Printed from the blog of Lori Greene, AHC/CDC, CCPR, FDAI
Allegion
Email: lori_greene@allegion.com, Blog: www.idighardware.com or www.ihatehardware.com


ShortCodes 4E – Door Swing and Encroachment

Egress doors are typically required to swing in the direction of egress when they’re serving an occupant load of 50 people or more, but there are a few other locations where doors are required to be outswinging even if they are serving a lower occupant load.  There are also some situations where egress doors are not required to be swinging doors, and may be another type of door such as a horizontal sliding door or revolving door.

When an egress door swings into a corridor or another location where the door in the open position may reduce – or encroach upon – the width of the egress path, the limitations on encroachment must be met.  For example, imagine a 4-foot wide corridor with a 3-foot door swinging into it.  If the door is equipped with an overhead stop that stops the door at 90 degrees, it would almost completely block the corridor and could severely impact the means of egress and affect evacuation in an emergency.

There are two points within the door swing that are measured to determine compliance with the encroachment limitations – the position where the door encroaches most into the required egress width (usually 90 degrees), and the position of the door in its fully-open position (often 180 degrees, but not always).  To learn more about door swing, calculating the required egress corridor width, and the limitations on the encroachment of a swinging door into the required egress width, read this Decoded article and then proceed to the quiz questions below.

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ShortCodes Quiz 4E

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