These publications from the NZ Forest Owners Association will help you learn more:
These training organisations can help:
Connexis
New Zealand’s infrastructure training organisation
www.connexis.org.nz
Tel: 0800 486 626
Competenz
Forestry training
www.competenz.org.nz
Tel: 0800 526 1800
Your contractor, supervisor and forest company may also have useful design and construction information