Engineering Support for Code Of Practice

Archive of current and previous engineering documentation utilised in the production of the COP.

Item Notes File
Rectangular Gutter calculator Most recent version from WSP as used in March 2023 updates to drainage calculator
Valley Drainage Calculator Most recent version from WSP as used in March 2021 updates to valley drainage calculator.
-with proposed format changes for readme/changelog from 2024-04-08
NZS3604 Wind Loads

2024-01-18: Rod Newbold

In the interests of visibility and traceability, it was always my intention to make these available if challenged.  They have been recently checked by John Dale who has confirmed their accuracy.


Although they only show SLS, the actual arithmetic is the important part.  The SLS figures ae correct for the Cook Straight region, slightly conservative for the rest of the country.