The Calculations have been updated and extended for 2026

Calculations may be purchased as individual sheets or in subject sets.

Use the Order Form below, or click on the PDF Icon to download the Order Form.

Print the order form as a PDF and email your completed order form to admin@bigpigltd.com.

The calculation sheets are offered on an "as-is" basis. The user is responsible for the appropriate use of the calculations contained therein. Big Pig Ltd accepts no liability for misuse of the calculation sheets. No liability is accepted for errors or omissions in the calculations sheets. The calculations have been prepared for use in New Zealand and are intended to allow engineers to create calculations in accordance with New Zealand Standards in compliance with New Zealand Building Code. ​

Note: Orders will be processed on the next working day. Prices are shown in NZ$ excluding GST.

For customers who are exempt from paying GST enter code 'GSTEXEMPT'.