1. (50 pts) You are designing the formwork for a 12 inch elevated lightweight concrete slab that will be used as the floor of a commercial office. The concrete unit weight is 100 lb/ ft^3, the self-weight of the forms will be 10 lb/ft^2, and ACI's minimum live load is 50 1b/ft^2. You plan to use 1-inch thick Class I plyform (with face grain across supports), 2 by 4 Southern Pine joists, 4 by 6 Eastern Spruce Pine stringers, and 6 by 6 Southern Pine shoring posts (you have to choose between 4,000 lb, 5000 lb, or 6,000 lb rated shores). Assume members are continuous over 3 or more spans and the allowable deflection of the formwork is a delta of 1/360. Determine the joist, stringer, and shoring spacing and check that all structural elements will be adequate. State any assumptions and their implications. 1. (50 pts) You are designing the formwork for a 12 inch elevated lightweight concrete slab that will be used as the floor of a commercial office. The concrete unit weight is 100 lb/ ft^3, the self-weight of the forms will be 10 lb/ft^2, and ACI's minimum live load is 50 1b/ft^2. You plan to use 1-inch thick Class I plyform (with face grain across supports), 2 by 4 Southern Pine joists, 4 by 6 Eastern Spruce Pine stringers, and 6 by 6 Southern Pine shoring posts (you have to choose between 4,000 lb, 5000 lb, or 6,000 lb rated shores). Assume members are continuous over 3 or more spans and the allowable deflection of the formwork is a delta of 1/360. Determine the joist, stringer, and shoring spacing and check that all structural elements will be adequate. State any assumptions and their implications