22 x 44 (BxL) mat foundation causes a bearing pressure of 220 kPa. The footing is to be constructed 4 m below the surface. The dry and saturated unit weights of the soil are 17 kN/m3 and 18 kN/m3, respectively. The soil has c'=22 kPa and angle of friction=22°. The groundwater table is observed at the depth of 15 m. Determine the factor of safety by using Vesic's method to calculate ultimate bearing capacity

Q: 1) A footing whose one side spans 4.2m carries a 520 kN dead load and 640kN live load from a…

A: Answer  (1) Calculation of Dimension of the footing We know that Area of footing is given by A = Pqe…

Q: A 1mx1m square concrete footing carrying a vertical load of 500KN founded on fully saturated clay.…

A:

Q: Suppose that you are to design a foundation with a depth of 1m. It was also observed that the…

A: Solution: Given: Gross weight = 5 kN D = 1 m G.W = 0.4 m F.O.S = 2.5

Q: For a rectangular footing 4 ft x 8 ft, 100 kips of load is being applied. Compute stress increase 10…

A: Rectangular footing size = 4 ft x 8 ft Load applied= 100 Kips We have to find out the stress…

Q: A column is supported on a footing as shown in the figure below. The water table is at a depth of 10…

A: Given- Water table at a depth of 10 m, Size of footing- 1.5 m × 3 m, Depth of footing Df=1 m, Unit…

Q: Q#3:…

A: The allowable safe bearing capacity is given by: Where,

Q: 5b) (P) = 75 k (shown below). The footing is 3 ft thick and flush with the ground surface. Assume x=…

A: Solution:- The given diagram is shown below,

Q: The average correcte N60 = 7 in the effective zone for a square footing (1m x 1m) located at a depth…

A: If the soil support of the continuous foundation yields due to the load imposed by the foundation,…

Q: A strip footing 1.5 m wide is located at a depth of 0.75 m (equal to the foundation thickness) in a…

A: Width od strip footing = 1.5m , Depth = 0.75m = Thickness of foundation , Unit weight of sand =…

Q: A 24x 48 (BxL) mat foundation causes a bearing pressure of 240 kPa. The footing is to be constructed…

A: B = 24 m L =48 m bearing pressure  = 240 kPa Footing is 4 m below the surface Dry unit weight = 17…

Q: A combined footing is proposed to support two columns, C1 and C2, with loads equal to 2000 kN and…

A: (i) Soil Bearing Capacity:The bearing capacity of the soil can be calculated using the following…

Q: Question Attached

A: Given:- To find:- Ultimate and Allowable bearing capacities

Q: A rectangular footing of B=3 and L=6 rests at the depth of 2 m below the ground level. The stress…

A: Based in the given data, we can use the stress increase due point load equation of Boussinesq's.…

Q: Consider the strip footing shown in the figure below.  The soil consists of sand with f’ =36° and…

A: The angle of friction = 36° The effective cohesion (c') = 0 The saturated unit weight of the clay =…

Q: A 3.44m x 4.49m footing has a 370 mm column at center with the loads P = 597 kN and My=102.7 kN-m…

A:

Q: Consider the strip footing shown in the figure below.  The soil is a clay-dominant material with…

A: Depth of foundation= 1 m  Width of foundation= 2 m  Water table is at ground level.

Q: A continuous footing is to be designed to carry a wall load of 7 kips/ft. The soil shear strength…

A: The given data is: Su=700 psf Wall load, Qa=7 kips/ft Df=2.5 ft FS=2.5 γ=110 lb/ft3

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.