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. Sanitary-type pans, which are com-mon in hospitals, have an additional lipthat prevents dirt from falling into thecorner of the pan.

actual stair step is called the tread, there is also a measure-ment, as shown in Figure 1, which is termed the 'tread'. This is the horizontal distance between two consecutive treads. The rise is the vertical distance between two consecutive treads. Nosing line and nosing points: In order for the stair to be set up properly, every corner of ...

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