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northwoodsmudma 11-14-2010 04:02 PM

basement stairs
Could anyone help me figure out how to calculate for stairs going to my basement? I have a total rise of 7 foot 4 inches, total run to a wall of 8 foot, (need 3-4 feet to get appliences up and down) and a head height of 6 foot 6 inches any help would be great. thanks Mike

Keith Mathewson 11-14-2010 04:44 PM

Send me your email address and I'll send you some pdf's

northwoodsmudma 11-14-2010 05:01 PM

my email is Thanks alot

Keith Mathewson 11-14-2010 05:47 PM

Check your inbox. The drawings assume a 3/4" subtread so you will need to adjust accordingly or install subtreads.

fixit4u 11-14-2010 09:26 PM

With those dimensions it is impossible to fit it in to meet any code requirements, is there room to put a landing and a second set of stairs going in a different direction.

Keith Mathewson 11-14-2010 09:53 PM


That's the design based on the info provided. In order to design a code complaint stair one has to know the size of the stair hole and the finish to finish rise as well as the lower finished floor to finished ceiling height.

northwoodsmudma 11-14-2010 10:16 PM

Keith, thank you for helping me, my stair hole is 3foot 3 inches wide by 4 foot seven inches long, the finish basement concrete floor to finish top floor is 7 foot 4 inches, and from the basement floor to finish ceiling ( floor joists) is 6 foot 6 inches. I can take pictures if helpfull thanks again. i will look at my email from you now. Mike Also, from the start of the stair opening to the exterior wall is only 8 foot.

Keith Mathewson 11-14-2010 11:08 PM

Send a pic.

This has to be an old house, I've never seen a stair hole that is only 57" long. If a stair was there at one time it had to be very shallow and very steep.

A stair hole that is 57" long and a floor to ceiling height of 78" cannot be made code compliant. Minimum head room measured at the nosing has to be at least 80" and yours is 78" standing on the floor. As such there is no room for a landing, winder etc. The only stair that comes to mind would be a circular stair and that would not work for your needs. I.E. moving a washer etc. up and down.

northwoodsmudma 11-15-2010 07:23 PM

Yes the house is pretty old, I will send pics once I figure out how thanks Mike

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