Spiral Stair Geometry Calculator
Geometric calculator only. Check local building codes.
Rotation
Inside Radius
Running Measurements explanation
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.)
Running Measurements:
Inside Stringer
Mark-out
|
Outside Stringer
Mark-out
|
Inside Plumb
Mark-out
|
Inside Level
Mark-out
|
Left click, release and drag to measure at scale inside diagram.
Spiral Staircase Handrail True Radius Calculator Enter actual rise of handrail for entered angle of rotation.
Be sure to follow local building regulations regarding all stair dimensions.
If you're cutting blocks, concrete, stone or
ANYTHING and there's
DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's
NO DUST -
Silicosis Sucks
What do we think? - They're 2 different things:
A
Meter is a device to measure things - like a Volt Meter or a Parking Meter
A
Metre is about 3'-3~3/8"
Although diameter and perimeter as measurements - don't seem to fit very well
If the US ever goes Metric, you'll be able to use a Meter to measure Meters - A Meter Meter
All Imperial inputs and dimensions are actual physical finished sizes (unless otherwise noted)
All Metric Inputs in Millimetres (unless otherwise noted)
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