european technical eta 04/0022 assessment of...

84, avenue Jean-Jaurès Champs-sur-Marne FR-77447 Marne-la-Vallée Cedex 2

Phone: + 33 (0)1 64 68 82 82 Fax: + 33 (0)1 60 05 70 37 Website: www.cstb.fr

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ETA 04/0022 of 23/02/2016 page 1 of 19

European Technical Assessment

ETA 04/0022 of 23/02/2016

English translation prepared by CSTB – Original version in French language

General Part

Technical Assessment Body issuing the European Technical Assessment:

Centre Scientifique et Technique du Bâtiment (CSTB) Trade name of the construction product Inopanne

Product family to which the construction product belongs

Product Area Code: 13 Structural timber products / Elements and ancillaries

Manufacturer

FRANCE POUTRES 2, rue Louis Blériot Z.A. FR-85190 VENANSAULT

Manufacturing plant(s) Usine FRANCE POUTRES 2, rue Louis Blériot Z.A. FR-85190 VENANSAULT

This European Technical Assessment contains

19 pages including 6 Annexes which form an integral part of this assessment.

This European Technical Assessment is issued in accordance with regulation (EU) No 305/2011, on the basis of

ETAG 011, edition January 2012, used as European Assessment Document (EAD)

This ETA replaces/amends/is a corrigendum to

ETA 04/0022 issued on 27/09/2015

http://www.cstb.fr/

http://www.eota.eu/

http://www.eota.eu/

ETA 04/0022 of 23/02/2016 page 2 of 19

Specific parts

1. Technical description of the product

Standard INOPANNE light-composite wood based I-beams are manufactured from finger-jointed timber flanges profiled, assembled and glued to a 30 to 38mm thick finger jointed timber web. Finger-jointing is processed in house at the I-beam production facility. For short lengths, flanges and or web may not be finger jointed.

Standard products are manufactured from a C24 graded timber, flanges and web being typically of identical grade. The web of standard products is 34mm thick.

Some standard INOPANNE sections are manufactured using laminated timber as bottom flange for visual applications. Laminated timber is of same grade as the timber used for the web or top flange.

The manufacturing process can accommodate other materials or grades, using the same and unique rout (flange-to-web) profile.

INOPANNE sections can also be manufactured with flanges made from:

- solid timber in accordance with EN 14081, possibly finger-jointed in accordance with EN 15497, of grades ranging from C18 to C35 per EN 338;

- Glulam or glued solid timber in accordance with EN 14080, of grades ranging from GL 24 to GL 32 (h or c);

- LVL in accordance with EN 14374, made from spruce, pine, southern pine or beech, all veneers oriented parallel;

- LSL (Laminated Strand Lumber) in accordance with CUAP 03.04/13, made from aspen (min 70%) and a mix of other hardwoods (max 30%);

and with webs of 30 to 38mm thickness made from:

- solid timber in accordance with EN 14081, possibly finger-jointed in accordance with EN 15497, of grades ranging from C18 to C35 per EN 338;

- LSL (Laminated Strand Lumber) in accordance with CUAP 03.04/13, made from aspen (min 70%) and a mix of other hardwoods (max 30%);

- 3-ply panels as cross-laminated timber per EN 16351 or solid wood panel SWP/2 per EN 13986 and EN 13353, made from spruce, pine or larch, meeting the requirements of Table 4.

Possible combinations are listed in Table 3. Further requirements on the components are presented in the next section.

2. Specification of the intended use(s) in accordance with the applicable

European Assessment Document (hereinafter EAD)

The INOPANNE I-Joists are intended to be used as load-bearing parts of building constructions. With regard to moisture behaviour of the product and type of glue, the use is possible in service classes 1 and 2 defined in Eurocode 5. The I-Joists have not been evaluated specifically for areas where they might support seismic actions.

The provisions made in this European Technical Assessment are based on an assumed intended working life of the I-Joists of 50 years. The indications given on the working life cannot be interpreted as a guarantee given by the producer, but are to be regarded only as a means for choosing the right products in relation to the expected economically reasonable working life of the works.

ETA 04/0022 of 23/02/2016 page 3 of 19

3. Performance of the product and references to the methods used for its

assessment

The standard INOPANNE I-Joists in the range covered by this ETA corresponds to the drawings and provisions given in Annex 1. The characteristic material values, dimensions and tolerances of the I-joists not indicated in Annexes 1, 2 shall correspond to the respective values laid down in the technical documentation of this European Technical Assessment. The mechanical properties of the standard I-Joists are given in Annexes 3. Specific methodology to determine design properties of non-standard I-Joists, including asymmetrical sections is applied for I-Joists:

- whose dimensions of the section are not included in the product range described in Table 2, but within the boundaries (minimum and maximum dimensions) covered by Table 3 (flange and web components) and Table 2 (minimum beam depth);

and/or

- manufactured using a different material and/or grades as listed in Table 3.

Design of INOPANNE is carried out according to EN 1995-1 or the applicable rules.

Each INOPANNE I-Joists is marked on the web with the product name (INOPANNE) in capital letters and the indication of the upper flange for installation.

3.1 Mechanical resistance and stability (BRW1)

The mechanical properties of the standard I-joists sections are given in Annex 3. The mechanical properties of the non-standard I-joists sections can be determined according to Annex 3 if the non-standard I-Joists meet the above conditions.

No performance determined (NPD) towards seismic action.

3.2 Safety in case of fire (BRW2)

The I-joists consist of materials classified to have reaction to fire Class D-s2,d0, or that declared in the relevant European technical Approval (e.g. for LSL).

No performance determined (NPD) for resistance to fire.

3.3 Hygiene, health and environment (BRW3)

Based on the declaration of the manufacturer, the joists do not contain harmful or dangerous substances as defined in the EU database, with exception of formaldehyde.

In addition to the specific clauses relating to dangerous substances contained in this European Technical Assessment, there may be other requirements applicable to the products falling within its scope (e.g. transposed European legislation and national laws, regulations and administrative provisions). In order to meet the provisions of the EU Construction Product Directive, these requirements need also to be complied with, when and where they apply.

3.4 Safety in use (BRW4)

Not relevant.

ETA 04/0022 of 23/02/2016 page 4 of 19

3.5 Protection against noise (BRW5)

Not relevant.

3.6 Energy economy and heat retention (BRW6)

The thermal conductivity for the web and flange material is 0,13 W/(m.K) according to EN 12524, or that declared in the relevant European technical Approval (e.g. for LSL). The natural density variation of the materials is taken into account in this value.

3.7 Aspects of durability, serviceability and identification

The one-component polyurethane adhesives used are of type I. The use is allowed in service classes 1 and 2 only and requires that joists are protected from excessive exposure to weathering.

Serviceability of the INOPANNE I-joists is understood as their ability to resist loads without unacceptable deformations.

4. Assessment and verification of constancy of performance (hereinafter AVCP)

system applied, with reference to its legal base

According to the decision 1999/92/EC of the European Commission of 21/1/1999 (OJ of the EC L 29 of 3/2/1999), the system of assessment and verification of constancy of performance given in the table below applied.

Product(s) Intended

use(s) Level(s) or class(es)

Attestation of

conformity

system(s)

Light composite

wood based beam

For structural

timber products

Reaction to fire class

and resistance to fire

classes according to

EN 13501-2

1

5. Technical details necessary for the implementation of the AVCP system, as

provided for in the applicable EAD

Technical details necessary for the implementation of the AVCP system are laid down in the control plan deposited at Centre Scientifique et Technique du Bâtiment.

Issued in Champs-sur-Marne on 23/02/2016

Charles BALOCHE, Assistant General Manager, Technical Manager

ETA 04/0022 of 23/02/2016 page 5 of 19

INOPANNE I-Joists cross-section

INOPANNE I-Joist with rectangular shaped bottom

flange

INOPANNE I-Joist with round shaped bottom flange

Rout (flange-to-web joint)

Table 1: Dimensional tolerances

Dimension Unit Tolerance

Total joist depth H [mm] -2 / +3

Total joist length l [mm] -10 / +10

Flange width bf [mm] -3 /+3

Flange depth hf [mm] -3 / +3

Web width bw [mm] -1 / +1

Web depth hw [mm] -3 / +3

INOPANNE I-Joists

ANNEX 1 (1/2)

of ETA 04/0022 Geometry: cross-sections and dimensional tolerances

ETA 04/0022 of 23/02/2016 page 6 of 19

Table 2: Dimensions of standard INOPANNE I-Joists ranges

Product range

Joist description Timber grade

Joist Depth

Top Flange Web Bottom Flange

Width Depth Thickness Free

depth Width Depth

H (mm)

bf,top (mm)

hf,top (mm)

bw (mm)

hw (mm)

bf,bot (mm)

hf,bot (mm)

INOSOL

INOPANNE 58x180 C24 180 58 50 34 80 (1) (1)

INOPANNE 70x180 C24 180 70 47 34 86 (1) (1)

INOPANNE 58x220 C24 220 58 50 34 120 (1) (1)

INOPANNE 70x220 C24 220 70 47 34 126 (1) (1)

INOPANNE 58x250 C24 250 58 50 34 150 (1) (1)

INOPANNE 70x250 C24 250 70 47 34 156 (1) (1)

INOPANNE 58x300 C24 300 58 50 34 200 (1) (1)

INOPANNE 94x300 C24 300 94 60 34 180 (1) (1)

INOPANNE 58x360 C24 360 58 80 34 200 (1) (1)

STANDARD

INOPANNE 70x275 C24 275 70 60 34 155 (1) (1)

INOPANNE 70x295 C24 295 70 60 34 175 (1) (1)

INOPANNE 70x329 C24 329 70 60 34 175 (1)

94

INOPANNE 70x343 C24 343 70 94 34 155 (1) (1)

INOPANNE 70x393 C24 393 70 94 34 205 (1) (1)

INOPANNE 94x393 C24 393 94 94 34 205 (1) (1)

INOPANNE 94x419 C24 419 94 94 34 205 (1)

120

INOPANNE 94x439 C24 439 94 94 34 225 (1)

120

INOPANNE 94x465 C24 465 94 120 34 225 (1) (1)

PRESTIGE

INOPANNE CC 350 C24 (3)

350 70 60 34 155 135 (3)

135 (3)


400 70 60 34 205 135 (3)

135 (3)


434 94 94 34 205 135 (3)

135 (3)


460 94 120 34 205 135 (3)

135 (3)


480 94 120 34 225 135 (3)

135 (3)

INOPANNE CCR 335(2)

C24 (3)

335 70 60 34 155 135 (3)

120 (3)

INOPANNE CCR 385(2)

C24 (3)

385 70 60 34 205 135 (3)

120 (3)

INOPANNE CCR 419(2)

C24 (3)

419 94 94 34 205 135 (3)

120 (3)

INOPANNE CCR 445(2)

C24 (3)

445 94 120 34 205 135 (3)

120 (3)

INOPANNE CCR 465(2)

C24 (3)

465 94 120 34 225 135 (3)

120 (3)

(1)

Bottom flange dimensions identical to top flange dimensions (2)

Bottom flange section is a round section (3)

Bottom flange manufactured from duo laminated timber of C24 grade

INOPANNE I-Joists

ANNEX 1 (2/2)

of ETA 04/0022 Geometry: cross-sections and dimensional tolerances

ETA 04/0022 of 23/02/2016 page 7 of 19

Flange or Web grade properties

E0,mean mean modulus of elasticity of timber grade [N/mm2]

G0,mean mean shear modulus of timber grade [N/mm2]

fm,0,k characteristic bending strength [N/mm2]

fc,0,k characteristic axial compression strength [N/mm2]

ft,0,k characteristic axial tension strength [N/mm2]

fv,0,k characteristic shear strength [N/mm2]

fc,90,k characteristic compression perp. strength [N/mm2]

Combinations

Table 3: Combinations of flange and web materials of INOPANNE beams

Flange Material Web Material

Solid timber (1)

3-ply panel (4)

LSL (3)

Material hf bf bw = 30 – 34mm bw = 32mm bw = 30 – 38mm

Solid timber (1)

50 – 120mm 58 – 120mm X X X

Glulam or glued solid timber (1)

120 – 135mm 58 – 135mm X X X

LVL (parallel veneers) (2)

38 – 90mm 58 – 140mm X

LSL (3)

38 – 90mm 58 – 140mm X

(1) Softwood species only (2) Spruce, Pine, Southern Pine or Beech only (3) Aspen (min 70%) and other hardwoods (max 30%) (4) Spruce, Pine or Larch

Solid timber

Softwood solid timber can be used as flange or web component for INOPANNE beams. Depending on the length of the manufactured beam, solid timber flange or web can be finger-jointed or not. Web component thickness is 34mm. Minimum flange depth shall be 47mm.

Incoming solid timber shall be CE marked in accordance with EN 14081, of grades ranging from C18 to C35 per EN 338. Strength and stiffness properties are these listed for the selected grade in EN 338. Finger-jointed timber is processed in-house and conforms to the requirements of EN 15497. When combining different grades of timber for the flange and the web, the grade of the flange shall always be equal or greater to that of the web.

INOPANNE I-Joists

ANNEX 2 (1/4)

of ETA 04/0022 Materials: combinations and characteristic strength values

ETA 04/0022 of 23/02/2016 page 8 of 19

Glulam or glued solid timber

Softwood glulam or glued solid timber can be used as flange material for INOPANNE beams. These products being available in lengths of 13.5m, which corresponds with the typical maximum length on INOPANNE beam, no finger-jointing is required. Large finger-jointed glulam or glued solid timber is not allowed for use in INOPANNE beams. Minimum flange depth shall be 47mm. Incoming glulam or glued solid timber shall be CE marked in accordance with EN 14080, of grades ranging from GL 24 to GL 32 (h or c). Strength and stiffness properties are these listed for the selected grade in EN 14080. When combining glulam or glued solid timber grade for the flange with a solid timber web, the grade of the flange shall always be equal or greater to that of the web.

LVL (parallel veneers)

LVL can be used as flange material for INOPANNE beams. LVL being available in lengths of 13.5m, which corresponds with the typical maximum length on INOPANNE beam, no finger-jointing is required. Minimum flange depth shall be 38mm. Incoming LVL shall be CE marked in accordance with EN 14374, with all veneers oriented parallel, and of a grade such as the mean MOE in bending is equal to or greater than 13 500 N/mm

2 in edge orientation respectively 12 500 N/mm

2 in

flat orientation. Strength and stiffness properties are these listed for the selected manufacturer/product and grade in its DOP and CE Certificate of constancy of performance. LVL made from spruce, southern pine or beech has been subject to rout (flange-to-web) shear resistance testing. Therefore, unless additional initial type testing of rout shear capacity is realised under the responsibility of the Notified Body in charge of continuous surveillance, LVL shall be of spruce, pine, southern pine or beech only.

LSL (Laminated Strand Lumber)

LSL can be used as flange or web material for INOPANNE beams. LSL being available in lengths of 13.5m, which corresponds with the typical maximum length on INOPANNE beam, no finger-jointing is required. Web component thickness is 30 to 38mm. Minimum flange depth shall be 38mm. If finger-jointed is made necessary, it shall be processed in-house in accordance with the requirements of EN 15497. Incoming LSL shall be CE marked in accordance with CUAP 03.04/13, and of a grade such as the mean MOE in bending lies between 9 000 N/mm2 and 13 000 N/mm2 in edge orientation respectively between 7 500 N/mm2 and 11 000 N/mm2 in flat orientation. In addition its density shall lie between 630 kg/m3 and 780 kg/m3. Strength and stiffness properties are these listed for the selected manufacturer/product and grade in its ETA, DOP and CE Certificate of constancy of performance.

INOPANNE I-Joists

ANNEX 2 (2/4)


ETA 04/0022 of 23/02/2016 page 9 of 19

LSL made from made from aspen (min 70%) and a mix of other hardwoods (max 30%) has been subject to rout (flange-to-web) shear resistance testing. Therefore, unless additional initial type testing of rout shear capacity is realised under the responsibility of the Notified Body in charge of continuous surveillance, LSL shall meet this species specification and mix.

3-ply panels

Web of INOPANNE beam can be made from 32mm thick 3-ply panels which shall either meet the requirements of 3-ply cross-laminated timber per EN 16351 or be CE marked as solid wood panel of class SWP/2 per EN 13986 and EN 13353. Strength and stiffness properties are these listed for the indicated layup in Table 4 thereafter. 3-ply panels made from spruce has been subject to rout (flange-to-web) shear resistance testing. Therefore, unless additional initial type testing of rout shear capacity is realised under the responsibility of the Notified Body in charge of continuous surveillance, 3-ply panel shall be of spruce, pine or larch only. In addition, 3-ply panels must meet the minimum requirements relative to strength and stiffness properties listed in Table 4 thereafter and undergo 3

rd party supervision to ensure the core bending properties are met.

Table 4 – Minimum strength and stiffness properties of 3-ply panels

Mechanical properties - N/mm2

3-ply panel layup (32mm thickness)

5.5/21.0/5.5 9.0/14.0/9.0

Panel bending (loading perpendicular to panel plane)

MOE parallel to face grain Em,0 7 000 9 900

MOE perp. to face grain Em,90 3 300 1 400

Bending strength parallel to face grain fm,0,k 19.6 24.3

Bending strength perp. to face grain fm,90,k 12.6 7.6

Shear strength fv,k 1.5 1.5

Edge bending (loading parallel to panel plane)

MOE parallel to face grain Em,0 4 000 6 000

MOE perp. to face grain Em,90 7 300 5 300

Bending strength parallel to face grain fm,0,k 9.8 14.7

Bending strength perp. to face grain fm,90,k 18.0 13.1

Shear strength fv,k 2.7 2.7

Shear modulus G 600 600

Adhesive

INOPANNE joists are manufactured using a Type I (EN 301) one-component polyurethane adhesive. This adhesive is used both for finger-jointing and web-to-flange assembly.

INOPANNE I-Joists

ANNEX 2 (3/4)


ETA 04/0022 of 23/02/2016 page 10 of 19

Web-to-flange joint

The characteristic shear resistance of the web-to-flange joint (rout shear capacity) fv,rout,k impacts the INOPANNE joist characteristic shear resistance and is dependent from the combination of flange and web material. The applicable resistances are listed on Table 5 below.

Table 5 – Characteristic rout shear capacity fv,rout,k of flange and web material combinations

Flange Material Web Material

Solid timber (1)

3-ply panel (4)

LSL (3)

Material hf bf bw = 30 – 34mm bw = 32mm bw = 30 – 38mm

Solid timber (1)

50 – 120mm 58 – 120mm fv,rout,k = 4.0 N/mm

2

fv,rout,k = 6.5 N/mm

2

fv,rout,k = 5.5 N/mm

2

Glulam or glued solid timber (1)

120 – 135mm 58 – 135mm

LVL (parallel veneers) (2)

38 – 90mm 58 – 140mm

LSL (3)

38 – 90mm 58 – 140mm

(1) Softwood species only (2) Spruce, Pine, Southern Pine or Beech only (3) Apspen (min 70%) and other hardwoods (max 30%) (4) Spruce, Pine or Larch

INOPANNE I-Joists

ANNEX 2 (4/4)


ETA 04/0022 of 23/02/2016 page 11 of 19

Table 6 – Characteristic design properties of standard INOPANNE sections

Joist Flexural Shear Characteristic Design Properties

Description Rigidity Rigidity Bending Moment (1) Vertical END Bearing (4) INTERNAL Bearing (4)

Shear 45mm 90mm 90mm 140mm

EIjoist GAjoist Mk

(2) Mk (-) (3)

Vk Rk,END,45 Rk,END,90 Rk,INT,90 Rk,INT,140

x109 N.mm2 x106 N kN.m kN.m kN kN kN kN kN

INOPANNE 58x180 298.8 4.22 5.85 5.85 10.93 9.79 19.58 19.58 30.45

INOPANNE 70x180 353.2 4.22 6.76 6.76 10.93 11.81 23.63 23.63 36.75

INOPANNE 58x220 528.1 5.16 7.91 7.91 13.36 9.79 19.58 19.58 30.45

INOPANNE 70x220 617.2 5.16 9.08 9.08 13.36 11.81 23.63 23.63 36.75

INOPANNE 58x250 756.5 5.87 9.63 9.63 15.19 9.79 19.58 19.58 30.45

INOPANNE 70x250 877.3 5.87 11.00 11.00 15.19 11.81 23.63 23.63 36.75

INOPANNE 58x300 1259.5 7.04 12.82 12.82 18.22 9.79 19.58 19.58 30.45

INOPANNE 94x300 2005.7 7.04 21.27 21.27 18.22 15.86 31.73 31.73 49.35

INOPANNE 58x360 2304.5 8.45 20.95 20.95 21.87 9.79 19.58 19.58 30.45

INOPANNE 70x275 1211.6 6.45 14.34 14.34 16.71 11.81 23.63 23.63 36.75

INOPANNE 70x295 1470.5 6.92 15.93 15.93 17.92 11.81 23.63 23.63 36.75

INOPANNE 70x329 2080.6 7.72 23.84 18.79 19.99 11.81 23.63 23.63 36.75

INOPANNE 70x343 2466.5 8.05 25.21 25.21 20.84 11.81 23.63 23.63 36.75

INOPANNE 70x393 3610.5 9.22 30.74 30.74 23.87 11.81 23.63 23.63 36.75

INOPANNE 94x393 4756.4 9.22 40.49 40.49 23.87 15.86 31.73 31.73 49.35

INOPANNE 94x419 5831.3 9.83 51.68 44.07 25.45 15.86 31.73 31.73 49.35

INOPANNE 94x439 6626.3 10.30 55.06 47.16 26.67 15.86 31.73 31.73 49.35

INOPANNE 94x465 8037.1 10.91 59.30 59.30 28.25 15.86 31.73 31.73 49.35

INOPANNE CC 350 3276.4 8.21 24.51 22.35 21.26 22.78 45.56 45.56 70.88

INOPANNE CC 400 4774.1 9.38 32.15 27.75 24.30 22.78 45.56 45.56 70.88

INOPANNE CC 434 7589.6 10.18 57.15 47.88 26.36 22.78 45.56 45.56 70.88

INOPANNE CC 460 9309.3 10.79 74.62 60.09 27.94 22.78 45.56 45.56 70.88

INOPANNE CC 480 10468.5 11.26 80.59 63.93 29.16 22.78 45.56 45.56 70.88

INOPANNE CCR 335 2753.7 7.86 23.05 20.39 20.35 11.81 23.63 23.63 36.75

INOPANNE CCR 385 4067.1 9.03 30.52 25.63 23.39 11.81 23.63 23.63 36.75

INOPANNE CCR 419 6431.4 9.83 55.30 45.05 25.45 11.81 23.63 23.63 36.75

INOPANNE CCR 445 7871.2 10.44 64.87 56.87 27.03 11.81 23.63 23.63 36.75

INOPANNE CCR 465 8875.1 10.91 68.86 60.55 28.25 11.81 23.63 23.63 36.75 (1)

Characteristic bending moment assuming lateral bracing is provided at a distance not exceeding 8 times the top flange width.

(2) Characteristic bending moment where the bottom flange is in tension.

(3) Characteristic bending moment where the top flange is in tension.

(4) Characteristic bearing resistances are given without web stiffeners for the indicated bearing length, and may be

calculated for lengths equal or greater than 45mm using the proposed equation in Annex 5. For INOPANNE CCR series (with circular bottom flange), the bearing resistance is based on a flat profiled width of 70mm.

INOPANNE I-Joists

ANNEX 3 (1/1)

of ETA 04/0022 Characteristic design properties

ETA 04/0022 of 23/02/2016 page 12 of 19

The hybrid nature of the composite wood-based I-joist made from components of different material with possibly different time-dependent behaviour requires to account for these differences in the design to EN 1995-1-1. The following provides guidance on the determination of the design factors to use for the design of INOPANNE joists made from different materials and grades, based on the design factors applicable to the single component materials.

System effect factor ksys

The system factor, of magnitude 1.1 given in clause 6.7(2) of EN 1995-1-1 is applicable to systems made from

repetitive INOPANNE joists with appropriate load-distributing decking or sheathing.

Recommended partial material factor γM

The partial material factors γM for timber, glulam, glued solid timber or LVL are nationally determined parameters and can be found in the relevant National Annex to EN 1995-1-1. It is however seldom that such partial material factor has been defined for wood-based I-joists. The partial material factors γM for LSL is usually not defined in National Annexes and therefore a recommended value is found in the ETA and/or the DOP of the actual LSL product. The typical value is that defined in the relevant National Annex for LVL, which is recommended by default in EN 1995-1-1 to be taken as 1.20. The partial material factors γM for 3-ply panels is usually not defined in National Annexes. In order to be used as web material of INOPANNE joists, 3-ply panels shall either meet the requirements of 3-ply cross-laminated timber per EN 16351 or be CE marked as solid wood panel of class SWP/2 per EN 13986 and EN 13353. These products are not expressively mentioned in National Annexes yet. It is however commonly accepted that γM values defined for solid timber also apply to CLT or Solid Wood Panels, which is recommended by default in EN 1995-1-1 to be taken as 1.30. In member states where specific values of the partial factors γM for the web and flange materials have been set in the National Annex to EN 1995-1-1, these values shall be used. Else, the proposed values listed above may be used. Unless specific values of γM have been defined for light composite wood based beams, it is proposed to use the following for INOPANNE joists:

√

INOPANNE I-Joists

ANNEX 4 (1/3)

of ETA 04/0022 Design factors

ETA 04/0022 of 23/02/2016 page 13 of 19

Using the default values proposed in EN 1995-1-1, Table 2.3, and applying these to the allowed combinations of INOPANNE web and flange materials, yields:

Table 7 – Recommended default values of γM for INOPANNE joists based on flange and web material combinations

Flange Material

Web Material

Solid timber 3-ply panel LSL

Material γM,Flange γM,Web = 1.30 γM,Web = 1.30 γM,Web = 1.20

Solid timber γM,Flange = 1.30 γM,INOPANNE = 1.30

(1) γM,INOPANNE = 1.25

(1)

Glulam or glued solid timber γM,Flange = 1.25

LVL (parallel veneers) γM,Flange = 1.20 γM,INOPANNE = 1.20

LSL γM,Flange = 1.20

(1) Calculated value for Glulam or glued solid timber flanges has been rounded up to nearest 0.05.

I-joists are often connected to supporting members via 3-dimensional steel connectors. In member states where specific values of the partial factors γM for connections have been set in the National Annex to EN 1995-1-1, these values shall be used, else the default value γM,connection = 1.3 proposed in EN 1995-1-1, Table 2.3 may be used. For accidental situations γM,accidental = 1.0 shall be used.

Modification factor kmod for load duration and moisture conditions

The behaviour of the timber flanges and web of the joists based on moisture conditions and load duration shall be taken into account using the procedures in EN 1995-1-1, using modification factors kmod. These will be listed in the ETA and were taken from EN 1995-1-1, Table 3.1 for web and flange related properties for listed materials. The modification factors kmod for LSL are not listed in EN 1995-1-1 and therefore a recommended value is found in the ETA and/or the DOP of the actual LSL product. The typical value is that defined for LVL. The modification factors kmod for 3-ply panels are not listed in EN 1995-1-1. In order to be used as web material of INOPANNE joists, 3-ply panels shall either meet the requirements of 3-ply cross-laminated timber per EN 16351 or be CE marked as solid wood panel of class SWP/2 per EN 13986 and EN 13353. These products are not expressively listed in EN 1995-1-1 yet. It is however commonly accepted that kmod values defined for solid timber also apply to CLT or Solid Wood Panels. Further, the DOL modification factors kmod defined in EN 1995-1-1, Table 3.1 for the flange material apply to flange related i.e. bending moment or axial stresses, while those for the web material apply to web related i.e. shear stress.

INOPANNE I-Joists

ANNEX 4 (2/3)


ETA 04/0022 of 23/02/2016 page 14 of 19

The bearing failures observed in the course of original Initial Type Testing of INOPANNE joists were fully flange material related, which is a direct consequence of the large web thickness and double-rout profile preventing web knifing failure. As shear near supports is being checked specifically in design with the appropriate web related kmod, the flange material related kmod factors is used for bearing resistances as well. In accordance with the above, the following shall be used for the design of INOPANNE joists:

the flange material kmod values for bending, bearing resistance and axial stresses the web material kmod values for shear (and shear at holes)

This will ensure that in case of an ETA or DOP of one component stating the use of different kmod values, these values are used appropriately.

Modification factor kdef for creep

The creep behaviour of the flange and web materials of the joists shall be taken into account using the procedures in EN 1995-1-1, using modification factors kdef. These will be listed in the ETA and were taken from EN 1995-1-1, Table 3.2 for web and flange related deflection for listed materials. The creep factors kdef for LSL are not listed in EN 1995-1-1 and therefore a recommended value is found in the ETA and/or the DOP of the actual LSL product. The typical value is that defined for LVL. The creep factors kdef for 3-ply panels are not listed in EN 1995-1-1. In order to be used as web material of INOPANNE joists, 3-ply panels shall either meet the requirements of 3-ply cross-laminated timber per EN 16351 or be CE marked as solid wood panel of class SWP/2 per EN 13986 and EN 13353. These products are not expressively listed in EN 1995-1-1 yet. It is however commonly accepted that kdef values defined for plywood also apply to CLT or Solid Wood Panels. The creep modification factors kdef defined in EN 1995-1-1, Tables 3.2 for the flange material apply to flange related i.e. bending deformation, while those for the web material apply to web related i.e. shear deformation.

Table 8 – Values of kdef for INOPANNE joists based on flange and web material combinations

Bending Deformation Shear Deformation

Flange materials per Table 3 Timber or LSL web 3-ply panel web

Service Class 1 Service Class 2 Service Class 1 Service Class 2 Service Class 1 Service Class 2

0.60 0.80 0.60 0.80 0.80 1.00

INOPANNE I-Joists

ANNEX 4 (3/3)


ETA 04/0022 of 23/02/2016 page 15 of 19

Methodology for flexural rigidity

For INOPANNE joist made from the same material and grade, where , the joist flexural rigidity EIjoist is

calculated as: in N.mm2

where: Ijoist is the moment of inertia of the homogenous section about its true neutral axis. In the case of flanges and web being of different material and grades, the joist flexural rigidity EIjoist of the composite section is calculated using the moment of inertia equilibrium theory:

∑ ( )

in N.mm2

with the moment of inertia of the component “i” (top or bottom flange or web) about the component’s neutral axis, taking into account the trapezoidal rout profiles. the actual MOE of the member ”i”. the distance from the centroid of the component “i” to the neutral axis of the I-joist section The effective moment of inertia of the non-homogenous section about its true neutral axis is defined as:

in mm

4

Methodology for Shear rigidity

For INOPANNE joists using the same material and grade for flanges and web, the joist shear rigidity GAjoist of the homogeneous section is calculated as: in N

with: in mm2

For INOPANNE joists using different materials and/or grades for flanges and web, the joist shear rigidity GAjoist of the composite section is calculated as: in N

with: { } in N/mm2

where: Geff,mean is the effective shear modulus used for calculating the composite section shear rigidity G0,mean,w is the shear modulus of the web material grade G0,mean,f is the shear modulus of the flange material grade

INOPANNE I-Joists

ANNEX 5 (1/4)

of ETA 04/0022 Calculation methodology for mechanical properties of INOPANNE joists

ETA 04/0022 of 23/02/2016 page 16 of 19

Methodology for Bending moment capacity

The Moment resistance will be determined using the principle described in EN 1995-1-1, section 9.1.1 as follows:

{

}

in kN.m

where: is the moment of inertia of the I-joist section about its neutral axis. In case of non-

homogeneous section shall be used.

Mk,m,top is the moment resistance calculated from the top flange extreme fibre bending strength Mk,m,bot is the moment resistance calculated from the bottom flange extreme fibre bending Mk,c,top is the moment resistance calculated from the top flange axial compression strength Mk,t,bot is the moment resistance calculated from the bottom flange axial tension strength vjoist is the distance from bottom of the joist to the joist neutral axis vtop is the distance of the centreline of the top flange to the joist neutral axis vbot is the distance of the centreline of the bottom flange to the joist neutral axis kh,top , kh,bot is the depth (or width) effect factor for bending strength of the flange (EN 1995-1-1, §3) kl,top , kl,bot is the length (or width) effect factor for tension strength of the flange (EN 1995-1-1, §3) (for simplicity, length effect factor values can be calculated for a length of 13.5m) kc is the lateral stability factor defined in EN 1995-1-1, section 9.1.1(3), which will be taken as

1.0, assuming that lateral restraint will be provided at a maximum distance of 8 times the compression flange width or special lateral stability verification will be performed.

For non-symmetrical sections, two values of the moment resistance Mk and Mk,up shall be determined, assuming alternatively the largest flange section to be located at the bottom (tension flange) for downward loading or at the top (compression flange) for upward loading.

Methodology for Shear resistance

The Shear resistance of INOPANNE joists is determined as:

{

( )

} in kN

INOPANNE I-Joists

ANNEX 5 (2/4)


ETA 04/0022 of 23/02/2016 page 17 of 19

where: kcr is the factor taking into account influence of cracks per EN 1995-1-1/A1, section 6.1.7(2) = 0.67 for solid timber web ; 1.0 for LSL or 3-ply web fv,rout,k is taken per Erreur ! Source du renvoi introuvable., value protected by factory production control EIjoist is the joist flexural rigidity as determined in page 1 of this Annex Ef is the actual MOE of the flange timber grade Qf is the first moment of area of one flange about the joist neutral axis calculated as:

( ) ( ) (

)

teff = 4 x drout is the length of effective glue joint considered For non-symmetrical sections, two values of the rout shear resistance Vk,rout,top and Vk,rout,bot shall be determined, assuming alternatively the largest and the smallest flange section when calculating the first moment of area:

( ) ( ) (

)

( ) ( ) (

)

Methodology for Hole design

For round (circular) holes of diameter D ≤ 30mm, the shear capacity given for the I-joist without holes applies. For round (circular) holes of diameter D > 30mm, the vertical shear capacity of INOPANNE joist shall be reduced as follows:

where:

( )

( )

In addition it shall be verified that:

the hole diameter is not exceeding the web free depth:

the distance from the face of the nearest support to the nearest edge of the hole shall equal or exceed 300mm Up to 3 holes of diameter D > 30mm can be placed within the same span of INOPANNE joists provided the edge to edge distance between two subsequent holes is equal or greater than twice the largest diameter. Square or rectangular holes in INOPANNE joists are not covered by the above rules and require specific design by a qualified design professional.

INOPANNE I-Joists

ANNEX 5 (3/4)


ETA 04/0022 of 23/02/2016 page 18 of 19

Methodology for Bearing resistance

The bearing resistance of INOPANNE joists is determined by the compression perpendicular to the grain capacity of the flange timber grade about the unadjusted bearing area: For bearing length ≥ 45mm: ( )

where: kc,90 is the factor for discontinuous supports defined in EN 1995-1-1/A1, section 6.1.5(4) fc,90,k is the characteristic compression perp. to the grain strength of the flange timber grade bb is the actual bearing width in mm, typically = bf,bot except for round bottom flanges where bb = 70mm lb is the actual bearing length in mm NOTE: The effective bearing area Aef as defined in EN 1995-1-1/A1, section 6.1.5 shall not be used, bearing area is

conservatively limited to the true bearing area at both end and internal bearing.

INOPANNE I-Joists

ANNEX 5 (4/4)


ETA 04/0022 of 23/02/2016 page 19 of 19

INOPANNE CCR joists are manufactured with a round (circular) bottom flange profiles in glued solid timber. This specific shape makes specific requirements for their installation necessary, especially at supports. INOPANNE CCR shall only be used for simple span application. In addition, at end supports, the round bottom flange shall be profiled into a rectangular section meeting the following requirements:

the horizontal (flat) profiled width must be equal to 70mm (used for determining the bearing resistance of INOPANNE CCR joists)

the vertical (height) profiled flange depth must be equal to 115mm NOTE: These two requirements correspond to the inscribed rectangular shape of 70mm width which can be cut from

the 135mm diameter circular bottom flange the horizontal (flat) profiled length shall be equal to the bearing length and not expand more than 5mm from

the face of the bearing These requirements are illustrated in the figure thereafter.

Once profiled at supports, the support configuration of the INOPANNE CCR joists can be handled similarly to the other INOPANNE joist series with rectangular flange shape (e.g. hanger support or bearing on timber frame wall with blocking or bearing within a pocket in masonry wall,…).

INOPANNE I-Joists

ANNEX 6 (1/1)

of ETA 04/0022 Specific installation requirements for INOPANNE CCR joists

european technical eta 04/0022 assessment of...

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