Flat Roof Joist Span Trada Span Tables

Calculations are also given for canted purlins supporting roof sheeting or cladding and for flat roof joists. Notches are not to exceed 0 125 of the depth of the joist and are to be located between 0 07 and 0 25 of the span from the support. Now in its 4th edition the trada span tables publication is a must for any designer or builder.

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