1. LVL AS A CONSTRUCTION MATERIAL 1.9 TOLERANCES The tolerances of LVL members are defined in FprEN 14374:2018 and depend on the member sizes. The tolerance values are shown in Table 1.9 and the dimension definitions in Figure 1.61. Figure 1.60. Straight and accurate LVL-P beams. Table 1.9. Maximum deviations from nominal sizes and nominal angles for LVL, unsanded and not pressure treatment (FprEN 14374:2018). Figure 1.61. Dimensions of LVL. b = width (H=height), l = length, t = thickness. Arrow shows the grain direction of the surface veneer. Bottom: Example of the angle α deviation from the right angle of a cross section of LVL (FprEN 14374:2018). Stora Enso LVL 01, Table 1.8 • KORJATTU 29.8. Nominal sizes Maximum deviations Thickness t t ≤ 27 mm ± 1 mm 27 mm < t ≤ 57 mm ± 2 mm t > 57 mm ± 3 mm Width b b ≤ 300 mm ± 2 mm 300 mm < b ≤ 600 mm ± 3 mm b > 600 mm ± 0.5% Length l l ≤ 5 m ± 5 mm 5 m < l ≤ 20 m ± 0,1% l > 20 m ± 20 mm Maximum deviation α of the right angles of the cross section, see Figure 1.61 1:50 (approx. 1,1°) LVL Handbook Europe 41
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