So with a 24 on center and framing lumber being 1 1 2 thick the dimension between the inside edges of the two joists is 22 1 2 24 3 4 3 4.
How do you measure attic stairs.
Position a step ladder under the attic stairs so that you can easily access the ceiling area.
You can stand on the attic ladder to take.
We ll show you how to cut out frame the opening then install a fo.
How to measure your attic ladder for a replacement step 1.
Measure the length from the hinged side of the attic ladder frame to the opposite side of the attic ladder frame.
For smaller attic openings with a minimum measurement of 18 x 24 you will need to measure the swing clearance inside the attic space.
Have your helper below note the measurement.
You should also measure the ceiling height.
Place your measurement along the edge so that your measuring tape stays in a straight line.
This is called the rise of your measurements and will determine how high your stairs will go.
Measure the rough opening s width and length in three different spots at the top and bottom of the framing.
Measure the height or rise of the space you want to make stairs.
Measure and verify the amount of space available to swing out the stair sections of your ladder this extends beyond your attic opening.
How to measure for attic stairs 1.
Close the attic ladder up fully and place a stepladder underneath it.
Extend the tape measure so that it reaches from the ceiling to the floor.
Using a tape measure make measurements of the total height of the space you want to make stairs from the bottom to the top.
The next measurement will be for the length of the stairs.
That s dimensions between the framing of your attic joists which is typically 24 on center.
Leave room for extending the measuring tape.
Stretch a tape measure along one of the long sides of the stair opening and write down the measurement.
Hold the tape.
How do measure pull down attic stairs.
Installing a pull down attic ladder is essential for safer easier access to your attic.
Attic ladders are sized based on the rough opening.
You ll need at least three critical measurements.