I have a project to layout a spiral stringer.. its a 3/8" plate stringer with a 39 foot inside diameter, 2'-6' wide steps going up around a tank is there even a layout for this?
I have a project to layout a spiral stringer.. its a 3/8" plate stringer with a 39 foot inside diameter, 2'-6' wide steps going up around a tank is there even a layout for this?
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