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Total Rise
Ideal Rise Actual
Inside Radius Decrease Inside Radius Increase Inside Radius
Tread Length
Inside Run  
Tread Depth at from inner
Widen outer trread  
Rotate     Rotate
<- fine   fine ->

Check local building codes Geometric calculator only. Check local building codes.



Rotate   Rotate
< fine   fine >

Decrease Inside Radius Rad Increase Inside Radius

 






See Printable Arc Templates to create printable paper templates.



Running Measurements (explanation below)

Inside Stringer

Mark-out
Outside Stringer

Mark-out
Inside Plumb

Mark-out
Inside Level

Mark-out

Inside Stringer = tread points winding up and around INSIDE of stairs, from top of first rise to upper floor.
Outside Stringer = tread points winding up and around OUTSIDE of stairs, from top of first rise to upper floor.
Inside Plumb = tread points vertically (plumb).
Inside Level = tread points around INSIDE LEVEL, (or flat, as marked AROUND a circle on the floor.)


Measure at scale Left click, release and drag to measure at scale inside diagram.



Calculates geometry for Spiral, Circular, Tower and Storage Tank Stairs.


Follow Local Building Regulations Be sure to follow local building regulations regarding all stair dimensions.

Print Tickets Need to print numbered tickets? Design Tickets Free Online and Print on your Printer! Easy Step by Step Instructions. No Limits.

Use your iPad or Android Tablet On-Site Your iPad or Android Tablet is a valuable On-Site tool! Print Diagrams

Lay your tablet on an angle to directly measure angles and automatically enter them into Roofing and Pitch Angle Calculator Apps.


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Contact me - Greg Tarrant - Blocklayer.com Builders + Tradies Calculators
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ALWAYS CHECK WITH YOUR LOCAL BUILDING AUTHORITY BEFORE LAYING OUT
OR BUILDING STAIRS, AND FOLLOW ALL LOCAL CODES


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