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Stairway pitch and width, etc
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BS/EN ISO 14122-1,2,3
BS EN ISO 14122-1 Item 3.1 Access ladders Fixed access ladder with rungs: 75º < Angle≤ 90º Item 3.2 Ladders Fixed ladder with rungs 45º < Angle≤ 75º Item 3.3 Stairways Fixed stairway with stairtreads 20º < Angle≤ 45º Item 3.4 Access ramps Fixed access ramp with slanting plane
0º < Angle≤ 20º
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For the purpose of designing a functional and safe stairway there are recommendations, guidelines and codes of practice that have to be met. Below we have collected an extract of the most important ones that may be helpful at project stage.
BS/EN ISO 14122-1 - Selection of permanent walkways between two levels. Recommended pitches for the walkways, stairways and access ladders mentioned below are shown in the figure below
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