Current
Core Supplement
Contains section sizes and spans for solid timber members in floors, ceilings and roofs (excluding trussed rafter roofs) for dwellings. The calculations apply to buildings up to three storeys in height above ground level. These tables were originally included in the England and Wales Building Regulations, Approved Document A: Structure. Tables are included for domestic floor joists, ceiling joists and binders, and rafters and purlins supporting rafters for traditional pitched roofs. Calculations are also given for purlins supporting roof sheeting or cladding, and for flat roof joists. The tables cover softwood species and grade combinations which satisfy strength classes C16 and C24, and comply with current regulations and standards. Revised to cover enhanced shear strength, enhanced bearing strength, trimmer tables and there are changes to some section sizes.
Ranasinghe, K.
First edition published in 2004 and reprinted with amendments in 2005. Second edition published and reprinted in 2008. Third edition published in 2009 and reprinted with corrections (no changes to spans) in 2010, 2012, 2013, 2014. This document has been split into parts for ease of use. Supersedes DEA series (TRADA, 1984).
9781909594142
BM TRADA originates during the 1930s when a forerunner of what later became the Timber Research and Development Association (TRADA) was set up to promote the use of wood in construction. Their publishing programme delivers an extensive range of timber information - Eurocode 5 guidance, span tables, Wood Information Sheets and technical manuals on timber structures, characteristics, performance aspects such as fire and durability, and common applications.
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
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