A concrete pad is formed to terminate the two tread run from the landing above.
Concrete pad for deck stairs.
Therefore if you anchor the stairs of an attached deck to a cement pad it must have footings under it to the frost line like any of the other deck footings.
You have many choices you can attach your step stringers to your rim joist of the deck with a header and then use a ground contact rated pressure treated footer at the bottom or you can go an additional step and pour a pad at the bottom of your steps and attach your post and stringers there.
A concrete landing for your deck stairs will always result in a stronger stairwell.
Attaching deck stairs to footings one of the easiest ways to attach deck stair footings to concrete is through the base plate.
Concrete landing a concrete landing is the most permanent and stable solution for your deck stair landing.
When building a landing for deck stairs typical codes require the pad to extend beyond the steps about 36 inches behind the steps about 12 inches and on the sides of the steps about 6 inches.
A typical pad has a 4 inch layer of gravel underneath and about 4 inches of concrete on top.
Attach the short stringers to a 2x nailer bolted to the pad.
After setting and filling the form screed the concrete flush with the top of the form and trowel it smooth.
Always follow building codes when installing.
Once the pad has cured the stairs from the landing can be built.
A concrete pad does not require the footings to rise above grade like other landing types.