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Technical Design Solutions for Theatre by Don Harvey, Ben Sammler

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Kevin Hines

Flexi-Pitch Escape Stairs

Up to a point, saving time and money by using stock escape stairs is a good practice, but too many fixed-pitch escapes are pressed into service even when they aren’t exactly the right height. Such practice is inelegant at best and unsafe at worst. Furthermore, as many technicians and manufacturers have discovered, it is ultimately unnecessary. This article describes a design for a variable-pitch staircase.

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FIGURE 1: A 4-TREAD FLEXI-PITCH STAIR SET AT THE EXTREMES OF ITS USABLE RANGE

GENERAL DESCRIPTION

The carriages of these open-riser stairs consist of two parallel lengths of tube steel which serve as ...

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