Building construction stairs, the ladder width is the number of time, need to add in the middle of the handrail? Before the teacher said 2.5, some said 1.8, should be how much?
0 ~ 0.15m for the flow of people in the swing of the human body, public buildings, many places should take the upper limit. So 0.55 (0.7) * 4 = 2.2 (2.8), the middle should be added handrails.
The width of the staircase between the wall and the center line of the handrail or the handrail shall be in accordance with the provisions of the fire safety regulations. The width of the staircase for the main traffic for daily use shall be based on the characteristics of the use of the building, The flow of people to 0.55 + (0 ~ 0.15) m number of people to determine, and not less than two streams
Stairs at least one side of the handrail, when the width of the stairs to reach the three shares of the flow, should be on both sides of the handrail, to four flow, should be added to the middle of the handrail.
