How many steps are there in a flight of stairs
A normal one-story building should have 13 stairs for single running and 26 stairs for double running. This situation should be more accurate according to the nature of the building, because the overall height of some buildings is different from that of commercial housing, and the height of the building determines the number of stairs.
If you live in a commercial building, the clear height of the general floor is less than three meters, then the fire escape of the general floor is set to two runs, which is the 26 steps we mentioned earlier. However, if it is a commercial building, its clear height should be at least 5 meters, so the number of steps should be more, which should be around 32 levels.
What are the requirements for stair tread design?
1, classification of stairs and selection of angles
The classification of stairs is common, such as reinforced concrete stairs, steel stairs, wooden stairs, villa stairs, wrought iron stairs, glass stairs and so on. When building and designing stairs, we should consider whether people are comfortable walking on the stairs and the state factors of time and space needed for climbing. These are all related to the slope design of stairs.
The connecting line of each point at the front edge of each step in the stair section is called the slope line, and the included angle between the slope line and the horizontal plane is the slope of the stairs. In the design specification, the gradient of indoor stairs is generally 20 degrees to 45 degrees, and the most suitable gradient should be set at about 30 degrees. If there are any special functional requirements, the gradient will be different.
For example, to build a ladder, the slope should be above 60 degrees. If it is a dedicated staircase, generally choose an angle between 45 degrees and 60 degrees. If it is the slope of outdoor steps, it should be between 14 degrees and 17 degrees. If it is a ramp, the slope should be below 15 degrees.
2. Data design standard for each floor of indoor stairs
The height-width ratio of stair tread is determined according to the slope of stairs and the data of different people stepping under normal circumstances, which meets the requirements of safety, convenience and comfort for most people to walk.
If the staircase is designed indoors, the clear width of each section should not be less than 1.4m, the step height should not be greater than 0. 16m, and the step width should not be less than 0.28m If it is an outdoor staircase, the step height of each flight should not be greater than 0.15m, and the step width should not be less than 0.3m..
3. Design principles of stair handrails
First of all, we must ensure the safety of people. Stairs play the role of paths indoors. So safety is the most important thing when people walk. Whether stairs are safe or not depends on their bearing capacity, especially glass stairs. It is important to bear the weight of a family. In order to ensure the safety of users, anti-skid measures can be taken after the stairs are designed and installed, and some anti-skid mats can be used.
Handrails must be comfortable for people to hold in time during walking. Because the tiger's mouth is generally 5.5 cm, the diameter of the general handrail is preferably 5.5 cm, which will be very comfortable to hold.
Generally, the height of stair handrail is the most suitable at the waist, which is between 80- 1 10cm, so when choosing the height of stair handrail, it should also be between 80- 1 10cm.
After the above specific introduction, everyone is familiar with the answers to questions such as how many steps there are in a staircase and what are the requirements for staircase design. This concludes the introduction of stairs. People must know the design requirements when they understand the steps, so that people can have a deeper understanding of the steps they usually contact and have more understanding of the steps.