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LINKING TOMORROWS NEEDS WITH TRADITIONAL CRAFTSMANSHIP

CROSS LAMINATED TIMBER

TECHNICAL DETAIL

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Contents: Glulam properties page 3 CLT properties page 4 CLT characteristics: a) cross sections page 5 &6 b) material page 6 c) pre dimensioning page 6 & 7 CLT surface grading page 8&9

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SBR mass mber elements are made of large format, solid boards or beams of mber or derived mber products . The following technical details are compiled using approved figures from our suppliers in Germany, Austria and Switzerland. They are for pre‐dimensioning only and have to be confirmed for each project by a regis‐tered engineer.

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1) h = homogenous 2) c = combined a) The characteristic rolling shear strength f may be assumed as 1.0 N/mm2 for all strength classes. b) The shear modulus associated with rolling shear stresses may be assumed as G = 0.10 G c) For the characteristic stiffness values E0.05; E 90,0.05 and G0.05, the following calculated values apply: E 90,0.05 = 5/6 E 90, mean; G

Solid construction timber

Strength Classes of Timber F5 MGP10 DE/C24 F8 MGP 12 F14 MGP15 Flexural strength fm,k [N/ 16 16.2 24 25 28 40 41.3

Tensile strength

ft,0,k [N/ 8.2 8.9 14 13.0 15.0 21.0 22.7

ft,90,k [N/ 0.4

Compressive strength

fc,0,k [N/ 12 23.6 21 20.0 28.9 30.0 35.4

fc,90,k [N/ 2.5

Shear strength fv,ka) [N/ 1.8 5.0 2 2.5 6.5 3.7 9.1

Elasticity modulus

E c) 0,mean

[N/mm²]

6900 10,000 11,000 9,100 12,700 12,000 12,000

E c) 90,mean

[N/mm²]

370

Shear modulus G b)c) mean

[N/mm²]

460 670 690 610 850 800 850

Apparent density ʌk [kg/m³] 350

Glulam

Strength Classes of Timber AU/GL8 AU/GL10 AU/GL12

GE/GL 24 h

GE/GL 28 c

GE/GL 28 h

AU/GL13

GE/GL 32 c

GE/GL 32 h

GE/GL 36 c

AU/GL17

AU/GL 18

Flexural strength

fm,k [N/mm²]

19 22 25 24 28 28 33 32 32 36 42 50

Tensile strength

ft,0,k [N/ 10.0 11.0 12.0 16.5 16.5 19.5 16.0 19.0 22.5 22.5 21.0 25.0

ft,90,k

[N/mm²]

0.5 0.5 0.5 0.5 0.5 0.5

Compressive strength

fc,0,k [N/ 24.0 26.0 29.0 24.0 24.0 26.5 33.0 26.5 29.0 29.0 35.0 50.0

fc,90,k

[N/mm²]

2.7 2.7 3.0 3.0 3.3 3.3

Shear strength

fv,ka) [N/mm²]

3.7 3.7 3.7 2.5 2.5 2.5 3.7 2.5 2.5 2.5 3.7 5

Elasticity modulus

E c) 0,mean

[N/mm²]

8,000 10,000 11,500 11,600 12,600 12,600 13,300

13,700 13,700 14,700 16,700 18,500

E c) 90,mean

[N/mm²]

390 390 420 420 460 460

Shear modu-lus

G b)c) mean

[N/mm²]

530 670 770 720 720 780 900 780 850 850 1110 1230

Apparent density

ʌk [kg/m³] 380 380 410 410 430 430

Glulam properties

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construction multilayered crossed | 3-, 5-,7 ply

wood species spruce | larch | arolla pine | douglas | silver fir

moisture content 12% +/-2%

quality of top layer visible AB visible BC non visible, C

surfaces AB | BC smoothly glued without grooves | every longitudinal layer = single-ply board planed on both sides | sanded or brushed on one side optional

sizes width up to 3500 mm length | length up to 24 m [general finger joint GFJ] thickness | 57 mm - 341 mm

gluing single-ply board: MUF | E1, weatherproof, transparent glue groove CLT: PU | formaldehyde-free

dimensional change in element longitudinal direction 0.010 % per percentage change in moisture content in element cross direction 0.025 % per percentage change in wood moisture content

weight spruce p[12%] ~ 470 kg/m3 larch p[12%] ~ 590 kg/m3

heat insulation heat conductance AR = 0.13 W/mK [DIN] | Ameasured = 0.097 W/mK [98 mm CLT] specific thermal capacity c = 2.10 kJ/kgK thermal diffusivity a = 1.317 x 10-7 m2/s | [p= 470 kg/m3; A= 0.13 W/mK]

sound insulation solid soundproofing thanks to solid construction | certificate available on request

fire protection EU certificate for REI 30\30\30 - 90\90\90 available on request

diffusion open to diffusion, vapour barrier | diffusion resistance coefficient �-t ~ 70

approvals European Technical Approval ETA-06/0009 | CE marking German Technical Approval | Z-9.1-534

CLT properties

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layers thickness [mm] construction [mm] l

eff [m]

characteristic values

A [cm²] A [cm²] W [cm³] I [cm4] i [cm]

3

661) 20 26 20 2

400 648 659 1988 223

4 710 676 2177 233 6 723 679 2217 235

78 20 38 20 2

400 756 858 2922 270

4 862 887 3332 289 6 885 892 3422 292

90 27 36 27 2

540 806 1189 4568 291

4 944 1244 5355 315 6 976 1255 5534 320

1002) 37 26 37 2

740 858 1533 6667 300

4 996 1610 7737 323 6 1027 1625 7980 328

1102) 36 38 36 2

720 897 1771 7966 333

4 1103 1889 9797 369 6 1154 1914 10244 377

1202) 42 36 42 2

860 949 2157 10612 351

4 1180 2319 13194 392 6 1238 2353 13838 401

1302) 43 44 43 2

860 968 2404 12077 375

4 1263 2622 15747 428 6 1341 2669 16720 441

5

95 20 17.5 20 17.5 20 2

600 924 1187 4927 287

4 1044 1216 5570 305 6 1070 1222 5709 308

100 20 20 20 20 20 2

600 963 1273 5458 302

4 1107 1308 6270 323 6 1138 1315 6449 328

110 20 21 28 21 20 2

680 1039 1482 6912 319

4 1199 1518 7979 343 6 1235 1525 8216 348

120 21 26 26 26 21 2

680 1107 1692 8239 348

4 1327 1746 9882 381 6 1378 1757 10264 389

130 20 26 38 26 20 2

780 1175 1896 10027 359

4 1393 1938 11893 390 6 1443 1946 12323 397

140 42 17.5 21 17.5 42 2

1050 1116 2807 15728 387

4 1395 2998 19651 433 6 1464 3037 20624 443

147 41 22 21 22 41 2

1030 1123 2976 16689 403

4 1464 3211 21748 460 6 1553 3260 23071 473

163 42 21 37 21 42 2

1210 1242 3626 22449 431

4 1610 3880 29116 491 6 1706 3933 30850 505

181 42 38 21 38 42 2

1050 1163 3958 23052 469

4 1748 4437 34663 575 6 1933 4541 38323 604

203 42 38 43 38 42 2

1270 1290 4844 31063 495

4 1937 5351 46641 606 6 2141 5459 51552 637

213 42 43 43 43 42 2

1270 1291 5127 32905 509

4 2010 5712 51216 635 6 2248 5838 57272 672

CLT characteristics a) cross sections

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layers thickness [mm] construction [mm]

l eff [m]

characteristic values

Aeff [cm²]

AV,eff [cm²]

Weff [cm³]

Ieff [cm4]

ieff [cm]

7

233 42 21 43 21 43 21 42 2

1700 1382 6672 49630 5.40

4 2047 7304 73502 6.58 6 2252 7439 80872 6.90

248 42 26 43 26 43 26 42 2

1700 1344 7111 52036 5.53

4 2114 7901 81878 6.94 6 2372 8073 91880 7.35

284 42 38 43 38 43 38 42 2

1700 1276 8160 58025 5.84

4 2258 9336 102700 7.77 6 2645 9605 120325 8.41

299 42 43 43 43 43 43 42 2

1700 1254 8596 60582 5.97

4 2311 9935 111630 8.10 6 2752 10245 132953 8.84

341 63 43 43 43 43 43 63

2

2120

1163 11168 82199 6.23 4 2374 14087 167858 8.90

6 2976 14849 210399 9.96

kind of loading

EN 1995-1-1 | EN 338

[N/mm2]

E-modulus bending bending right angled to plane modulus of shear modulus of rolling shear thrust from lateral force pressure in plane normal pressure to plane tension on plane

E0,mean 11,000 f m,k 18 Gmean 690 GR,mean 50 f R,k 0.70 f c,0,k 21 f c,90,k 2.5 f t,0,k 9.80

c) CLT pre dimensioning

CLT characteristics a) cross sections (continued)

cross section values for elastically connected longitudinal layers using the Gamma-method

v,eff A = ρeff

1,5 Ieff (b= 100 cm)

... longitudinal layer ... cross layer

Aeff .... cross section area (only longitudinal layers)

A ... surface for shear proof

Ieff ..... torque of inertia Weff ... section modulus l ...... length

b) material

The following dimensioning is according to Euro code 5 and European Technical Approval (EN 1995-1-1:2004 und ETA 6/0009:2006)

The following tables may be used for pre dimensioning CLT and do not replace static calculations. The load is to be seen as evenly divided area load. requirements: * service class 1 (interior space kdef= 0.6) * self weight g1,k: is dead load without dead load of CLT * imposed load nk: service classes A und B (living and office space: ψ0=0.7 ψ1=0.5 ψ2=0.3 middle load duration, mod=0.8) *dimensioning in the case of fire according to EN 1995-1-2 and survey IBS-08012901:2008-06 (characteristic combustion rate for ceilings βn=0.74mm/min) * imposed load amounts to 50 % of the total load limiting values for deflection for serviceability limit states: * appearance: permitted long-term bending with a quasi-permanent design situation l/250 respectively l/350 cross section values: calculation of CLT cross sections according to the Gamma-method. For continuous beam leff= 4/5*l

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g1,k+nk

span width 3.0 m 3.5 m 4.0 m 4.5 m 5.0 m 5.5 m 6.0 m

permitted deflection

l/250 l/350 l/250 l/350

l/250 l/350

l/250 l/350 l/250 l/350

l/250 l/350

l/250 l/350

2.0

78

78

90 90 90 110-5s 110-5s 130-5s

130-5s

147 147

147 147 163

2.5 90 90

100-5s 110-5s 130-5s 130-5s

147 147

163 163 181

3.0 110-5s 203

3.5 90 90 100-5s

130-5s 130-5s

147 147

163 163

181 181

4.0

90

100-5s

110-5s 203

213 4.5

110-5s 181

203 5.0

163 163

181

233 5.5

100-5s

130-5s 147 147

203

6.0

130-5s 203

213

6.5

110-5s 181

233

213

7.0

163 163 181 233 248

7.5

8.0 147 203 213 284

g1,k+nk

span width 3.0 m 3.5 m | 4.0 m | 4.5 m | 5.0 m | 5.5 m 6.0 m

permitted deflection

l/250 l/350

l/250 l/350

l/250 l/350

l/250 l/350

l/250 l/350

l/250 l/350

l/250 l/350 2.0

78

78 78

78 78

90 90 100-5s 100-5s

130-5s

110-5s 130-5s 130-5s

147 2.5

90

110-5s 110-5s

130-5s

147

147 3.0

90

100-5s 100-5s

130-5s

130-5s

3.5 110-3s 110-5s

130-5s

147

147 163 4.0

90

130-5s 147 4.5

90

100-5s 100-5s

130-5s

130-5s 5.0

110-5s 130-5s

147

147

147 163

181 5.5

110-5s 163

6.0

147

147

203

6.5

90 100-5s

130-5s

130-5s

163 181 7.0

130-5s 147

147

163 7.5 100-5s 147 147 181

8.0 110-5s 203 R= 30\30\30 R=60\60\60

R=90\90\90

L > 0.8 * L

L

CLT pre dimensioning (continued)

Single span

Double span Shorter beam is 80% to 100% of longer beam.

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Extract from the European standard DIN EN 13017-1 surface classification of CLT characteristics A B C

adhesion no open glued joints open joints < 100 mm/m glued joint permitted

open joints < 100 mm/m glued joints permitted

visual appear-ance and colour

well balanced in colour and texture

considerably balanced in colour and texture

no requirements

texture rough texture permitted rough texture permitted no requirements

knots healty, strongly grown spruce knots: up to 40 mm larch knots: up to 60 mm and sporadic black knots

healthy, strongly grown knots and sporadic black knots permitted

permitted

dowel 2 natural branch dowel per-mitted

permitted permitted

resin pocket sporadic up to 3 mm x 40 mm perm.

sporadic up to 5 mm x 50 mm perm.

permitted

repaired resin pockets

permitted permitted permitted

ingrown bark not permitted permitted if sporadic permitted

shake sporadic surface shakes permitted

surface and end-shakes up to 50 mm length, permitted if sporadic

permitted

pith sporadic up to 400 mm length permitted

permitted permitted

compressions permitted if sporadic permitted permitted

insect attack not permitted not permitted small sporadic holes from non-active larvae per-mitted

discolouring not permitted slight discolouring permitted

permitted

decay not permitted not permitted not permitted

sapwood with larch, narrow stripes up to 20 % of the laminated width permitted

permitted permitted

quality of the sur-face finish

small sporadic flaws permitted

sporadic flaws permitted

no requirements

CLT surface grading

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www.crosslamtimber.com.au CLT surface grading examples:

visible (AB) industrial visible (BC)

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Available brochures:

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ALL technical information and illustrations in this brochure are collated from publications of our suppliers and ‘Environment Product Declarations” of building material manufacturers. Infor-mation provided may be superseded by new insights from time to time and be no longer valid. All information are examples only and must be verified as rele-vant for each project by a qualified engineer. Sustainable Building Resources Pty Ltd may not be held responsi-ble in any way. This includes printing errors .