I refer to your training and the article ‘Do you know your basics?’, in particular question 8 on calculating the length of the hip rafter where the roof pitch is 30° and span 6 m.

The formula and answer stated only provides the solution for calculating the length of a common rafter and not the true length of a hip rafter or hip tree.

This highlights a problem across the industry. Have I been doing it wrong for the last 40 years? At least none of my roof designs have failed.

Andrew Buckingham

Source

QS News