Provides guidance on the structural use of tropical timber in load bearing members. Includes recommendations on quality, permissible stresses and modification factors applicable to these materials when used as simple members, or as parts of built-up components, or as parts of structures incorporating other materials. Also gives recommendations on the design of nailed, screwed, bolted and connected joints, method of test to assess the adequacy of structural assemblies, and general advice on workmanship, various treatments which can be applied, inspection and maintenance.