Accepted physical Stair A geometry
NoneGenerated surfaces are zero-thickness evidence aids, not physical tread, riser, landing, stringer, soffit, rail or slab-opening construction.
Drawing notation: BASEMENT FLOOR PLAN / UP 22 R / 9 TREADS @ 10 1/2" = 7'-10 1/2" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
Basement Stair A plan around Elevator No. 1.
Drawing notation: 1ST FLOOR PLAN / UP 36 R / 10 TREADS @ 10 1/2" = 8'-9" / 12 TREADS @ 10 1/2" = 10'-6" / MARBLE TREADS AND RISERS / BRONZE HANDRAIL
First-floor Stair A plan around Elevator No. 1.
Drawing notation: 2ND FLOOR PLAN / 11 TREADS @ 10 1/2" = 9'-7 1/2" / BRONZE HANDRAIL
Second-floor Stair A plan and upper flight.
Drawing notation: SECTION A-A / SECTION C-C / SECTION D-D / SECTION E-E / MARBLE WALLS / MARBLE PANELS / PLASTER CORNICE / BRONZE HANDRAIL / HOSE CAB.
Sections establish the three-storey relationship and finish/component identities; they do not by themselves register the stair in building X/Z.