Under NZBC Clause D1 (Access Routes), the width between handrails on an accessible stairway or between handrail and wall on a common stairway shall be no less than 900 mm.
The below screenshots show the absolute minimum width a stairway must be when using a wall mount, single handrail & double handrail Moddex Assistrail system. Moddex recommends that these minimum stairway widths are increased by 50 to 100 mm as a tolerance for any varying widths on site & to provide room for adjustment.
More details on the NZBC Clause D1 can be found here.
To save time, resource and ease of installation when specifying Moddex guardrails or balustrades please consult the Compliance Tip or contact us on 1800 663 339 (Australia) or 0800 663 339 (New Zealand)