Q #1: We are working on design of 10-story school in downtown of the major US city. Design calls for roof play yard. Do we need to apply 10 feet rule for re-entry doors leading to elevator lobby? Q #2: Design of another urban school calls for roof garden - do we need permanent walk-off system rules apply to re-entry from the garden?

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Allison Beer McKenzie

Architect, Director of Sustainability

SHP Leading Design

LEEDuser Expert

389 thumbs up

Wed, 05/18/2011 - 12:37

Yes- you should plan for 10' of walk-off system at the building entries from both of these exterior spaces. The idea is to contain particles, dust and dirt before they can get in the building and since you have the opportunity to pick up dirt and debris on the roofs, walk-off surface is required.

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Permanent entryway walk-off systems at least 10 feet long

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