2. LVL STRUCTURES IN FLOORS, WALLS, ROOFS AND IN SPECIAL APPLICATIONS Calculations according to EN 1995-1-1:2004+A1:2008 and its Finnish National Annex. Roof slope is 1:3. Permanent load is 0.9 kN/m², snow load on the ground sk is 0,65, 1,5 or 2.75 kN/m² (snow load at roof level = 0,8 x sk) and wind load = 0,2 kN/m2. Service class 1 or 2 and consequences class CC2. Rafters have lateral torsional buckling supports on the top surface at ≤ 900 mm spacing and the loads are located at the lateral torsional buckling supports. Rafters must be supported for the buckling at the midspan. The support length shall be calculated separately. Net final deflection wnet,fin ≤ L/200. γM = 1.2. This table does not replace project-specific structural design. Figure 2.30. Span table of single-span roof rafters at c/c 600, 900 and 1200 mm spacing for predesign. The spans lengths are given as horizontal projections between the centres of supports, not the inclined length of a rafter. LVL 02, Figure 2.26. 75x600 63x500 51x400 45x360 45x300 45x260 45x240 45x200 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Maximum span length [m] LVL 48 P ROOF RAFTERS, SNOW LOAD sk=0,65 kN/m2 c/c 600 c/c 900 c/c 1200 75x600 63x500 51x400 45x360 45x300 45x260 45x240 45x200 LVL 48 P ROOF RAFTERS, SNOW LOAD sk=1,5 kN/m2 c/c 600 c/c 900 c/c 1200 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Maximum span length [m] 75x600 63x500 51x400 45x360 45x300 45x260 45x240 45x200 LVL 48 P ROOF RAFTERS, SNOW LOAD sk=2,75 kN/m2 c/c 600 c/c 900 c/c 1200 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Maximum span length [m] 68 LVL Handbook Europe
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