IPENZ has published a revised Practice Note 12 Operator Protective Structures on its website. Download Practice Notes as PDFs online. (http://www.ipenz.org.nz/ipenz/PracticeSupport/Practice_Notes.cfm)
Practice Note 12 clarifies the processes involved in selecting, designing, and verifying protective structures on self-propelled mobile mechanical plant in construction, forestry, and agriculture. The practice note refers to several New Zealand and international Standards. You can order these Standards from Standards New Zealand's website www.standards.co.nz or email email@example.com or call 0800 782 632.