The most economical steel stairs are those that use common materials, standard details, and most importantly, a uniform and relatively simple method of field assembly.
Commonly available A36 channels and plates are very good choices for the main stringers of the stairs, as are angles and tees for the carrier members. Risers and treads are usually made by specialty shops, and it is most economical to use a typical detail in as many places as possible. The stairs should be pre-assembled and shipped directly to the site. The field connections should be simple and straightforward to be accomplished efficiently, and with mininum equipment and labor.
Plates and Connections - When estimating the total tonnage of structural steel, add 10% to the total weight to allow for plates, connections, and waste as a rule of thumb.
Shop-Applied Finish Paint - When the specifications call for the finish coat of paint to be applied prior to installation, allow considerable time for touching up the paint. Every time you lift, move, weld, bolt, or alter the position of a piece of steel, you will need to touch up the finish.
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2011 Light Commercial Cost Data Book
Covers every aspect of light commercial construction pricing for a variety of building types
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2011 Building Construction Cost Data Book
Thousands of unit costs for building components, arranged in the new CSI MasterFormat® 2010 classification system
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