Thread: Stair help
View Single Post
  #2   Report Post  
Posted to rec.woodworking
DerbyDad03 DerbyDad03 is offline
external usenet poster
 
Posts: 14,845
Default Stair help

On Wednesday, November 25, 2020 at 4:13:46 PM UTC-5, swalker wrote:
I need to replace a set of steps that have a rise of 25" and a width
of 53".

The stairs land on a sloped concrete carport and the slope across the
53" is 2 inches.

How do I approach this?

The current stairs have 3 steps and then a small step to the porch.
Totally unacceptable and dangerous.

Thanks for any advice.


You didn't mention the run, but it may not matter for the general concept.

Assuming that nothing can be done to level the floor, you will need to accept
that the rise of the first step will not be even across the width.

53" could be done with 3 stringers ~18" OC. The first thing to determine is
where will most people walk on the the steps. If the center will be used the
most, use that overall rise in your stringer calculations. If there will be a
handrail on the right (or left) and you think that most people will use the
handrail, use that side as the rise in your calculations.

Set the proper rise (consistent with the rise of the other steps) of the first
step at the "most used" area and then add/subtract from the bottom of the
other stringers (or base plate) to compensate for the 2 inch slope.

The goal is to set the rise of the most used area to be consistent over the entire
run.

If after figuring that out, you find that either side of the first step is unacceptable
as far as the rise goes, you should be able to find a number that you are comfortable
with and spread the difference across all steps.

Since it's a carport, I suggest a PT plate at the base but be sure to factor that into
your calculations.