Staircase Design

See attached (there is a part done, although I am not sure if it is correct.).

You are a newly hired architect for Moseley Architects, and you have been tasked with creating the design for stairs connecting floors within stairwell A (pictured below).
Launch:
Using the given code requirements for stairs and the given drawing for the first and second floors, determine the best design possible to connect the first and second floors.
Requirements include:
● 13 feet between floors vertically
● Minimum stair width is 44 inches
● 1 foot horizontal spacing distance between staircase separated by a landing
● Stair width is at least the (Egress Capacity) x (Building SF (sq ft))
● Egress capacity for stairs is 0.3 in/occupant
● For this building use 100SF per occupant
● Maximum vertical travel distance before a required landing is 12 feet
● Landing width must be at least the stair width
● Tread minimum = 11 inch and maximum = 12 inch (step run)
● Riser minimum = 4 inch and maximum = 7 inch (step rise)

Explore:
Show all work for the tasks below. All work is required for full credit!
1. Determine the minimum number of risers and treads needed to connect the first and second floors.
2. Using the minimum number of risers and treads that you found in #1, determine the following dimensions needed for each riser, tread, and stair width while staying within the given requirements.
a. Determine the height of the riser.
b. Determine the length of the tread.
c. Determine the width of the landing.
d. Determine the stair width.
e. Create a drawing for your design stairwell that shows a side view of the stairs and landing.
Label your picture and include the dimensions you found above with units.
3. The building owner has decided to put an exit door under the stair landing. The minimum height needed for this door is 8 ft vertically from floor to landing. Redesign your staircase to be able to add in this exit door.
a. Determine the number of steps before and after the landing.
b. Based on the above number, what is the height of the risers before and after the landing?

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