Question 1: a rectangular beam has the dimensions b= 300 mm, h= t = 650 mm. The concrete cylinder strength f=20 MPa, the steel reinforcement bars has yield strength fy = 400 MPa. Calculate the area of steel reinforcement required (use No. 25 bars; diameter 25.4 mm) for a beam subjected to ultimate moment, Mu = 500 KN.m. concrete cover to reinforcement center = 60 mm. t= 65 cm 65 b-30 cm Question 2: Based on ACI code, calculate the area of steel reinforcement required for the beam with a rectangular cross section; width b = 300 mm, total depth h = 700 mm. Mu = 360 kN.m. The concrete cylinder strength f = 28 MPa, the yield point of the steel fy = 420 MPa. Assume $25 (Area= 491mm²/bar) with one-layer arrangement, concrete cover to reinforcement center = 60mm Question 3: a rectangular beam has the dimensions b = 35 cm, d= 80 cm. The concrete cylinder strength f = 28 MPa, the steel reinforcement bars has yield strength fy = 420 MPa. It is required to calculate the safe reinforcements for beams with a limited depth of 80 cm under ultimate design moments of 1. 1000 kN.m 2. 1500 kN.m d = 80 cm Write your comment on the designed section b=35 cm Question 4: For T-reinforced concrete section beam, the concrete cylinder strength f = 28 MPa, the steel reinforcement bars has yield strength fy = 420 MPa. Determine the ACI design moment capacity Mu. Perform necessary checks. 1800 6ф 18 50 250