Only buildings issued a permit before October 1995 where a fully conforming exit stair is not practical due to Landmarks regulations or site constraint will be considered. The building includes not more than 6 DU's and each ladder serves only a single unit.
Every ladder is supported at grade or by the deck and includes wall brackets for stability.
Each request for approval must include complete specifications including ladder width, rung size and spacing, and if collapsible, operation information. A continuous and unobstructed minimum 3' wide exit path at grade to a public way must be provided. A spiral stair may be acceptable without the Commissioner's approval.