Structural steel design shall conform to the requirements of the AISC “Manual of Steel Construction-Specification for the Design, Fabrication, and Erection of Structural Steel for Buildings.”
A tank designed to ANSI/AWWA D100 standard/API 650 standard requirements and not exceeding 3 meters in height shall be provided with a ladder without a safety cage. Ladders on tanks exceeding 3 meters in height shall be provided with safety cages. The tanks exceeding 6 meters in height, stairway shall be provided.
Platform grating shall be 4 mm thick steel, serrate, galvanized 40 mm channel height. Grating fasteners shall be cadmium plated, punched for 6 mm diameter studs.