A secondary spiral stair assessing a loft basement or mezzanine will require a 600mm clear tread width.
Spiral staircase minimum diameter.
Spiral staircase diameter for domestic spiral staircases.
Stair balusters shall be spaced so a 4 inch object cannot pass between.
Learn about the available dimensions and sizes for spiral staircases.
Paragon has a wide variety of prefab and custom stairs to fit any design plans.
Of clear walking path.
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The total diameter of your spiral staircase however may be limited by the amount of space you have available.
Tread path between handrail and center column a minimum 26 center tread width 7 1 2 in from the narrow end of the tread d.
Minimum spiral stair tread width is 26 inches salter s code platforms start at 31 inches wide.
The diameter of the staircase determines the width of the stair treads the minimum dimension of which is specified by the irc.
Headroom minimum of 6 6 riser height cannot exceed 9 1 2.
Please review technical data sheet for additional information on measurements.
Spiral stair building code compliance.
Generally speaking the wider your staircase is the better it will look and the safer it will be.
Mylen stairs condor black 42 in diameter 12 treads with 1 36 in tall platform rail spiral stair kit.
This spiral staircase meets minimum 2015 irc requirements.
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The smallest spiral stair diameter that we offer is 3 6 which translates to a 42 x 42 footprint.
Arke phoenix 47 in x 10 ft white spiral staircase kit.
From here the footprint will increase in 6 increments like the diameters.
Give your staircase a minimum diameter of 26 inches 66 cm.
Minimum stair diameter of 60 for a metal stair and 64 for a wood stair.
0 in in diameter spiral staircases have 26 in.
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Landing width shall not be less than the required staircase width.
The irc stair code permits a 4 3 8 inch space.