Floor And Roof Diaphragms

The design procedure given in EC5 for floor and roof diaphragms is a simplified approach to the design of such structures and applies only to diaphragms assembled from wood-based panels fixed to a timber-framed structure by mechanical fasteners, e.g. nails or screws.

In deriving the lateral strength of the mechanical fixings at the edges of the panels, EC5, 9.2.3.1(2), allows the capacity to be increased by 20% over the value calculated in accordance with the procedures described in Chapter 10.

9.4.1 Limitations on the applicability of the method

Typical horizontal floor or roof diaphragms are shown in Figure 9.7 using alternative arrangements of staggered panels. The structure has a span i (mm) and a width b (mm)

Lateral load = Fd

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