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Stairs design considerations

Design stairs, parallel double run, want to do a perfect, huh, huh

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Surface width. 600 ~ 620mm that the general step. When the stepping size is small, you can take the tread or make the way to tilt the tread surface. The pick out the size of 20 ~ 25mm, this size is too large when walking is not convenient. 3, railings (or fence) armrest height The height of the handrail refers to the vertical distance from the center of the tread to the top of the handrail. The determination of the height of the handrail is to take into account the convenience of people passing the stairs. General indoor armrest height of 900mm; care in the building staircase handrail height should be suitable for children's body, handrail height generally take 600mm; but pay attention to 600mm at a handrail, 900mm should still be set up handrails, staircase at this time for the double handrails. Horizontal safety of the top platform railings should be appropriate to increase the height of some, generally not less than 1000mm, in order to prevent children through the railing gap and dangerous, the horizontal distance between the railing should not be greater than 120mm. Outdoor staircase handrail height should also be appropriate to increase some, often take 1100mm.
6, the stairs of the clearance height The clearance height of the stairs includes the net height of the stairway and the net height of the platform aisle. The net height of the stairway is the vertical distance from the tread edge (including the range of 0.3 m outside the minimum and highest stepped edge lines) to the lower edge of the protrusion. The height of the platform aisle is the vertical distance between the platform beam and the platform beam. In order to ensure that these parts are not affected by the passage or handling of objects, the clearance height in the platform aisle should be greater than 2m, in the stairs should be greater than 2.2m. In a pair of running stairs, when the first floor platform for the channel can not meet the high requirements of 2m, you can take the following solutions: 1) the first floor of the bottom of the growth, the formation of different stages of the ladder, this treatment must be increased into the depth. 2) the length of the staircase unchanged, lower the floor of the floor of the floor of the floor elevation, this treatment, ladder structure uniform, but the indoor and outdoor floor height to meet the requirements. 3) the combination of the two methods, that is, the use of part of the indoor and outdoor height difference, but also made ranging from running ladder, to meet the stair clearance requirements, this method is more commonly used. 4) the bottom with straight stairs, direct access to the second floor. The length of the staircase is longer and the stairway is longer.
4, the width of the stairs The staircase is one of the main components of the staircase, which is for people to pass up and down, so the width of the stairs must meet the needs of the upper and lower flow and the handling of goods. The width of the staircase is to be determined by the number of shares passing through the flow and the need for special furniture or equipment. General stairs need to consider at the same time at least through the two flow, that is, up and down in the middle of the stairs meet through. According to the human scale per person flow width can be considered to take 550mm + (0 ~ 150mm), where 0 ~ 150mm is the flow of people in the swing of the human body. The width of the staircase and the relationship between the number of shares to be handled properly. Stairs two ladder of the gap that the stairwell, the width of the stairway generally take 50 ~ 200mm. 5, staircase platform width Stairs platform is the connection of the stairs, but also for pedestrians to use a little rest. So the width of the staircase platform is greater than or at least equal to the width of the stairs, which specifies the lower limit of the staircase platform width. In the actual staircase design in the wide platform to determine the specific circumstances of specific analysis.

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