Staircase
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The document discusses requirements and design considerations for stairs. It notes that stairs should be located for easy access and good lighting/ventilation. Width depends on use but domestic stairs generally need 90cm and public stairs 1.5-1.8m. Stairs should have 3-12 steps with a pitch of 30-45 degrees. Headroom should be over 2.1m. Handrails are required on open stairs. Step dimensions should have a going of 25cm or more and a rise of 10-15cm. Construction material must provide strength and fire resistance.
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Staircase
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- 12. Prepared By: Prof D.V.Patel Requirement of Good Stair 1. Location : It should be so located as to provide easy access to the occupants of building It should be located that it is well lighted and ventilated directly from exterior. It should be located as to have approaches convenient and spacious. 2. Width of Stair: It Should be wide enough to carry the user without much crowd or inconvenience. Width of stair depends up to its location in the building and the type of the building itself. In Domestic building 90 cm wide stair is sufficient In Public building 1.5 to 1.8 m width may be required. 3. Length of flight: From comfort point view, the number of steps are not more than 12 and not less than 3. 4.Pitch of stair: Pitch of stair should match with the French Theory The labor of moving vertically is about twice that of moving horizontally if the average human stride is taken as 23 inches. Pitch should however, be limited to 30 degree to 45 degree.
- 13. Prepared By: Prof D.V.Patel 5.Head Room: The clear distance between tread and soffit of the flight immediately above should not be less than 2.1m to 2.3m, so that even tall person can use the stair with some luggage on its head. 6.Balustrade: Open well stair should always be provided with balustrade, to provide safety to the users. Wide stair should have hand rail to both sides. 7.Step Dimensions: The going should not be less than 25cm though 30 cm going is quite comfortable. The Rise should be between 10 cm to 15 cm. Width of landing should not be less than width of stair. 8.Material of Construction: The material used for construction of stair should be such as to provide sufficient strength and fire resistance.
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- 20. Prepared By: Prof D.V.Patel Stairs Classification Straight Stair Quarter turn stair Half Turn (Dog-legged and open well stair Three-quarter turn stairs Bifurcated stair Continuous Stair Turning Stairs Newel Stair Well or Open newel Stairs Geometrical Stairs
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