(3) H 22" IN_ 1:3|2|2|2|3| 4 #8 (b) Check if the #8 bars As, reg 2.85 in ² #4 at 8" 0.c. fé=4.000 psi Grade 60 steel Light weight concrete No-Coating. (a) check if 4 #8 Bars fit the beam. are sufficently anchored (I

A simply supported beam (Span = 25 ) has a seetion as shown below with normal-weichs concrete compressive strength fc- 4000 psi (normal weight, and steel reinforcement,fy=40,000 psi  1- find the modulus of rupture of the concrete per ACI318-10 2- find gross section properties to calculate the crracking bending moment (Mcr) 3-check whether the cross section is over -or under -reinforced  4-caclculate the nominal flexural strength of the cross section (Mn)

3. The clear spacing of the main longitudinal reinforcements in mm. A. 140.6 B. 155.3 C. 165.7 D.207.6

Problem 1: Calculate Mn and check the minimum steel limit f'c =4 ksi, fy 60 ksi. 2.5" 25" 6-#9 12" 3.5" 4" 25"

What is the maximum aggregate size that can be used in concrete for the following conditions:

Design economically a 3.70 m x 5.50 m two way slab S-1 as shown using the following data (Based on Philippines Standards) fc’ = 35 MPa fy = 345 MPa Floor finish is slate 55 mm thick Ceiling load is gypsum board 28 mm thick Miscellaneous Loading = 1 kPa The slab will serve as a restaurant (canteen) Use Method 3 and load combination w = 1.2D + 1.6L. Slab S-1 is surrounded by 2.8 m. high CHB wall unplastered with 150mm thick, density of 19.6 kN/m3 and grout spacing of 600 mm with the height of 2.80 m. The wall is supported by beams. For values of coefficient, use interpolation.

1.22 Calculate the design moment strength of the precast concrete section shown in Fig. 3.39 using f = 4 ksi and f, = 60ksi. 6.3" + Canon 14" 5#9 20" 19" 2.5" 2.5"

The cross section of a reinforced concrete beam is shown below .( 5 - No . 10 bars )are designed as the bottom bars and No. 3 stirrups as the vertical reinforcement . Considering a clear cover thickness = 1.5 in , sketch the layout of reinforcement and show bar spacings per AC1318-19 . Assume maximum aggregate size = 1 in and the minimum required effective depth of bottom bars = 20 inches .

A rectangular beam has the dimensions (see Figure) b = 12 in., h - 20 in, and d 17 in. and is reinforced with three No. 9 (No. 29) bars so that As - 3.00 in. The concrete compressive strength fe is 4000 psi, and the tensile strength In bending (modulus of rupture) is 475 psi. The yield point of the steel f, is 60,000 psi. Determine the concrete compression stress at the top fiber caused by a bending moment M- 10 ft-kips. 9- 6.78 in, I= 4067 in, Es= 29000000, E = 3600000 17 in. 20 in. 3 #9 bars (A, - 3.00 in.?) 3 in. -12 in- Select one: a. 390 psi b. 1390 psi c. 200 psi d. 250 psi

Problem 02 Repeat problem 1 using LRFD, PL400X350 mm base plate, W12x120 column, 500x500 mm pedestal, PDL = 1200 kN and PLL = 800 kN. Use A-50 steel and concrete f.' = 30 MPa. Determine the required base plate thickness.