The 7 11 rule means the risers or vertical boards at the back of each step are no higher than 7 inches.
Making stairs wider.
Some builders use the 7 11 rule to create comfortable and safe staircases.
The landing is made of concrete pavers set in a sand bed.
Staircase code states that stairs must be 3 feet wide or wider.
The tongue is the narrower leg of the framing.
This includes the recommended 3 4 to 1 1 4 inch overhang.
Most interior steps are built from either hardwood composite material or plywood and can be remodeled for more width.
The wider the treads the more total run the stringers have to span.
Attach the other gauge to the body of the square at the run dimension.
The stair riser must measure 8 to 8 1 4 inches high.
If your treads are 10 inches wide and do not overhang you can add a 1 1 4 inch overhang by replacing them with treads made from 1 by 12s that are actually 11 1 4 inches wide.
Stairs with 14 inch runs tread widths should have rises of between 5 1 2 and 6 1 2 inches.
As long as the 3 foot width standard is met you can expand the stairs width as far as you wish.
At the same time staircase code measurements do allow for some flexibility since most measurements are accompanied by minimums or maximums.
Now when handrails are introduced they shall not project more than 4 inches on either side.
When you notch stringers you weaken them.
For stair treads less than 9 inches deep secure a new deeper tread directly on top of the existing tread.
A prime example is the standard stair width.
It s not as difficult as you.
Use the narrow part of the square for clamping the riser gauge and the wider part for the 10 1 4 in.
A stair tread should be at least 9 inches deep.
Stair width the minimum width for stairways shall not be less than 36 inches clear.
For a typical staircase the stair tread must measure 8 1 4 inches to 9 inches deep measure 1 inch thick or more and have a maximum 1 1 2 inch deep nosing.
Cut lumber to be at or slightly longer than the tread run in width and as long as the stairs are wide or just wider if you prefer a slight overhang on the ends of your stairs.
Secure the treads to the steps of the stringers with 2 5 in 6 4 cm screws over each stringer.
Clamp the stair gauges to the carpenter s square.
This will create a stair stringer calculator.