A column 425mm x 425mm supports a dead load of 850kN
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- A square footing is proposed to be used to support a 500 mm x 395 mm RC column loaded with 666 kN dead load and 858 kN Ilive load. The bottom of the footing is 1.9 m below the ground. Assume soil weighs 19 kN/m3 and the allowable soil bearing pressure is 302 kPa. The thickness of the footing is 478 mm. f'.= 21 MPa and fy = 420 MPa. It is to be reinforced with 20 mm diameter. Use 24 kN/m3 as the unit weight of concrete. What is the size of the footing required in mm?A flexible circular footing of radius R carries a uniform pressure q. Find the depth (in terms of R) at which the vertical stress below the center is 20% of q.1) A footing whose one side spans 4.2m carries a 520 kN dead load and 640kN live load from a reinforced concrete column. The column measures 500mm parallel to the long side of the foundation, and 800mm on the other side. Assume effective soil bearing capacity of 80kPa, concrete compressive strength of 21 MPa, and steel yield strength of 280 MPa. Determine the following: • Dimensions of the footing (use 100mm increments) • The thickness of the footing (use 10mm increments) • Number of 20mm reinforcements along each dimension
- 5-A 10ft continuous flexible strip footing is subjected to a load of 500 psf. Find the change in stress A - Below a point 3ft deep and 6ft perpendicular to the center of footing. B - Below the edge of the foundation at a depth of 3ft. C - Below the center of the footing at a depth of 3ft.A 5 * 7 ft footing is founded at a depth of 2 ft and supports a vertical load of 80 k and a moment load of 30 ft-k in the B direction and 50 ft-k in the L direction. Determine the dimen-sions of the equivalent uniformly loaded footing and compute the equivalent bearing pressure.A square footing is required to support a column of dimensions 450 X 450 mm. carrying 1000KN dead load and 750 KN live load. Given allowable bearing capacity of the soil is 210 KN/m^2, concrete compressive strength is 22.5 MPa .and steel yield is 400 MPa. Assume footing thickness is 600 mm Find footing side length
- A 3.6 m square footing is proposed to be used to support a 530 mm x 309 mm RC column loaded with 704 kN dead load and 530 kN live load. The bottom of the footing is 1.5 m below the ground. Assume soil weighs 19 kN/m3 and the allowable soil bearing pressure is 312 kPa. The thickness of the footing is 525 mm. f'.= 21 MPa and f, = 420 MPa. It is to be reinforced with 20 mm diameter. Use 24 kN/m3 as the unit weight of %3D concrete. Note: For two-way shear, use an effective depth measured from the top of the footing until the top of the bottom-most bar (d3) What is the ratio of the Demand Shear Force and the Capacity in Two Way Shear? (Vu/phiVn) Answer in 4 decimal places (1.6125, 1.5140, 0.8461, etc.)A square footing is required to support a column of dimensions 450 X 450 mm. carrying 1000KN dead load and 750 KN live load. Given allowable bearing capacity of the soil is 210 KN/m^2, concrete compressive strength is 22.5 MPa .and steel yield is 400 MPa. Assume footing thickness is 600 mm check the footing for the one way shear .A footing of size 2.5 m x 2.5 m and 500 mm thick resists characteristic axial loads of 800kN dead and 300 kN imposed from a 400 mm square column. The safe bearing pressure on the soil is 230 kN/m2 and the characteristic material strengths are fcu = 35 N/mm2, fy=460N/mm2. Density of concrete is 24 k N/m3. Cover to all reinforcement is 50 mm. Determine the design load b) Check whether the base pressure is safe c) Design the bending reinforcement, assuming 16 mm diameter bars.
- A 3.3 m square footing is proposed to be used to support a 435 mm x 435 mm RC column loaded with 585 kN dead load and 643 kN live load. The bottom of the footing is 2 m below the ground. Assume soil weighs 19 kN/m3 and the allowable soil bearing pressure is 290 kPa. The thickness of the footing is 459 mm. f'. = 21 MPa and fy = 420 MPa. It is to be reinforced with 20 mm diameter. Use 24 kN/m3 as the unit weight of concrete. Use an effective depth measured from the top of the footing until the center of the bottom-most bar (d1) Calculate the number of bars required in one direction. Answer in multiples of 1A 3.5 m square footing is proposed to be used to support a 328 mm x 328 mm RC column loaded with 815 kN dead load and 770 kN live load. The bottom of the footing is 2 m below the ground. Assume soil weighs 19 kN/m3 and the allowable soil bearing pressure is 314 kPa. The thickness of the footing is 553 mm. f'c = 21 MPa and fy = 420 MPa. It is to be reinforced with 20 mm diameter. Use 24 kN/m3 as the unit weight of concrete. Use an effective depth measured from the top of the footing until the center of the bottom-most bar (d1) Calculate the number of bars required in one direction.A footing supporting a 2 ft x 2 ft column load carring 550 kips (dead load) and 200 kips (live load). The foundation level is 5 ft below the ground surface. The gross allowable bearing capacity is 6 ksf. The unit of soil is 130 pcf. You are required to provide complete design calculations for bearing, shear, and flexure for the strip footing. Assume f' = 4 ksi, fy = 60 ksi.