995-1-1 DK NA2011

Table 92

Factor Value

ks 30

kf1 80

kf2 100

kf3 50 NOTE See also the complementary (non-contradictory) information

1092(3) Special rules for trusses with punched metal plate fasteners Maximum bow

abowperm le 10 mm

NOTE See also the complementary (non-contradictory) information

1092(4) Special rules for trusses with punched metal plate fasteners Maximum deviation

from true vertical alignment

adev perm le 10 mm

NOTE See also the complementary (non-contradictory) information

Page 8 of 12 DSEN 1995-1-1 DK NA2011

Complementary (non-conflicting) information

241 (1)P Design value of material property The partial factors in Table 23 have been determined in accordance with Annex F in EN 1990 DK

NA

γM = γ1 γ2 γ3 γ4 where

γ1 takes into account the type of failure

γ2 takes into account the uncertainty related to the design model

γ3 takes into account the level of inspection

γ4 takes into account the variation of the strength parameter or resistance

When determining γ1 the following types of failure have been assumed

Glued laminated timber LVL and panels Warning of failure without re-

serve resistance

Solid timber Warning of failure without re-

serve resistance

Connections with metal fasteners Warning of failure without re-

serve resistance

Glued joints No warning

Connections made with punched metal plate fasten-

ers

Warning of failure without re-

serve resistance

With respect to the determination of γ3 factory-made composite members subject to external in-

spection such as structural timber elements and prefabricated timber members made with punched

metal plate fasteners may be assigned to the tightened inspection level

The following values of γ3 depending on the level of inspection are used

Sub-partial factor 3 depending on the extent of inspection

Inspection level Tightened Normal Reduced

γ3 095 10 110

42 (2) Resistance to corrosion ndash Table 41 (Addition)

Footnote a in Table 41 specifies Z275 and Z350 according to EN 10147 as alternatives to FeZn

12C and FeZn 25C respectively EN 10147 applies to hot-dip zinc coated steel sheet and pre-

scribes a quantity of zinc taken as the total quantity on both sides of the plates This is not a suitable

criterion for dowel-type fasteners

The coating thickness for Z275 and Z 350 can be calculated to be at least 39 microm and at least 49 microm

respectively and for plates coating thicknesses of 20 microm and 25 microm respectively are achieved at

each side of the steel plate When hot-dip galvanizing dowel-type fasteners it is recommended to

replace the expression FeZn 12C by a zinc coating thickness of at least 39 μm and the expression

Page 9 of 12 DSEN 1995-1-1 DK NA2011

FeZn 25C by a zinc coating thickness of at least 49 μm both thickness values being in accordance

with EN ISO 1461

922(4) Trusses with punched metal plate fasteners ndash Minimum overlap

Where a punched metal plate fastener is utilized to no more than 80 of its load-bearing capacity

the requirement for a minimum overlap of one third of the height of the timber member may be dis-

regarded It shall be verified that the timber is not subject to splitting

NOTE This guidance is based on the Danish requirements for increased insulation thicknesses and the associated in-

creased timber dimensions

9253 Bracing of beam or truss systems Modification factors

Where at least 8 equal closely spaced solid timber members in compression are supported by close-

ly spaced transverse bracings eg braced by battens half of the bending stiffness and the bending

strength of the timber members may be used to resist and transfer qd

For less than 8 members n16 of the bending stiffness and the bending strength may be used

When calculating qd in expression (937) the following may be used instead of n

[ radic ]

The accumulated force Fakku in the transverse bracing member supporting n members in compres-

sion may be taken as

[radic ]

where Fd is the design stabilising force according to expression (935)

1092(3) Special rules for trusses with punched metal plate fasteners Erection maximum

bow

For spans l gt 5 m abowperm may be increased to plusmn l500 with a maximum of plusmn 45 mm where l is the

maximum horizontal dimension and abow is measured in relation to the erection plane aimed at see

figure 1092 a) The local deflection measured with a 3 m straightedge shall in no place exceed 15

mm

1092(4) Special rules for trusses with punched metal plate fasteners Erection maximum

deviation

For structure heights gt1 m adevperm may be increased to h100 with a maximum of 45 mm where h

is the height of the structure of the vertical plane considered and adev is measured as the local dif-

ference between the deflection at the top and bottom in this plane see figure 1092 b) Furthermore

for l gt 14 m the deviation in any point from the erection plane aimed at shall be no more than

adevperm see Figure 1092 c)

Page 10 of 12 DSEN 1995-1-1 DK NA2011

Figure 1092 - Erection tolerances for trusses with punched metal plate fasteners

Clarification of requirements for materials

In order to secure continuity until the requirement for CE marking has become mandatory and to

ensure integrity of the Eurocode system the following products

finger-jointed structural timber (prEN 15497)

timber elements (prEN 14732-1)

shall be either

CE marked when the transition period begins for the relevant DSEN standard

or

manufactured according to the requirements of Annex ZA of the relevant standard and the

manufactureproduct shall be certified to the requirements of Annex ZA The certification

body and the testing laboratory shall be either notified or accredited for the relevant stand-

ards

NOTE When the transition period for a European harmonised standard expires a notified testing or certification body

should be used depending on the system for attestation of conformity Danish bodies must fulfil the requirements of

Executive Order No 229 of 31032001 rsquoExecutive order on the designation and notification of approved bodies for

certification inspection and testing tasks pursuant to EC Directive on construction products (89106EEC)rsquo published

by the Danish Enterprise and Construction Authority

Addition regarding

Prefabricated wall floor and roof elements

Until the harmonized standard for timber elements is available as an EN for CE marking prEN

14732-12006 Timber structures mdash Prefabricated wall floor and roof elements ndash Product require-

ments shall be used with the following exceptions amendments and clarifications as the basis of

certification for the inspection or certification schemes

Page 11 of 12 DSEN 1995-1-1 DK NA2011

Amendments

clause ZA22 Elements under attestation of conformity system 1 (adhesively bonded elements

and mechanically fixed elements in reaction to fire Classes (A1 ndash C)a)

Until EN 14732-1 enters into force at least one FPC inspection shall be carried out per year

clause ZA23 Elements under attestation of conformity system 2+ (mechanically fixed ele-

ments)

Until EN 14732-1 enters into force at least one FPC inspection shall be carried out per year

Exceptions

The following clauses are replaced by the certificate and marking rules of the inspection or certifi-

cation scheme

- ZA24 EC Certificate and Declaration of conformity

- ZA3 CE marking and labelling

Clarification

prEN 14732-12006 specifies performance requirements for prefabricated structural (load-bearing)

wall floor and roof elements consisting of framing members of wood andor wood based materials

and one or both sided panels or boards connected to the joists by suitable adhesive bonding or me-

chanical fixing The cavities of the elements may be filled entirely or partially with insulating mate-

rials The exterior faces of the panels or boards may also be covered with insulation material This

standard applies to elements which require but do not include an external finishing layer when in-

stalled such as brickwork or a roof covering The standard also covers volume elements (boxes

attics and bays) of prefabricated structural wall floor and roof elements assembled at the factory

The standard does not apply to elements incorporation doors windows and services (cables water

mains etc) and their installation

prEN 14732-1 does not apply to industrially manufactured timber house systemsbuilding kits mar-

keted as buildings and made of pre-designed and prefabricated components intended for production

in series ETAG 007 rdquoTimber Frame Building Kitsrdquo applies to this type of kit

Addition regarding

Finger jointed structural timber

Until the harmonized standard for finger jointed structural timber is available as an EN for CE

marking prEN 154972006 Finger jointed structural timber ndash Performance requirements and min-

imum production requirements shall be used with the following exceptions and amendments as the

basis of certification for the inspection or certification schemes

Amendments

ZA21 System for attestation of conformity Until EN 15497 enters into force at least two FPC in-

spections shall be carried out per year

Exceptions

The following clauses are replaced by the certificate and marking rules of the inspection or certifi-

cation scheme

- ZA22 EC Certificate and Declaration of conformity

- ZA3 CE marking and labelling

Page 12 of 12 DSEN 1995-1-1 DK NA2011

Addition regarding

Wood-based panels for structural roofs floors and walls

The harmonised standard DSEN 139862004 Wood-based panels for use in construction - Charac-

teristics evaluation of conformity and marking makes reference to requirements specified in DSEN

128712010 Wood-based panels - Performance specifications and requirements for load bearing

boards for use in floors walls and roofs These requirements are amended as outlined below

The modified requirements correspond to the current Danish requirements which are based on the

previous Nordic requirements They also conform to the recommended requirements which are ex-

pected to become the result of revision of DSEN 13986 og DSEN 12871 in progress

Products already placed on the market may be used when the requirements included in DSEN

128712001 and DSEN 13986NA2007 have been fulfilled

Roofs and floors

The requirements specified in DSEN 128712010 clauses 61 62 and 64 shall be fulfilled with

the following changes

Expression (5) is not applied

Expression (6) is changed to

Expressions (7)-(10) are changed to Rm ge 6000tL [Nmm] where t and L are given in mm

Expression (11) is not applied

Expressions (12) and (13) are substituted by

where γM is determined according to normal inspection of material properties (γ3 = 1) and kmod is

used for the relevant load duration class and service category

For roofs with inclination α the span may be increased to L in relation to the span L determined

by testing for horizontal roofs (α = 0)

Lα = L cos α but no more than 13L

Panelled walls

The racking strength of structural and stiffening walls is determined according to DSEN 1995-1-1

by calculation or testing in accordance with DSEN 594 using load-bearing boards in conformity

with DSEN 13986

NOTE The requirement specified in DSEN 128712010 clause 63 is not to be verified and the

boards need not be marked Wall

Page 8 of 12 DSEN 1995-1-1 DK NA2011

Complementary (non-conflicting) information

241 (1)P Design value of material property The partial factors in Table 23 have been determined in accordance with Annex F in EN 1990 DK

NA

γM = γ1 γ2 γ3 γ4 where

γ1 takes into account the type of failure

γ2 takes into account the uncertainty related to the design model

γ3 takes into account the level of inspection

γ4 takes into account the variation of the strength parameter or resistance

When determining γ1 the following types of failure have been assumed

Glued laminated timber LVL and panels Warning of failure without re-

serve resistance

Solid timber Warning of failure without re-

serve resistance

Connections with metal fasteners Warning of failure without re-

serve resistance

Glued joints No warning

Connections made with punched metal plate fasten-

ers

Warning of failure without re-

serve resistance

With respect to the determination of γ3 factory-made composite members subject to external in-

spection such as structural timber elements and prefabricated timber members made with punched

metal plate fasteners may be assigned to the tightened inspection level

The following values of γ3 depending on the level of inspection are used

Sub-partial factor 3 depending on the extent of inspection

Inspection level Tightened Normal Reduced

γ3 095 10 110

42 (2) Resistance to corrosion ndash Table 41 (Addition)

Footnote a in Table 41 specifies Z275 and Z350 according to EN 10147 as alternatives to FeZn

12C and FeZn 25C respectively EN 10147 applies to hot-dip zinc coated steel sheet and pre-

scribes a quantity of zinc taken as the total quantity on both sides of the plates This is not a suitable

criterion for dowel-type fasteners

The coating thickness for Z275 and Z 350 can be calculated to be at least 39 microm and at least 49 microm

respectively and for plates coating thicknesses of 20 microm and 25 microm respectively are achieved at

each side of the steel plate When hot-dip galvanizing dowel-type fasteners it is recommended to

replace the expression FeZn 12C by a zinc coating thickness of at least 39 μm and the expression

Page 9 of 12 DSEN 1995-1-1 DK NA2011

FeZn 25C by a zinc coating thickness of at least 49 μm both thickness values being in accordance

with EN ISO 1461

922(4) Trusses with punched metal plate fasteners ndash Minimum overlap

Where a punched metal plate fastener is utilized to no more than 80 of its load-bearing capacity

the requirement for a minimum overlap of one third of the height of the timber member may be dis-

regarded It shall be verified that the timber is not subject to splitting

NOTE This guidance is based on the Danish requirements for increased insulation thicknesses and the associated in-

creased timber dimensions

9253 Bracing of beam or truss systems Modification factors

Where at least 8 equal closely spaced solid timber members in compression are supported by close-

ly spaced transverse bracings eg braced by battens half of the bending stiffness and the bending

strength of the timber members may be used to resist and transfer qd

For less than 8 members n16 of the bending stiffness and the bending strength may be used

When calculating qd in expression (937) the following may be used instead of n

[ radic ]

The accumulated force Fakku in the transverse bracing member supporting n members in compres-

sion may be taken as

[radic ]

where Fd is the design stabilising force according to expression (935)

1092(3) Special rules for trusses with punched metal plate fasteners Erection maximum

bow

For spans l gt 5 m abowperm may be increased to plusmn l500 with a maximum of plusmn 45 mm where l is the

maximum horizontal dimension and abow is measured in relation to the erection plane aimed at see

figure 1092 a) The local deflection measured with a 3 m straightedge shall in no place exceed 15

mm

1092(4) Special rules for trusses with punched metal plate fasteners Erection maximum

deviation

For structure heights gt1 m adevperm may be increased to h100 with a maximum of 45 mm where h

is the height of the structure of the vertical plane considered and adev is measured as the local dif-

ference between the deflection at the top and bottom in this plane see figure 1092 b) Furthermore

for l gt 14 m the deviation in any point from the erection plane aimed at shall be no more than

adevperm see Figure 1092 c)

Page 10 of 12 DSEN 1995-1-1 DK NA2011

Figure 1092 - Erection tolerances for trusses with punched metal plate fasteners

Clarification of requirements for materials

In order to secure continuity until the requirement for CE marking has become mandatory and to

ensure integrity of the Eurocode system the following products

finger-jointed structural timber (prEN 15497)

timber elements (prEN 14732-1)

shall be either

CE marked when the transition period begins for the relevant DSEN standard

or

manufactured according to the requirements of Annex ZA of the relevant standard and the

manufactureproduct shall be certified to the requirements of Annex ZA The certification

body and the testing laboratory shall be either notified or accredited for the relevant stand-

ards

NOTE When the transition period for a European harmonised standard expires a notified testing or certification body

should be used depending on the system for attestation of conformity Danish bodies must fulfil the requirements of

Executive Order No 229 of 31032001 rsquoExecutive order on the designation and notification of approved bodies for

certification inspection and testing tasks pursuant to EC Directive on construction products (89106EEC)rsquo published

by the Danish Enterprise and Construction Authority

Addition regarding

Prefabricated wall floor and roof elements

Until the harmonized standard for timber elements is available as an EN for CE marking prEN

14732-12006 Timber structures mdash Prefabricated wall floor and roof elements ndash Product require-

ments shall be used with the following exceptions amendments and clarifications as the basis of

certification for the inspection or certification schemes

Page 11 of 12 DSEN 1995-1-1 DK NA2011

Amendments

clause ZA22 Elements under attestation of conformity system 1 (adhesively bonded elements

and mechanically fixed elements in reaction to fire Classes (A1 ndash C)a)

Until EN 14732-1 enters into force at least one FPC inspection shall be carried out per year

clause ZA23 Elements under attestation of conformity system 2+ (mechanically fixed ele-

ments)

Until EN 14732-1 enters into force at least one FPC inspection shall be carried out per year

Exceptions

The following clauses are replaced by the certificate and marking rules of the inspection or certifi-

cation scheme

- ZA24 EC Certificate and Declaration of conformity

- ZA3 CE marking and labelling

Clarification

prEN 14732-12006 specifies performance requirements for prefabricated structural (load-bearing)

wall floor and roof elements consisting of framing members of wood andor wood based materials

and one or both sided panels or boards connected to the joists by suitable adhesive bonding or me-

chanical fixing The cavities of the elements may be filled entirely or partially with insulating mate-

rials The exterior faces of the panels or boards may also be covered with insulation material This

standard applies to elements which require but do not include an external finishing layer when in-

stalled such as brickwork or a roof covering The standard also covers volume elements (boxes

attics and bays) of prefabricated structural wall floor and roof elements assembled at the factory

The standard does not apply to elements incorporation doors windows and services (cables water

mains etc) and their installation

prEN 14732-1 does not apply to industrially manufactured timber house systemsbuilding kits mar-

keted as buildings and made of pre-designed and prefabricated components intended for production

in series ETAG 007 rdquoTimber Frame Building Kitsrdquo applies to this type of kit

Addition regarding

Finger jointed structural timber

Until the harmonized standard for finger jointed structural timber is available as an EN for CE

marking prEN 154972006 Finger jointed structural timber ndash Performance requirements and min-

imum production requirements shall be used with the following exceptions and amendments as the

basis of certification for the inspection or certification schemes

Amendments

ZA21 System for attestation of conformity Until EN 15497 enters into force at least two FPC in-

spections shall be carried out per year

Exceptions

The following clauses are replaced by the certificate and marking rules of the inspection or certifi-

cation scheme

- ZA22 EC Certificate and Declaration of conformity

- ZA3 CE marking and labelling

Page 12 of 12 DSEN 1995-1-1 DK NA2011

Addition regarding

Wood-based panels for structural roofs floors and walls

The harmonised standard DSEN 139862004 Wood-based panels for use in construction - Charac-

teristics evaluation of conformity and marking makes reference to requirements specified in DSEN

128712010 Wood-based panels - Performance specifications and requirements for load bearing

boards for use in floors walls and roofs These requirements are amended as outlined below

The modified requirements correspond to the current Danish requirements which are based on the

previous Nordic requirements They also conform to the recommended requirements which are ex-

pected to become the result of revision of DSEN 13986 og DSEN 12871 in progress

Products already placed on the market may be used when the requirements included in DSEN

128712001 and DSEN 13986NA2007 have been fulfilled

Roofs and floors

The requirements specified in DSEN 128712010 clauses 61 62 and 64 shall be fulfilled with

the following changes

Expression (5) is not applied

Expression (6) is changed to

Expressions (7)-(10) are changed to Rm ge 6000tL [Nmm] where t and L are given in mm

Expression (11) is not applied

Expressions (12) and (13) are substituted by

where γM is determined according to normal inspection of material properties (γ3 = 1) and kmod is

used for the relevant load duration class and service category

For roofs with inclination α the span may be increased to L in relation to the span L determined

by testing for horizontal roofs (α = 0)

Lα = L cos α but no more than 13L

Panelled walls

The racking strength of structural and stiffening walls is determined according to DSEN 1995-1-1

by calculation or testing in accordance with DSEN 594 using load-bearing boards in conformity

with DSEN 13986

NOTE The requirement specified in DSEN 128712010 clause 63 is not to be verified and the

boards need not be marked Wall

Page 9 of 12 DSEN 1995-1-1 DK NA2011

FeZn 25C by a zinc coating thickness of at least 49 μm both thickness values being in accordance

with EN ISO 1461

922(4) Trusses with punched metal plate fasteners ndash Minimum overlap

Where a punched metal plate fastener is utilized to no more than 80 of its load-bearing capacity

the requirement for a minimum overlap of one third of the height of the timber member may be dis-

regarded It shall be verified that the timber is not subject to splitting

NOTE This guidance is based on the Danish requirements for increased insulation thicknesses and the associated in-

creased timber dimensions

9253 Bracing of beam or truss systems Modification factors

Where at least 8 equal closely spaced solid timber members in compression are supported by close-

ly spaced transverse bracings eg braced by battens half of the bending stiffness and the bending

strength of the timber members may be used to resist and transfer qd

For less than 8 members n16 of the bending stiffness and the bending strength may be used

When calculating qd in expression (937) the following may be used instead of n

[ radic ]

The accumulated force Fakku in the transverse bracing member supporting n members in compres-

sion may be taken as

[radic ]

where Fd is the design stabilising force according to expression (935)

1092(3) Special rules for trusses with punched metal plate fasteners Erection maximum

bow

For spans l gt 5 m abowperm may be increased to plusmn l500 with a maximum of plusmn 45 mm where l is the

maximum horizontal dimension and abow is measured in relation to the erection plane aimed at see

figure 1092 a) The local deflection measured with a 3 m straightedge shall in no place exceed 15

mm

1092(4) Special rules for trusses with punched metal plate fasteners Erection maximum

deviation

For structure heights gt1 m adevperm may be increased to h100 with a maximum of 45 mm where h

is the height of the structure of the vertical plane considered and adev is measured as the local dif-

ference between the deflection at the top and bottom in this plane see figure 1092 b) Furthermore

for l gt 14 m the deviation in any point from the erection plane aimed at shall be no more than

adevperm see Figure 1092 c)

Page 10 of 12 DSEN 1995-1-1 DK NA2011

Figure 1092 - Erection tolerances for trusses with punched metal plate fasteners

Clarification of requirements for materials

In order to secure continuity until the requirement for CE marking has become mandatory and to

ensure integrity of the Eurocode system the following products

finger-jointed structural timber (prEN 15497)

timber elements (prEN 14732-1)

shall be either

CE marked when the transition period begins for the relevant DSEN standard

or

manufactured according to the requirements of Annex ZA of the relevant standard and the

manufactureproduct shall be certified to the requirements of Annex ZA The certification

body and the testing laboratory shall be either notified or accredited for the relevant stand-

ards

NOTE When the transition period for a European harmonised standard expires a notified testing or certification body

should be used depending on the system for attestation of conformity Danish bodies must fulfil the requirements of

Executive Order No 229 of 31032001 rsquoExecutive order on the designation and notification of approved bodies for

certification inspection and testing tasks pursuant to EC Directive on construction products (89106EEC)rsquo published

by the Danish Enterprise and Construction Authority

Addition regarding

Prefabricated wall floor and roof elements

Until the harmonized standard for timber elements is available as an EN for CE marking prEN

14732-12006 Timber structures mdash Prefabricated wall floor and roof elements ndash Product require-

ments shall be used with the following exceptions amendments and clarifications as the basis of

certification for the inspection or certification schemes

Page 11 of 12 DSEN 1995-1-1 DK NA2011

Amendments

clause ZA22 Elements under attestation of conformity system 1 (adhesively bonded elements

and mechanically fixed elements in reaction to fire Classes (A1 ndash C)a)

Until EN 14732-1 enters into force at least one FPC inspection shall be carried out per year

clause ZA23 Elements under attestation of conformity system 2+ (mechanically fixed ele-

ments)

Until EN 14732-1 enters into force at least one FPC inspection shall be carried out per year

Exceptions

The following clauses are replaced by the certificate and marking rules of the inspection or certifi-

cation scheme

- ZA24 EC Certificate and Declaration of conformity

- ZA3 CE marking and labelling

Clarification

prEN 14732-12006 specifies performance requirements for prefabricated structural (load-bearing)

wall floor and roof elements consisting of framing members of wood andor wood based materials

and one or both sided panels or boards connected to the joists by suitable adhesive bonding or me-

chanical fixing The cavities of the elements may be filled entirely or partially with insulating mate-

rials The exterior faces of the panels or boards may also be covered with insulation material This

standard applies to elements which require but do not include an external finishing layer when in-

stalled such as brickwork or a roof covering The standard also covers volume elements (boxes

attics and bays) of prefabricated structural wall floor and roof elements assembled at the factory

The standard does not apply to elements incorporation doors windows and services (cables water

mains etc) and their installation

prEN 14732-1 does not apply to industrially manufactured timber house systemsbuilding kits mar-

keted as buildings and made of pre-designed and prefabricated components intended for production

in series ETAG 007 rdquoTimber Frame Building Kitsrdquo applies to this type of kit

Addition regarding

Finger jointed structural timber

Until the harmonized standard for finger jointed structural timber is available as an EN for CE

marking prEN 154972006 Finger jointed structural timber ndash Performance requirements and min-

imum production requirements shall be used with the following exceptions and amendments as the

basis of certification for the inspection or certification schemes

Amendments

ZA21 System for attestation of conformity Until EN 15497 enters into force at least two FPC in-

spections shall be carried out per year

Exceptions

The following clauses are replaced by the certificate and marking rules of the inspection or certifi-

cation scheme

- ZA22 EC Certificate and Declaration of conformity

- ZA3 CE marking and labelling

Page 12 of 12 DSEN 1995-1-1 DK NA2011

Addition regarding

Wood-based panels for structural roofs floors and walls

The harmonised standard DSEN 139862004 Wood-based panels for use in construction - Charac-

teristics evaluation of conformity and marking makes reference to requirements specified in DSEN

128712010 Wood-based panels - Performance specifications and requirements for load bearing

boards for use in floors walls and roofs These requirements are amended as outlined below

The modified requirements correspond to the current Danish requirements which are based on the

previous Nordic requirements They also conform to the recommended requirements which are ex-

pected to become the result of revision of DSEN 13986 og DSEN 12871 in progress

Products already placed on the market may be used when the requirements included in DSEN

128712001 and DSEN 13986NA2007 have been fulfilled

Roofs and floors

The requirements specified in DSEN 128712010 clauses 61 62 and 64 shall be fulfilled with

the following changes

Expression (5) is not applied

Expression (6) is changed to

Expressions (7)-(10) are changed to Rm ge 6000tL [Nmm] where t and L are given in mm

Expression (11) is not applied

Expressions (12) and (13) are substituted by

where γM is determined according to normal inspection of material properties (γ3 = 1) and kmod is

used for the relevant load duration class and service category

For roofs with inclination α the span may be increased to L in relation to the span L determined

by testing for horizontal roofs (α = 0)

Lα = L cos α but no more than 13L

Panelled walls

The racking strength of structural and stiffening walls is determined according to DSEN 1995-1-1

by calculation or testing in accordance with DSEN 594 using load-bearing boards in conformity

with DSEN 13986

NOTE The requirement specified in DSEN 128712010 clause 63 is not to be verified and the

boards need not be marked Wall

Page 10 of 12 DSEN 1995-1-1 DK NA2011

Figure 1092 - Erection tolerances for trusses with punched metal plate fasteners

Clarification of requirements for materials

In order to secure continuity until the requirement for CE marking has become mandatory and to

ensure integrity of the Eurocode system the following products

finger-jointed structural timber (prEN 15497)

timber elements (prEN 14732-1)

shall be either

CE marked when the transition period begins for the relevant DSEN standard

or

manufactured according to the requirements of Annex ZA of the relevant standard and the

manufactureproduct shall be certified to the requirements of Annex ZA The certification

body and the testing laboratory shall be either notified or accredited for the relevant stand-

ards

NOTE When the transition period for a European harmonised standard expires a notified testing or certification body

should be used depending on the system for attestation of conformity Danish bodies must fulfil the requirements of

Executive Order No 229 of 31032001 rsquoExecutive order on the designation and notification of approved bodies for

certification inspection and testing tasks pursuant to EC Directive on construction products (89106EEC)rsquo published

by the Danish Enterprise and Construction Authority

Addition regarding

Prefabricated wall floor and roof elements

Until the harmonized standard for timber elements is available as an EN for CE marking prEN

14732-12006 Timber structures mdash Prefabricated wall floor and roof elements ndash Product require-

ments shall be used with the following exceptions amendments and clarifications as the basis of

certification for the inspection or certification schemes

Page 11 of 12 DSEN 1995-1-1 DK NA2011

Amendments

clause ZA22 Elements under attestation of conformity system 1 (adhesively bonded elements

and mechanically fixed elements in reaction to fire Classes (A1 ndash C)a)

Until EN 14732-1 enters into force at least one FPC inspection shall be carried out per year

clause ZA23 Elements under attestation of conformity system 2+ (mechanically fixed ele-

ments)

Until EN 14732-1 enters into force at least one FPC inspection shall be carried out per year

Exceptions

The following clauses are replaced by the certificate and marking rules of the inspection or certifi-

cation scheme

- ZA24 EC Certificate and Declaration of conformity

- ZA3 CE marking and labelling

Clarification

prEN 14732-12006 specifies performance requirements for prefabricated structural (load-bearing)

wall floor and roof elements consisting of framing members of wood andor wood based materials

and one or both sided panels or boards connected to the joists by suitable adhesive bonding or me-

chanical fixing The cavities of the elements may be filled entirely or partially with insulating mate-

rials The exterior faces of the panels or boards may also be covered with insulation material This

standard applies to elements which require but do not include an external finishing layer when in-

stalled such as brickwork or a roof covering The standard also covers volume elements (boxes

attics and bays) of prefabricated structural wall floor and roof elements assembled at the factory

The standard does not apply to elements incorporation doors windows and services (cables water

mains etc) and their installation

prEN 14732-1 does not apply to industrially manufactured timber house systemsbuilding kits mar-

keted as buildings and made of pre-designed and prefabricated components intended for production

in series ETAG 007 rdquoTimber Frame Building Kitsrdquo applies to this type of kit

Addition regarding

Finger jointed structural timber

Until the harmonized standard for finger jointed structural timber is available as an EN for CE

marking prEN 154972006 Finger jointed structural timber ndash Performance requirements and min-

imum production requirements shall be used with the following exceptions and amendments as the

basis of certification for the inspection or certification schemes

Amendments

ZA21 System for attestation of conformity Until EN 15497 enters into force at least two FPC in-

spections shall be carried out per year

Exceptions

The following clauses are replaced by the certificate and marking rules of the inspection or certifi-

cation scheme

- ZA22 EC Certificate and Declaration of conformity

- ZA3 CE marking and labelling

Page 12 of 12 DSEN 1995-1-1 DK NA2011

Addition regarding

Wood-based panels for structural roofs floors and walls

The harmonised standard DSEN 139862004 Wood-based panels for use in construction - Charac-

teristics evaluation of conformity and marking makes reference to requirements specified in DSEN

128712010 Wood-based panels - Performance specifications and requirements for load bearing

boards for use in floors walls and roofs These requirements are amended as outlined below

The modified requirements correspond to the current Danish requirements which are based on the

previous Nordic requirements They also conform to the recommended requirements which are ex-

pected to become the result of revision of DSEN 13986 og DSEN 12871 in progress

Products already placed on the market may be used when the requirements included in DSEN

128712001 and DSEN 13986NA2007 have been fulfilled

Roofs and floors

The requirements specified in DSEN 128712010 clauses 61 62 and 64 shall be fulfilled with

the following changes

Expression (5) is not applied

Expression (6) is changed to

Expressions (7)-(10) are changed to Rm ge 6000tL [Nmm] where t and L are given in mm

Expression (11) is not applied

Expressions (12) and (13) are substituted by

where γM is determined according to normal inspection of material properties (γ3 = 1) and kmod is

used for the relevant load duration class and service category

For roofs with inclination α the span may be increased to L in relation to the span L determined

by testing for horizontal roofs (α = 0)

Lα = L cos α but no more than 13L

Panelled walls

The racking strength of structural and stiffening walls is determined according to DSEN 1995-1-1

by calculation or testing in accordance with DSEN 594 using load-bearing boards in conformity

with DSEN 13986

NOTE The requirement specified in DSEN 128712010 clause 63 is not to be verified and the

boards need not be marked Wall

Page 11 of 12 DSEN 1995-1-1 DK NA2011

Amendments

clause ZA22 Elements under attestation of conformity system 1 (adhesively bonded elements

and mechanically fixed elements in reaction to fire Classes (A1 ndash C)a)

Until EN 14732-1 enters into force at least one FPC inspection shall be carried out per year

clause ZA23 Elements under attestation of conformity system 2+ (mechanically fixed ele-

ments)

Until EN 14732-1 enters into force at least one FPC inspection shall be carried out per year

Exceptions

The following clauses are replaced by the certificate and marking rules of the inspection or certifi-

cation scheme

- ZA24 EC Certificate and Declaration of conformity

- ZA3 CE marking and labelling

Clarification

prEN 14732-12006 specifies performance requirements for prefabricated structural (load-bearing)

wall floor and roof elements consisting of framing members of wood andor wood based materials

and one or both sided panels or boards connected to the joists by suitable adhesive bonding or me-

chanical fixing The cavities of the elements may be filled entirely or partially with insulating mate-

rials The exterior faces of the panels or boards may also be covered with insulation material This

standard applies to elements which require but do not include an external finishing layer when in-

stalled such as brickwork or a roof covering The standard also covers volume elements (boxes

attics and bays) of prefabricated structural wall floor and roof elements assembled at the factory

The standard does not apply to elements incorporation doors windows and services (cables water

mains etc) and their installation

prEN 14732-1 does not apply to industrially manufactured timber house systemsbuilding kits mar-

keted as buildings and made of pre-designed and prefabricated components intended for production

in series ETAG 007 rdquoTimber Frame Building Kitsrdquo applies to this type of kit

Addition regarding

Finger jointed structural timber

Until the harmonized standard for finger jointed structural timber is available as an EN for CE

marking prEN 154972006 Finger jointed structural timber ndash Performance requirements and min-

imum production requirements shall be used with the following exceptions and amendments as the

basis of certification for the inspection or certification schemes

Amendments

ZA21 System for attestation of conformity Until EN 15497 enters into force at least two FPC in-

spections shall be carried out per year

Exceptions

The following clauses are replaced by the certificate and marking rules of the inspection or certifi-

cation scheme

- ZA22 EC Certificate and Declaration of conformity

- ZA3 CE marking and labelling

Page 12 of 12 DSEN 1995-1-1 DK NA2011

Addition regarding

Wood-based panels for structural roofs floors and walls

The harmonised standard DSEN 139862004 Wood-based panels for use in construction - Charac-

teristics evaluation of conformity and marking makes reference to requirements specified in DSEN

128712010 Wood-based panels - Performance specifications and requirements for load bearing

boards for use in floors walls and roofs These requirements are amended as outlined below

The modified requirements correspond to the current Danish requirements which are based on the

previous Nordic requirements They also conform to the recommended requirements which are ex-

pected to become the result of revision of DSEN 13986 og DSEN 12871 in progress

Products already placed on the market may be used when the requirements included in DSEN

128712001 and DSEN 13986NA2007 have been fulfilled

Roofs and floors

The requirements specified in DSEN 128712010 clauses 61 62 and 64 shall be fulfilled with

the following changes

Expression (5) is not applied

Expression (6) is changed to

Expressions (7)-(10) are changed to Rm ge 6000tL [Nmm] where t and L are given in mm

Expression (11) is not applied

Expressions (12) and (13) are substituted by

where γM is determined according to normal inspection of material properties (γ3 = 1) and kmod is

used for the relevant load duration class and service category

For roofs with inclination α the span may be increased to L in relation to the span L determined

by testing for horizontal roofs (α = 0)

Lα = L cos α but no more than 13L

Panelled walls

The racking strength of structural and stiffening walls is determined according to DSEN 1995-1-1

by calculation or testing in accordance with DSEN 594 using load-bearing boards in conformity

with DSEN 13986

NOTE The requirement specified in DSEN 128712010 clause 63 is not to be verified and the

boards need not be marked Wall

Page 12 of 12 DSEN 1995-1-1 DK NA2011

Addition regarding

Wood-based panels for structural roofs floors and walls

The harmonised standard DSEN 139862004 Wood-based panels for use in construction - Charac-

teristics evaluation of conformity and marking makes reference to requirements specified in DSEN

128712010 Wood-based panels - Performance specifications and requirements for load bearing

boards for use in floors walls and roofs These requirements are amended as outlined below

The modified requirements correspond to the current Danish requirements which are based on the

previous Nordic requirements They also conform to the recommended requirements which are ex-

pected to become the result of revision of DSEN 13986 og DSEN 12871 in progress

Products already placed on the market may be used when the requirements included in DSEN

128712001 and DSEN 13986NA2007 have been fulfilled

Roofs and floors

The requirements specified in DSEN 128712010 clauses 61 62 and 64 shall be fulfilled with

the following changes

Expression (5) is not applied

Expression (6) is changed to

Expressions (7)-(10) are changed to Rm ge 6000tL [Nmm] where t and L are given in mm

Expression (11) is not applied

Expressions (12) and (13) are substituted by

where γM is determined according to normal inspection of material properties (γ3 = 1) and kmod is

used for the relevant load duration class and service category

For roofs with inclination α the span may be increased to L in relation to the span L determined

by testing for horizontal roofs (α = 0)

Lα = L cos α but no more than 13L

Panelled walls

The racking strength of structural and stiffening walls is determined according to DSEN 1995-1-1

by calculation or testing in accordance with DSEN 594 using load-bearing boards in conformity

with DSEN 13986

NOTE The requirement specified in DSEN 128712010 clause 63 is not to be verified and the

boards need not be marked Wall