How do I calculate the height & depth of a whole flight of stairs?
*Calculate The Rise Divide Total Rise By Maximum Riser Height – Before you can begin calculating your stair stringer layout, you’ll need to measure the “total rise”. For stairs that land on the ground, the total rise is the distance from the ground to the top of the finished floor. Once you know the total rise, divide this number, by the maximum allowable riser height. According to International Building Code (IBC), the maximum riser height is 7-3/4″. (Other codes limit the maximum riser height to 7″.) *Always Round Up Gives Number Of Risers – For this example, we’ll assume the total rise from the ground to the top of the decking is 53″. Since I personally don’t like risers any taller than 7″, I divide 53″ by 7 and get 7.57. Always rounding up gives me 8 risers. At this point, I now know that my steps will have eight risers. By the way, even if the total rise had only been 51″ and I divided by 7 to get 7.29, I would still round up to 8 risers. Dividing Total Rise By Number Of Risers Gi
