Standard Specification for Design of Stairs for Building Stairs
4.1.3 staircase step width should not be less than 0.26m, step height should not be greater than 0.175m. Handrail height should not be less than 0.90m. Staircase horizontal section railings greater than 0.50m, the armrest height should not be less than 1.05m. Stair rails between the vertical bar clearance should not be greater than 0.11m.
4.1.5 When the width of the staircase is greater than 0.11m, measures to prevent children from climbing must be taken.
4.1.2 The net width of the staircase should not be less than 1.10m. Six-story and six-storey residential, while the width of the ladder with a railing should not be less than 1m.
Note: The net width of the stairs is the horizontal distance between the wall and the center of the handrail.
Standard Specification for Design of Stairs for Building Stairs
A: asked the mandatory design of stairway staircase size design. Answer to the application of "residential design specifications" GB50096-1999 (2003 version).
