How To Calculate The Numbers Of tread And Riser In Staircase
Let us calculate the number of riser & tread for the below-given drawing.
First, let us assume the riser depth as =160mm.So, the number of risers= landing height ÷ riser height.Top to top landing height= Top to bottom height of landing + landing thickness= 1300mm + 200mm.= 1500mm.The no. of risers
= 1500mm ÷ 160mm
= 9.375 nos.
As the risers should be the whole number, let us provide 9 nos. of risers & we will divide the landing height with the number of rises to get the corrected riser depth.
The actual height of the riser
= landing height ÷ no. of risers
= 1500mm ÷ 9nos.
= 166.66mm .
Now, the number of treads
= number of riser – 1
From the above drawing, you can observe that the total no. of treads is always less by one from the given no. of risers.
So, the number of treads.
= 9 nos – 1
= 8 nos.
The tread width
= horizontal clear span between landings ÷ the no. of treads.
= 2000mm ÷ 8nos.
Thank you for going through this article. Have a good day.