2. LVL STRUCTURES IN FLOORS, WALLS, ROOFS AND IN SPECIAL APPLICATIONS 2.4.5 Ledger beam supports for floors or canopies In a timber frame wall of a balloon construction where the walls are higher than one storey, the floor structures are connected to the walls with a ledger beam which is either fixed to the wall stud with nail or screw connections or sits in notches in the wall studs. Similarly, canopies for, e.g., entrances can be fixed to the exterior wall frames with ledger beams. They should be at least 45 mm thick to provide adequate bearing length for the joists, or 39 mm thick if the joists are connected with hangers. The beam height depends on the stud spacing and the number of nails or screws needed for the connections. The bending moment from the ledger beam supported structure must be taken into account in the stud design. Figure 2.67. Ledger beam supporting a canopy. Can be fixed to the timber frame wall studs with nail or screw connections or notched in to the studs. LVL Handbook Europe 91
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