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Anonymous users2024-02-12Let me ask you a question: there is a four-story residence, the size of the stairwell is 2700mm, the depth size is 5100mm, (all are axis sizes, the wall thickness is 240mm), the floor height is 2800mm, try to determine the tread height, tread width, flight width, platform width, and flight length of the staircase! It's an exam question.
Answer: One step high: .
Calculation: The floor height is 2800mm 2 1400mm (total height of the tread section). 1400mm÷（8＋1）＝
Two tread plate width: 280mm.
3. Ladder width: 1200mm.
Calculation: The net bay is, the bay size is 2700mm, the wall thickness is 240mm, 2460mm: (2460mm, the ladder is 60mm), 2 1200mm.
Fourth, the platform width: 1310mm.
Calculation: net depth, net depth net size 5100mm wall thickness of 240mm 4860mm. The net depth is 4860mm, and the horizontal length of the tread section is 2240mm.
Horizontal length of five step sections: 2240mm.
Calculation: Assuming that the tread width is 280mm and the tread is 8, then 280mm 8 2240mm. (Check the net depth of 4860mm: platform width: 1310mm 280mm 8 1310mm 4860mm).
Six-seam width (ladder well): 60mm.
Calculation: 2460mm 1200mm 2 60mm.
Because it is a test question, let's talk about the requirements: because the premise is a four-story house. We take the stair tread width and height of 280mm.
It conforms to the "General Principles for the Design of Civil Buildings" GB 50352-2005 minimum width and maximum height of stair treads. The width of the platform is 1310mm and the width of the flight is 1200mm, which is in line with the "General Principles" The width of the platform should not be less than the width of the run, and should not be less than. "Residential Design Code" GB 50096-1999 (2003 edition), the new GB 50096-2011 came into force on August 1, 2012.
The width of the flight we have taken: 1200mm; In accordance with its provisions, the net width of the stair run should not be less than. For residential buildings with six storeys or less, the clear width of the staircase with a railing on one side should not be less than 1m.
Note: The clear width of a stair run is the horizontal distance from the wall to the center of the handrail.
The stair tread width should not be less than and the tread height should not be greater than.
The width of the landing should not be less than the width of the run, and should not be less than. and other requirements.
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Anonymous users2024-02-11Tread height: Tread width: 300 flight width, flight width: 1180 platform width: 1230 flight length, flight length 2400
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Anonymous users2024-02-101. Wooden floor.
mm thick DS mortar screed.
3. Reserve 10 steel lifting rings in the reinforced concrete floor, 1200 in the middle and 1100 in the longitudinal direction
4. U-shaped light steel keel CB60X27 middle distance 429, No. 10 galvanized steel wire boom, middle distance transverse 800, longitudinal 429, the upper part of the boom is fixed with the concrete slab reserved steel bar lifting ring.
Thick paper-faced gypsum board, fixed with self-tapping screws and keel Thick water-resistant putty surface layer.
7. Paint finish.
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Anonymous users2024-02-09b support reaction force 11kn upward; A support reaction force 5kN upward. That's it.
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