2. LVL STRUCTURES IN FLOORS, WALLS, ROOFS AND IN SPECIAL APPLICATIONS 2.2.2 Main beams for floors LVL-P members are used as supporting beams for multiple span joist floors, headers over openings and trimmers around e.g. staircase openings. The supporting beams can be under the joists or the joists are connected to the sides of the supporting beams with e.g., joist hangers or diagonal screwing. To save structural height while retaining adequate load-bearing capacity, multiple-member LVL beams are used. Nailing, screwing or bolting patterns are required to ensure stability, especially when the beams are side loaded. At minimum, the plies are nailed together in 2 rows at c/c 300 mm. Loading from only one side is allowed for beams with a maximum of 3 members. Top-loaded beams or beams equally loaded from both faces may have at maximum 4 members. LVL suppliers provide connector-specific capacity tables for side-loaded beams. Figure 2.10. Instructions for nailing and screwing patterns for multiple-member LVL beams. 56 LVL Handbook Europe
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