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SPAN TABLES FOR JOISTS AND RAFTERS 1 AMERICAN WOOD COUNCIL EXPLANATION OF TABLES 1. SCOPE hese span tables for joists and rafters are calculated T on the basis of a series of modulus of elasticity (E) and bending design values (F b). Additionally, compression perpendicular to grain design values (F c⊥) are included
C24 Span Table - Domestic Flat Roof Joists. Access for maintenance and repair only. Imposed load not exceeding q = 0.6 kN/m2 or Q = 0.9 kN or “slab. k loading”. flat roof joists of solid timber for specified loadings, sizes and spacings.
The above table provides a general summary of common permissible clear spans of flat roof joists of solid timber for specified loadings, sizes and spacings. The table is solely for guidance on the loadbearing capacity of solid timber members, and cannot be adapted for hardwoods or engineered timber products.
Span tables can be used to determine the size of a timber member of a particular strength class required for a given span. They also tell you what the maximum spacing should be between each section or timber member.
SPAN TABLES FOR JOISTS AND RAFTERS 1 AMERICAN FOREST & PAPER ASSOCIATION EXPLANATION OF TABLES 1. SCOPE These span tables for joists and rafters are calcu-lated on the basis of a series of modulus of elasticity (E) and bending design values (F b). Additionally, compres-sion perpendicular to grain design values (F c⊥) are
SUPPLEMENT TO SPAN TABLES FOR jOISTS AND RAFTERS.
Find the column for your dead load and spacing, and the row for your timber size to find the permissible clear span in metres. Click on a span to generate a full calculation (you can adjust the exact span). This span table is to the format and methodology given in BS 5268-7.2.
