This is the sort of spiral staircase that would be used in a warehouse or factory; designed to have its base set in concrete, its lightweight framework structure can extend several storeys up with minimal outside bracing. Built around 2-inch RHS steel piping and metal mesh for flooring. it is very robust. With its steep climb - the risers are 10 inches apart - it makes for a 10-foot separation between floors. #ack #climb #industrial #modern #spiral #staircase #steps
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