DETAILING STAIRS - AISC

Modern Steel Construction / October 1999 DETAILINGSTAIRS:Basic Principles & Common PracticesBy Andrew J. BellerbyThis article is designed to provide anintroduction to DETAILING STAIRS . Itexplains the basic principles and com-mon practices of DETAILING STAIRS , both byhand and with automated programs. Covered in this article are typicalstairs in American and Canadian indus-trial and commercial buildings, wheregrating and concrete-filled pans areused. This article does not cover orna-mental or circular :The tread is the piece of steelthat makes up the steps of the 1: StairTerminologyThe tread can be made from grating orfrom pans (both shown in Figure 1).Grating is typically used in industrialbuildings while pans are usually used incommercial structures. The grating typeof tread is plate, but the pan shape dipsdown so that the concrete can be pouredinto its base.

the stair, producing the drawing and drawing the connections, can be completed in less than 10 min-utes. Conclusions Stairs can be detailed manual-ly in 2D, or automatically in 3D. Although complex, manual draft-ing is very common and is widely used. Automatic detailing of stairs in 3D is becoming increas-ingly common because it is sim-

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