Table 1: Bending test results for 241 mm deep latticed lvl web joists.

Joist ID - Stiffness (kN/mm) 1st Failure Load (kN) Peak Load (kN) Peak Deflection (mm) Failure Mode Bending Moment Capacity
(kNm)
Shear Force Capacity (kN)
241-1-B * 0.4313 4.9 6.10 26.2 T 2.89 2.45
241-2-B - 0.3321 - 8.65 25.9 P then S 5.10 4.33
241-3-B * 0.3560 5.35 5.55 29.0 T 3.16 2.68
241-4-B * 0.2774 - 6.75 25.2 T 3.98 3.38
241-5-B * 0.3416 5.65 5.90 31.1 P 3.33 2.83
241-6-B * 0.3326 - 8.00 24.6 T 4.72 4.00
241-7-B * 0.3680 - 7.60 20.7 T 4.48 3.80
241-8-B - 0.3092 - 5.20 17.6 P then S 3.07 2.60
241-9-B - 0.3459 - 7.85 23.5 P then S 4.63 3.93
241-10-B - 0.3380 - 7.15 23.7 P then S 4.22 3.58
241-11-B - 0.3029 - 7.25 24.0 P then S 4.28 3.63
241-12-B - 0.3735 - 7.70 24.2 P then S 4.54 3.85
241-13-B ** 0.3869 - 8.60 24.8 P then S 5.07 4.30
241-14-B ** 0.3758 - 9.00 25.0 P then S 5.31 4.50
241-15-B - 0.3960 - 6.80 18.1 T 4.01 3.40
241-16-B - 0.3110 - 7.80 26.3 P then S 4.60 3.90
Mean - 0.3486 5.30 7.24 24.3 - 4.21 3.57
Std. Dev. - 0.0393 0.38 1.13 3.4 - 0.75 0.64
5th Perc. - 0.2772 4.22 5.19 18.0 - 2.84 2.41

*UF glue used, (otherwise PRF glue used)
**LVL webs manufactured using UF glue and Irish Sitka Spruce lamellae (otherwise Norway Spruce lamellae used)