Building Construction Handbook, Eighth Edition

Lateral Restraint † stability of gable walls and construction at

the eaves, plus integrity of the roof structure during excessive

wind forces, requires complementary restraint and continuity

through 30¾5 mm cross sectional area galvanised steel straps.

Exceptions may occur if the roof:-

1. exceeds 15°pitch, and


2. is tiled or slated, and


3. has the type of construction known locally to resist gusts,
   and


4. has ceiling joists and rafters bearing onto support walls at
   not more than 12 m centres.

Application ~

Timber Pitched Roofs