For this building, select the most appropriate gravity system, lateral system, and foundation system.

You are designing a new $30-$story office building in New York City. The owner has approved your conceptual design of a tall rectangular box above a large, open lobby on the ground floor. The geotechnical report shows that the soil on site has a very low $($less than $2$k$/$ft$^2)$ bearing capacity. The geotechnical report does not recommend improving the existing soil as a viable strategy for this project due to site restrictions and time constraints. Instead, the report emphasizes that they encountered bedrock between $20-30$ feet below grade. The owner would like to design the building for hurricane level wind speeds. They would also like to fast$-$track the schedule to minimize interruption on campus. The start date for construction will be in December.

$1.$ The most appropriate gravity system is:

a$.$ steel framing

b$.$ cast$-$in$-$place concrete pan joists

c$.$ cast$-$in$-$place concrete flat plate

d$.$ pre$-$cast concrete framing

$2.$ The most appropriate lateral system is:

a$.$ moment frames

b$.$ shear walls

c$.$ brace frames

$3.$ The most appropriate foundation system is:

a$.$ drilled bell$-$bottom concrete piers

b$.$ mat slab

c$.$ spread and strip footings

d$.$ driven piles