We just finished framing this warehouse, and now I need to build a set of stairs up to the storage space above the office.
The distance from the floor to the top of the platform is 107 3/8”.
For commercial stairs the SEVEN ELEVEN rule applies- no more than a 7” rise and no less than an 11” run.
107 3/8” divided by 16 risers gives me a riser height of 6 11/16”.
Here I set the inside of my square at 6 11/16” and 11” to mark out the rise and run.
I like to use these stair guides- once they’re tightened down- they hold the square in place, so I don’t have to check the measurements each time.
After I cut the first stringer, I use it as a pattern to trace the others- this way they’re exactly the same.
I subtract one inch off the bottom of first riser, so when I install the one-inch-thick tread I’ll still have a 6 11/16” from the floor to the top of the tread.
Next, I use my circular saw to cut everything out- I’m careful not to overcut so I don’t weaken the stringer.
It’s fun to knock these out with a karate chop, but it’s better to finish the cuts with a reciprocating saw.
I want to make sure this first stringer fits perfect before I cut the rest.
Looks good- it sits flat on the floor and the runs are level.
Be sure to like and follow so you don’t miss the rest of this stair project. @hausplans
#build #howto #stairs #construction #construction #diy #contractor #tools #framing #carpentry
29 май 2024
