Shop Built Tanks, Specialty / Custom Fabrication and Field Erected Storage Tanks. Tank Field Construction – API 650, API 620, AWWA D100, ASME, NFPA ATEC Steel offers turnkey construction services for field. Spiral Stairs, Handrails and Platforms Tank Repair and Maintenance – API 653. At ATEC STEEL, we build the BIG Tanks.
Spiral stairs for storage tank![]() Spiral stairs for storage tank![]()
Customer has requested this instead of the usual ladder/cage, never prepared drawings for one before.
Anyone have experience with these and care to share some insight: 1. What program was used to model it? Trying to do it in Bricscad but it's 3D capability is not up to snuff. Main issue is modeling the channels to form around a helix. 2. Where can one find any standards? Only PIP specs. I've found are for linear type stairs. The basic design we were going to go by: Vessel: 204' OD Height: from to grade to top of grating/platform = 235' Span: roughly 120 degrees. Too steep? Stair Risers: channel 12x20.7#/ft handrails: 2.5x 2.5x 1/4 angle treads - 12-1/8 x 36 galv. grating Any help or insight would be greatly appreciated! Comments are closed.
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