A square footing has a dimension of 1.30m. Its bottom is 1.5m below the ground surface. The groundwater table is expected to exist during the life of the structure. The unit weight of soil above the water table is 17.20 kN/m³ and that below the water table is 19.60 kN/m3 (saturated). Angle of internal friction is 20 degrees and cohesion is 15 kPa. Using general shear failure and a factor of safety of 3.0. Calculate the following a. Gross allowable bearing capacity if the water table is 4m from the ground surface b. Gross allowable bearing capacity if the water table is 2m from the ground surface c. Gross allowable bearing capacity if the water table is at the embedment of the foundation d. Gross allowable bearing capacity if the water table is 1.0m from the ground surface

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: Two footings rest in a layer of sand 2.7 m thick. The bottoms of the footings are 0.90 m below the…

A: ANSWER:- 64.6 Which is approximately equal to 69.2 mm So , option (A) IS correct answer…

Q: A circular footing with a radius of r = 4.0 ft will be embedded D = 2 ft in uniform clay. The top of…

A: Given, Footing radius, r = 4 ft  Footing depth, D = 2 ft

Q: Two meters below the ground surface, a 2x2 m square footing is constructed on NC clayey sand. The…

A: Given data: Size of square footing = 2m * 2m Average Cone resistance = 20 MPa Layer of Hard rock is…

Q: Two flexible square footings with B = 1 m, are embedded at 1 m depth. The first footing is embedded…

A: Step 1:Width of the foot is 1mDepth is 1mDepth of each soil layer is 5mModulus of elasticity of sand…

Q: A footing 2.25 x 2.25m is located at a depth of 1.5 m in a sand, the shear streng parameters to be…

A: Given : Footing size = 2.25 X 2.25 m Depth = 1.5 m To Find : Ultimate bearing capacity : A) if the…

Q: A square footing of 2 m side is subjected to a vertical load of 2000 kN. Assuming load dispersion as…

A:

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: Q4: Use the rectangular loaded area to calculate the increase in vertical stresses at points (A) and…

A: Note: Hi! Thank you for the question As per the honour code, We’ll answer the first question since…

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: Two parallel strip footings 3m wide and 5m apart(measured from centre to centre), which transmit a…

A: For strip footing generally load distribution is taken as 1 V: 0.5 H increment  of total vertical…

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.