Assignment 2: Slab Design Perform structural design of the simply supported reinforced concrete slab shown in the floor plan. The slab must be able to carry its own weight and a live load of 100 psf. The slab thickness should satisfy the ACI stipulations for minimum thickness. Concrete compressive strength f'c = 4,000 psi and yield strength of reinforcing bars fy = 60,000 psi. The slab is neither exposed to weather nor in contact with the ground, meaning it is subjected to interior exposure. Use the reference on "Practical Considerations for Slabs" ● Include references to ACI code and Tables from Appendix A Draw a sketch of the reinforced concrete slab and label all the reinforcement sizes and spacings. A 10 2 B 3 B 49 B Girder 2 # Girder 1 Beam 1 Slab C 由 8 4@33' = 132 D 800 # 60 E Beam 2 3@30' = 90'

How does the addition of air-entraining materials to Portland cement improve the concrete?

Note For Problems 9.6-1 through 9.6-5, use the lower-bound moment of inertia for deflection of the composite section. Compute this as illustrated in Example 9.7. 9.6-5 For the beam of Problem 9.4-2. a. Compute the deflections that occur before and after the concrete has cured. b. It the live toad deflection exceeds L360 , select another steel shape using either LRFD or ASD.

Use the composite beam tables and select a W-shape and stud anchors for the following conditions: Span length = 18 6 Beam spacing = 9 ft Total slab thickness = 51 2 in. (the slab and deck combination weighs 57 psf). Lightweight concrete with a unit weight of 115 pcf is used Construction load = 20 psf Partition load = 20 psf Live load = 225 psf Fy=50 ksi and fc=4 ksi A cross section of the formed steel deck is shown in Figure P9.8-9. The maximum live-load deflection cannot exceed L/360 (use a lower-bound moment of inertia). a. Use LRFD. b. User ASD.

How is concrete consolidated?

Note For Problems 9.6-1 through 9.6-5, use the lower-bound moment of inertia for deflection of the composite section. Compute this as illustrated in Example 9.7. 9.6-4 For the beam of Problem 9.4-1, a. Compute the deflections that occur before and after the concrete has cured. b. If the total deflection after the concrete has cured exceeds L240 select another steel shape using either LRFD or ASD.

If the soil-bearing pressure is 1500 psf and the concrete has a strength of 2500 psi, what size pier is needed to support a load of 4600 lb?

What size does an opening in concrete have to be before a deduction is made from the volume of concrete to account for the opening?

Repeat Problem 20-12, with the slab containing temperature steel in the form of welded wire mesh consisting of 0.125 in.2 steel/ft width. The modulus of steel, Es, is 30106lb/in.2 , Ec=5106lb/in.2 , and h=6inches .