Calculating Stairwell Rough Opening

When you are framing a stairwell opening into a floor, getting the size right is critical - too small and you'll have to fix it to pass your final inspection. This video goes through the calculation in both metric and imperial using headroom requirements from the BC building Code 2012.

[@creedjo4018]

Simpler is even better
D = Finish floor to finish ceiling + H = Head room desired ÷ Rise per step × Run per step + 3 inches (Head wall finish, riser board, and over hang nosing) = Rough Opening

[@kirrasurf102]

What people make 15 minute videos out of. Excellent

[@larrykaminski8206]

how do you calculate the stair angle? with rise and run of step. I have an opening of no stairs running to basement, total rise is 94" rough opening is 102" code for head room is 80". what is step rise and step run to get 80" head clearance? 94" is on the left, basement floor to top of first floor. left to right is 102".
My calculations come out to about 8.25 rise and 9 inch run with 10 Inch step. 94 and 102 cannot be changed.

[@creedjo4018]

There is also a way go figure un equal pitch hip roofs somewhat easily.
Fistly: slope and pitch are not the same. One is the slope over the run, pitch is over the span.
Example on a equal pitch roof a 8/12 slope is over the run and a 8/24 is over the span. So a 8/24 pitch
Is a 1/3 pitch roof and the total rise is 8 feet

[@akshaykumarsj3491]

Sir how to increase head room hight after concrete work

[@L.J.01]

I'm trying to figure out the average finished opening/hole needed for my floorplan sketch of a small retirement house that my husband and I want to build, if the basement ceiling is going to be 8 feet, or possibly 9 feet (dependant on what we can afford). I think the engineer can figure out the exact measurements for finished plans. But without understanding risers, etc, is it possible to get an idea (without building knowledge) of how many feet I need to allow for the opening of a straight staircase for my rough floorplan drawings? (For both the main floor and the basement.)
Maybe there is a simple and free or inexpensive design tool I should use that includes this info? Does anyone have any recommendations?
Thank you!

[@creedjo4018]

Simple is best?
Run over Rise as a faction (11÷7) = about 1.571 x H +3 inches.
H = finish floor to finish ceiling + head room requirement.

[@zacheiriksson]

Any chance you could do a quarter turn?

[@thangrom5795]

we are in US and he used metric make video more confuse

[@rossswinton5061]

12:40: 3168 + 75 = 3243

[@MBTUE]

I really liked the video until you switched to metric. It just makes things confusing. Great explanation though. Thanks

[@MAVENdeNYC]

He went back to imperial on the last example. Simple division to convert (25.4).

[@jacobgilbertson7944]

Therefor, triangle lol 😂