Tools
Stairs
Enter the stair values you know and the calculator will derive the remaining geometry, then compare the numeric checks it can assess against NZBC D1/AS1 Table 6 for main private stairs.
Results
Number of Risers0
Riser Height0 mm
Number of Treads0
Tread Going0 mm
Total Rise0 mm
Total Run0 mm
Stair Angle0 deg
Enter enough values to assess pitch, riser height and tread depth against NZBC D1/AS1 Table 6.
Code checks used here: maximum pitch 37 deg, maximum riser height 190 mm, minimum tread depth 280 mm.
This tool does not assess every D1/AS1 requirement. Landings, widths, handrails, openings, nosings, slip resistance, and built-step uniformity still need design review.