Spiral Staircase Minimum Size

Our standard diameters range up to 6 wide but we are able to go much wider if your custom staircase calls for it.

Spiral staircase minimum size. The minimum staircase width is the same as the minimum circulation zone width of 3ft 0 91m. Its ideal value is 280 mm 11. Use our size comparison calculator to compare the dimensional properties of spiral staircase with other related elements from our database. The going must be between 230 and 330 mm 9 and 13.

External diameter of the staircase column. If your project includes a hole in the floor likely a round hole for the round stairs that calls for a spiral stair you will want to pay close attention to our well opening size dimensions. Horizontal distance between two step nosings. The angle is a multiple of 360.

The upper floor counts as a step. Select an item on the right to compare relative dimensions to spiral staircase. From there paragon s diameters increase in 6 intervals. These spirals are designed to be used by individuals generally familiar with the stair and are classed as secondary or primary.

The irc stair code permits a 4 3 8 inch space balcony well enclosure guardrail balusters shall be spaced so a 4 inch object cannot pass. Spiral stair building code compliance minimum stair diameter of 60 for a metal stair and 64 for a wood stair 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. It must also take into. For example if you need a 1500 mm diameter spiral staircase the opening should be at least 1600 x 1600 mm finished or a 1600 mm finished diameter.

Although the minimum radius to be considered in a helical staircase is 70 centimeters you should always give preference to stairs with at least 80 centimeters radius. Under staircase dimensions mistake i ve come across several homes where this staircase design mistake has been made. Minimum spiral stair tread width is 26 inches salter s code platforms start at 31 inches wide stair balusters shall be spaced so a 4 inch object cannot pass between. Angle of the steps.

An international building code compliant spiral staircase must have at least a 5 diameter. A primary spiral staircase within a dwelling will need an 800mm clear tread width. When viewed from above the entire spiral is situated within the opening.