deck stairs, how wide?


Old 05-07-03, 08:15 PM
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deck stairs, how wide?

how deep should the stair treads be?
I laid out some planking that was 11",
but they looked narrow and didn't look right,
I checked my cement patio stairs and they were 11"
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Old 05-08-03, 06:51 AM
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You can make deck steps anyway that you want, including little platforms.
For regular steps, I wouldn't make the rise more than 7.5", including the 1.5" thickness of the tread, however.
Mine are 2X12s (11"+, more or less) with a 1X6 riser behind them, for instance. I have three decks. One set of steps is 14' wide, and the other two are 5' wide.
You can make them to suit you.
Good Luck!
Old 05-08-03, 01:10 PM
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Stair dimensioning is largely a creature of building code. For instance, here in NY, the residential code (Section R314) requires tread depth be a minimum of 9 inches, that depth being "measured horizontally between the vertical planes of the foremost projetion of adjacent treads and at a right angle to the tread's leading edge."

And, as if that wasn't enough, "the greatest tread depth within any flight of stairs shall not exceed the smallest by more than 3/8 inch (9.5 mm)."

Similar rules apply to riser height - 8.25 inches MAXIMUM, 3/8 inch consistency as well. They also apply to nosing of the tread - .75 to 1.25 inches, 3/8 inch consistency.

You can usually find the codes from local inspectors office or local library.

Good luck!

John P.
Old 05-18-03, 11:43 AM
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risers from 7" to 8" max. But the best is 7 1/2". The width of step is 10" to 11" plus nosing 1". Architects mostly use these dimensions and they are very common.
Best Regards, Tanya

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