Spiral Staircase Code Requirements

In permitting the spiral staircase to be used as exit staircase in case of fire and for rescue and fire fighting operations by fire fighters. Now that you know a little more about spiral stair diameters check out our building code page to learn more about code requirements of your spiral stair. The most common specifications result in spirals with the following dimensionsrequirements.
spiral staircase code requirements

A spiral stairway shall have a 7 1 2 inch 191 mm minimum clear tread depth at.

Spiral stairways and bulkhead enclosure stairways shall comply with the requirements of section r3117 except as specified in sections r3117101 and r3117102.

Spiral staircase code requirements. If you have any additional questions about your stairs diameter or building code call one of our consultative designers at 1 800 368 8280 for instant answers. Stair railing guardrail handrail landing platform building codes design specifications. The design of spiral staircases potentially makes them tricky to navigate and building code requirements for spiral stairs are focused on making them as safe. A minimum clear width at and below the handrail of 26 inches 660 mm each tread having a 712 inch190 mm and minimum tread depth being 12 inches 914 mm from the narrower edge.

Learn about how paragon stairs provides code compliant spiral stairs to meet your local code requirements. Provides citations of stair and railing code design specifications quoted from model building codes. Minimum stair diameter of 60 for a metal stair and 64 for a wood stair. Examples of code requirements our spiral stairs meet include.

As spiral staircase is very steep and winding the time taken by occupants to exit downwards during an emergency would be much longer hence there is a need to limit the occupant load to max. Spiral stair building code compliance. Headroom is the vertical dimension from the stair treads to the ceiling directly above. Tread path between handrail and center column a minimum 26.

Spiral stairways are permitted to be used as a component in the means of egress only within dwelling units or from a space not more than 250 square feet 23 m 2 in area and serving not more than five occupants or from technical production areas in accordance with section 4106 of the california building code. Spiral stairs building regulations. This article series lists all major building code specifications for stairs. For code requirements the minimum staircase width is the horizontal dimension between the sidewalls of a staircase measured above the handrails.

For each stair specification code citation we include links to in depth articles providing more details. Based on 549 reviews. R311711 alternating tread devices alternating tread devices shall not be used as an element of a means of egress.