Model # 60S
This is a standard spiral staircase that meets UBC
code. The stair is 60" diameter with 30 degree
treads, handrail # 200 (1 1/2") round steel
tubing. The balusters are # 302 (1") square steel
tubing, four per tread, spaced less than 4" apart.
The treads are # 100 (12 gauge) smooth steel plate.
The center column is 4" OD .135 wall tube. The stair
has a standard red oxide primer finish. The carpet
overlay and final paint was done by others at the
job site after installation.
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