General

The information in this section explains the various factors used in calculating a design loading and in resisting that load.

The designer must be familiar with the performance requirements of the New Zealand Building Code (NZBC). Loads can be calculated in accordance with the appropriate standard and maximum spans and fastening patterns specified according to manufacturers’ literature or the generic tables listed in this Code of Practice.

It is the responsibility of the roofing contractor to install roof cladding according to the design and raise any concerns with the designer before commencement.