5.2 A one-story exterior platform is shown in the following figure. The roof is one-way slab. Answer the following questions (a through i) and design a one-foot wide strip of the roof slab. One-Story Concrete Platform 20-0 Slab Beam 25-0 b) Determine the minimum slab depth based on ACI Table 9.5(a) 5.1. a) Determine the span length for the slab (assume that the support beams and columns at each end of the slab are 12 inches wide). c) Assume that this slab is 14-inch-thick and it must support 25 psf weight of non-structural equipment and 50 psf code-required live load. Calculate the slab average design loads (in psf). d) Calculate the factored design load: U = 1.2DL+ 1.6LL

The floor beam shown is used to support the 6-ft width of a lightweight plain concrete slab having a thickness of 4 in. The slab serves as a portion of the ceiling for the floor below, and therefore its bottom is coated with plaster. Furthermore, an 8-ft-high, 12-in.-thick lightweight solid concrete block wall is directly over the top flange of the beam. Determine the loading on the beam measured per foot of length of the beam. Assume that the density of concrete slab is 100 lbs/ft3, design load for plaster ceiling is 5 psf and density for block wall is 105 lbs/ft3.

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Problem: The floor frame shown carries a (superimposed) service dead load of 2.2 kPa. Slab S1 is 110 mm thick, while slab S2 is 130 mm thick. A concrete wall| 180 mm thick and 4.0m high is placed directly on top of beam AH. Beams AH, BG, CF, and DE are reinforced concrete rectangular beams 250 mm wide and 500 mm deep, while girders AD and HE are 300 mm wide and 600 mm deep. Weight of concrete is 23.6 kN/m³. Compute the dead load carried by the different beams and girder/s. Also compute the live loads on those same beams and girders using the minimum specified by the code: 1.96 kPa. s1 S2 6.0m 3 @4.0 m

The floor framing plan of a concrete structure is shown blow. The slab reinforcement is 12mm with a clear cover of 20mm. Concrete strength f'c 20.7 MPa and steel strength fy = 275 MPA. The floor is to be designed to carry a dead load and live load pressure of 3.80 kPa (including weight of slab) and 2.90 kPa respectively. If x = 7.50m, y = 6m, and beam width = 300mm, determine the following: a. The positive and negative moment in the slab bounded by CDFE in kN-m using ACI Moment Coefficient b. The maximum spacing at midspan prescribed by NSCP A B C D y E

Q3: A one-way ribbed slab with clear spans (9.6 m 15 m) is covered a rectangular area, as shown in Fig. (3). The tiling load is 1.2 kN/m². For concrete.f'e =28 MPa and Y. -25 kN/m. For steel f, = 375 MPa. The effective cover be (40 mm)? For rib use [8-Ø 16 at mid-span] and [ 2- Ø 25 (add) + 4-0 16 (bt.) at ends ], as shown in figure below. ( b = b; at mid-span and b = b at ends). i. Find the maximum live load for flexural only? ii. Checking for transverse shear? 2-0 25 8-Ø 16 4-016 80 mm 420 mm 220 mm 15 m 830 mm 220 mm 9.6 m

A plywood beam is built up of 1/4-in. strips separated by blocks as shown in FigP-577. What shearing force V will cause a maximum shearing stress of 200 psi?

Problem 2: A concrete one-way slab has a total thickness of 120 mm. The slab will be reinforced with 10 mm diameter reinforcing steel bars with fy = 276 MPa. Concrete Strength f'c= 21 MPa. Determine the required spacing of 10 mm RSB if the total factored moment acting on 1-meter width of slab is 25 kN-m. Clear cover is 25mm. Reduction factor is 0.9.

2. A concrete floor system consists of parallel T-beams spaced at 10-ft on centers and spanning 32-ft between supports. The 6 in thick slab is cast monolithically with T-beam webs having bw = 14 in and a total depth, measured from the top of the slab, of h= 28 in. The effective depth will be taken 3-in less than the total depth. In addition to its own weight, each T beam must carry a superimposed dead load of 50 psf and service live load of 225 psf. Steel yield strength 60 ksi and concrete strength of 4 ksi. Determine the required tensile steel area and select the reinforcement needed for a typical member.

A reinforced concrete beam section is "b" wide and "h" deep. It is to be reinforced with the given diameter and number of pieces below, stirrups is 10 mmØ with clear concrete covering of 40 mm. Consider f'c = 32 MPa and fy = 415 MPa. 1) If the beam is reinforced with 4 - 25mmØ tension steel only, calculate the tension steel strain et. 2) If the beam is reinforced with 6-28mmØ tension steel (in two layers of 3 bars each with 25 mm clear distance between layers), calculate the tension steel strain et. 3) Calculate the flexural strength of the beam in question 2. 4) Determine the total unfactored dead load and live load using the result in problem 3 that the beam can carry if dead load is 30% of the total live load. Use "L" as total beam length. Assume that the beam is simply supported. 5) Determine the superimpose dead load that the beam can carry from the resut in problem 4 if concrete weighs 23.6kN/m3. b 380mm h 520mm L 5.70m