You will need one box for each step.
Build two step stairs.
Nail the risers to the stringers to complete the steps.
Learn about an old school technique to mark and cut stairs stringers without any specialty tools or calculators.
Make the steps 12 deep by 26 5 wide.
Also cut one piece of treated 2 x 4 lumber to 3 long.
2 steps at 9 66 leaving 9 66 from the second step to the hot tub.
Build your top step as you would for a single step.
Rip 1 x8 risers to width and cut to length flush with the outside of the stringers.
Double box steps are built using the same techniques as for a single step.
For instance you could cut 1 in 5 in 2 5 cm 12 7 cm boards to the width of the stairs and install two on each step with a gap between them.
29 3 9 66.
Build your bottom step twice as wide as a single step.
Lay out the stairs by drawing on the outside of the square sliding the square along until it meets the last mark to learn how to build steps.
Fasten the two frames together with the back framing members flush with each other.
This is one of the many ways you could do th.
Add decking on top of your frame.
The simplest way to do this is like a toddlers step stool with 2 steps instead of 1.
But the basics are generally.
To make extra strong steps place 2 in 4 in 5 1 cm 10 2 cm boards on both sides of the center stringer under the treads.
Use the narrow part of the square for clamping the riser gauge and the wider part for the 10 1 4 in.
For each stair cut 10 treads from 2 x 10 lumber and 7 risers from osb sheets.
Clamp the stair gauges to the carpenter s square.
I recommend that anyone building a staircase in there home contact a building inspector to inquire about current and applicable fire building code.
Using two treads on each step minimizes the cracking and cupping that might occur with a single wide board.