Directory Metric or Inch

Steel Spine Stair Stringer Geometry Calculator - Metric

Total Rise
Ideal Rise
Tread Thickness
Spine Depth
Check local building codes Geometric calculator only. Check local building codes.
No allowance for nosing (overlap)

Direct measure dimensions from diagram Left click, release and drag in diagram to measure.

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Steel spine stair calculator diagram with full dimensions

Running points up top of spine, to bottom of treads.


Running points up top of spine, to centre of treads (for brackets)


Running Measurements Vertically - Lower Floor to top of each tread (Possible landing heights. Blue = middle)

Cut Templates Print, cut and use the diagram as a template to mark top and bottom spine angles, and tread bracket template.

DON'T BREATH THE DUST 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

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