The stairs should be at least 36 inches wide.
How to build deck stairs with a landing in the middle. When the deck or porch is connected to and supported by the houseusually via a ledgerthen the stair footing must be set to the frost depth or deeper for your area. If you prefer to make your own stair stringers use a carpenter square or stair gauges. It is possible to omit landing at the top of a stair serving a secondary entrance to a single dwelling unit provided that the stair does not have more than three rises and the door is sliding or swing away from the stair.
Landing stair can be neglected at the bottom of an exterior stair provided that there are no obstruction within a lesser of stair width or 900mm for stair serving single unit and 1100mm for stair. Remember the landing is your last step not the last tread. You can build your own custom stringers or buy pre-cut.
Project a board or something level with the deck surface to where you would like the stairs to end. The stair railing should include a graspable handrail in most cases. Wood Decking and Railings.
Essentially the technique is use the foundation as a landing area and delete the rest of the floors. There are two ways to attach stair stringers to your deck. But a more common technique is to use notched stringers and secure them to a drop down board behind the rim joist of the deck.
The stair railing posts should be firmly attached to the deck structure or the ground. The horizontal positioning of the mid-level landing is determined by the number of treads on the stair run. Use the first riser as a guide to cut the rest of the risers.
So you make a small landing area where your sims can use your door. ATTACHING STAIR TREADS TO a deck. Clamp the stair gauges to the carpenters square.