The tread size min 10ins 25 4cm is dictated by the average adult foot size although it is not necessary to be able to fit your entire foot on a tread in order for walking up the stairs to be both comfortable and safe.
Spiral staircase dimensions metric.
H the height of the staircase usually determined by the distance between the floors in your house.
Use our size comparison calculator to compare the dimensional properties of spiral staircase with other related elements from our database.
Flat radius to handrail angle of rotation.
Spiral stair profile diagram with full dimensions spiral staircase handrail true radius calculator enter actual rise of handrail for entered angle of rotation.
Select an item on the right to compare relative dimensions to spiral staircase.
A guard is a building component or a system of building components located.
Select and re calculate to display.
Dwg metric meters jpg.
D1 internal diameter this is the diameter of the central column.
Our spiral stair building code and ibc stair code specifications provide technical details about the different code and non code packages we offer for commercial and residential projects.
When it comes to spiral staircase dimensions what size the diameter should be is an extremely common question in which there is no straight forward answer as it depends on the usage of the staircase.
Spiral staircase dimensions what size do you need for a spiral stair.
Building codes generally suggest that stairs be at least 36 inches 91 44 cm wide.
The riser height max 7 ins 19 7cm is limited by the way in which we come down the stairs.
The requirements for spiral staircases in the uk are described in.
D1 staircase overall diameter determined my the distance between end points of two steps which point opposite directions.
When you think of spiral stairs you might imagine round stairs with a beautiful 360 degree spiral that has a whimsical winding shape.
A handrail is a railing that runs up a stair incline for users to hold when ascending or descending a staircase.
The walkline is located 2 3 of the way along the stair width measured towards the inner handrail method 4.
Running measurements vertically lower floor to top of each tread possible landing heights blue middle to calculate and display upper floor opening and stair head room enter upper floor thickness check the show head room check box and drag the head slider to calculate and animate diagram head room and floor opening.
The walkline is located half way along the stair width method 3.
The walkine is located 50 cm 20 from the inner handrail or in the centre if the stair width is less than 1m 40.
Stair width does not include handrails.
These specifications show standard stair dimensions for height tread degree rotation degree and many more details for each salter spiral stair product type.
As a custom shop we can build your stair to your specification so standard stair dimensions don t have to be so standard.
Decimal inch or metric mm.
Z thickness of steps usually is a geometric parameter of the material e g.
