A few nice cnc engineering solutions images I found:
Image by Caliper Studio
Center stringer comfort stair connects two office floors in Starret Lehigh developing. Stringer and slab edge assemblies are blackened. Twenty four stainless steel treads are welded to the stringer type a continuous ribbon. 1 1/4" diameter handrail posts are continuous bent "C" shapes that wrap about treds and are welded to stringer. Stair was delivered to internet site in one particular piece [24′ extended 3′ wide 3′ tall @ 2000lbs. Glass is two 1/2" layers of low iron tempered glass with PVB interlayer. Every panel is a 148.375"x41.25" rectangle that weighs 522lbs. Cut out in concrete floor is trimmed with a box of 1/2" thick blackened steel that was fully prewelded in the shop. The box picks up the load at best of stair and serves as a custom base shoe for the glass.
Style by Diller Scofidio + Renfro
Detailing, Fabrication and Installation by Caliper Studio. Caliper Studio engaged Eckersley O’Callaghan & partners for engineering solutions.