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The Iron Shop® also offers fully fabricated spiral staircases that require no assembly. Treads, railing, spindles, and pole are welded together to form an. SPIRAL STAIRCASES. Why choose spiral staircases. 56 - 57. Standard staircase. 58. Right / left turning staircase. 58. Protective cage. 58. Weland detail Weland's spiral staircases are used in most environments, for instance, stores etc. The spiral staircase is a sleek furnishing detail that appeals to most people. typical kits, but they come with many fine details ordinarily found only on custom stairs. Enclosed tread ends, intertwined balusters, 1” round steel balusters, and DETAIL D. SCALE 1 : 10. Tread support plates from 10mm THK plate, ribs Stair Steelwork may need to be manufactured in 2 sections to allow installation on SPIRAL STAIR KIT INSTALLATION MANUAL. Effective January 1, 2014. Broomall, Pennsylvania. 1-800-523-7427. Ontario, California. 1-800-382-IRON (4766). “A Stair is a system of steps by which people and objects may pass from one level of a building to Some of the functional requirements of staircases are;. •Stability spiral stairway. stringer or . the stair, balustrade details etc. 3. Specify all