Find the plan dimensions of the footing.
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- Redo Problem 16.13 with the following data: gross allowable load = 184,000 lb, = 121 lb/ft3, c = 0, =26, Df = 6.5 ft., and required factor of safety = 2.5. 16.13 A square footing (B B) must carry a gross allowable load of 1160 kN. The base of the footing is to be located at a depth of 2 m below the ground surface. If the required factor of safety is 4.5, determine the size of the footing. Use Terzaghis bearing capacity factors and assume general shear failure of soil. Given: = 17 kN/m3, c = 48 kN/m2, =31.Using EC7A 1.5 m square footing is founded at a depth of 1m (equal to the foundation thickness)in fine-grained soil with the following properties:?dry= 20 kN/m3 ; ?sat = 22 kN/m3 ; ?u,k = 70 kPa; ?k ′ = 10 kPa; ? k ′ = 30°The load on the footing is vertical but has a maximum eccentricity (?) of 250 mm fromone axis (Hint: B - = B − 2e). If the water table is at the foundation level, determine thedesign bearing resistance of the footing fora. short-term conditionb. long-term conditionA rectangular footing has dimensions shown and is acted upon by a dead load of 584 kN and a live load of 412 kN. The column dimension is 399x719 mm where the shorter dimension is parallel to B. The thickness of the footing is 696mm. fc=28 MPa and fy=420 MPa for diameter 20mm bars. A=2.8m and B=5.7m Calculate the number of bars along the long direction
- A circular footing having a diameter of 1.1 m. has its bottom at a depth of 2.9 m. from the ground surface. The water table is located at a depth of 1.4 m. below the ground. The soil has the following properties: γd = 18.07 kN/m3, γsat = 19.45 kN/m3, c = 15.19 kPa, Nc = 35.04, Nq = 22.05, Nγ = 19.04. Determine the allowable load, in kN, that the footing can carry using factor of safety of 2.5. Round off to two decimal places.A circular footing is 2.5 m in diameter. The bottom of the footing is 2.73m. below the ground surface. Moist unit weight of soil is 18.2kn/m3, saturated unit weight is 19.35kn/m3. Cohesion of soil s 88kpa. Use Nc=25.81, Nq=12.29, Ny=8.6. If the ground water table is located at a depth of 1.09m from the ground syrface, determine the allowable load (Kn) that the footing can carry. FS=2Problem No. 3Considering general shear failure , compute the gross allowable load of a rectangular footing 6mlong by 1.25m wide using a load factor (FS) of 2.50. The depth of the bottom is 4.50 m below theground surface. Cohesion of soil is 30 kPa, unit weight of soil is 19.20 kN/m3 and angle of friction is10°.
- Situation 1: A footing supports a 250 mm thick wall:Given:Allowable soil bearing pressure = 192 kPaThickness of footing = 350 mmConcrete, f′c = 27.5 MPaSteel, fy = 415 MPa1) The footing is subjected to a moment of 126 kN-m and a total vertical load of 280 kN. Find the minimum width ofthe footing to prevent uplift.2) Given:Resisting moment, Mr = 440 kN − mOverturning moment, Mo = 260 kN − mTotal vertical load = 265 kNDetermine the minimum width of the following to prevent uplift.3) Given:Footing width = 3 mResisting moment, Mr = 500 kN − mOverturning moment, Mo = 265 kN − mTotal vertical load = 335 kNDetermine the maximum soil bearing pressure?a) A square footing placed at a depth of 1 m is required to carry a load of 1000 kN. Find the required size of footing given the following data. C = 10 kPa, ϕ = 38o, γ = 19 kN/m3, Nc = 61.35, Nq = 48.93, Nγ= 74.03 and F = 3.Assume water table is at the base of footing.A rectangular footing has dimensions shown and is acted upon by a dead load of 382 kN and a live load of 536 kN. The column dimension is 307x560 mm where the shorter dimension is parallel to B. The thickness of the footing is 656mm. fc=28 MPa and fy=420 MPa for diameter 20mm bars. A=2.6m and B=5.2m
- UPVOTE will be given! STRENGTH OF MATERIALS A rectangular footing has a dimensions shown and is acted upon by a dead load of 1,929 kN and a live load of 1,515 kN. The column dimension is 317 x 667 mm where he shorter dimension is parallel to B The thickness of the footing is 566mm. f'c=28 MPa and fy=420 MPa for diameter 20mm bars. A=2.7m and B=4m Calculate the number of bars along the long direction?A rectangular footing is designed to carry an allowable load of 580kN with its weight inclusive. The bottom of the footing is 1m below the ground surface and the water table coincides with the bottom of the footing. Assume general shear failure. Given, γ=18kN/m^3, c = 25kPa, γ_sat=21.5kN/m^3. Use Nc = 35, Nq = 22, Ny = 19. Determine the width B of the footing using FS = 3.0 if B/L = 0.5A certain column carries a vertical downward load of 1,200 kN. It is to be supported on a 1 mdeep, square footing. The soil beneath this footing has the following properties: g = 20.5 kN/m3, c′ = 5 kPa, and f′ = 36o . The groundwater table is at a depth of 1.5 m below the ground sur-face. Using ASD, compute the footing width required for a factor of safety of 3.5.