Structural adjustment

摘要

Surely the whole point of Building Regulations Part A was that if you were designing standard domestic dwellings using traditional construction methods, you could flick through the rule-of-thumb structural span tables and choose the best dimensioned joist, rafter, purlin and so on for the job. Nobody reads much more than that. The Approved Document's merit was to provide an easy-to-read structural solution so architects could get on with more important issues.