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Guide to the ADA Standards

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When Accessible Routes to Stories/ Mezzanines are Required in Alterations or Additions

Building schematic with stairways highlighted and route to primary function area on upper floor highlighted. Notes: Where stairs or escalators are added where none existed previously and major structural modifications are necessary, accessible routes must connect each level served by the new stair or escalator (§206.2.3.1). As necessary to achieve an accessible path of travel to a primary function area that is altered or that is part of an addition, unless the cost is more than 20% of the cost of the overall alteration (§202.4). All exceptions for accessible routes to stories or mezzanines allowed in new construction also apply to altered facilities and additions.

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