Thread: tread depth in 1985?

Anyone know when changes were made to interior stair tread depths over the decades? Found these funky stairs against a wall and the middle treads were fine but the other two sides had a depth of 7". I don't think this was common/allowed in the 80's as it would have been in much older houses. Of course, no handrails. Any input?

Originally Posted by Randall Clark

Anyone know when changes were made to interior stair tread depths over the decades? Found these funky stairs against a wall and the middle treads were fine but the other two sides had a depth of 7". I don't think this was common/allowed in the 80's as it would have been in much older houses. Of course, no handrails. Any input?

1986 CABO says 9" minimum from bullnose to bullnose.

Give or take an inch probably isnt as big a deal as unequal tread depths among the tread would be. Unequal tread depths are a trip hazzard.