How to design L Shaped Stairs Case
If the shape of the stair is like L, it is called as L type stair. In this type of stair, the angle remains 90 degree. This type of stair is supported with landing & two walls in ground level and first-floor level. Height from the plinth level to the first floor should be retained.There is a need for a riser.
Maximum riser size = 7” (inch)
Minimum riser size = 4” (inch)
Maximum tread size = 12” (inch)
Minimum tread size = 10” (inch)
Landing is taken as = 3’ 3”
Tread is taken as = 10”
Riser taken as = 7”
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What Is Estimation and Costing
10 ‘ 6 “height is equivalent to 10.5 inches
Riser is 7″/12 = 0.5833 foot [ 1 feet = 12 inches ]
Tread is 0.8333 feet equal to 10″/12
The number of steps identical to height/riser = 10.5/0.5833 = 18 steps
The length of the landing is 3 ‘ 3 “equal to 3.25 feet
The width is 3 ‘ 3 “= 3.25 ft
Length of stairs is identical to the total stairs-1 = 18-1 = 17
Overall treads = 17 – Landing = 16
Total length of the tread = 16 x 0.8333 [ one tread ] = 13.3328 ft
Landing involves = tread length + landing length + width = 13.3328 + 3.25 + 3.25 = maximum stair length = 19.8328 ft.
