The design column loads for a certain building range from 20 to 100 kN. The site for thisstructure is underlain by a silty sand with g = 18.2 kN/m3 , c′ = 2 kPA and f′ = 34°. The water table is at a great depth and footings are to be founded at a depth of 1.3 m.Determine the required footing width and allowable bearing pressure for the most lightlyloaded footing and the most heavily loaded footing using ASD with a factor of safetyof 2.5.

Q: A 3m diameter circular footing is transmitting a concentrated load of 1500KN. A). Determine the…

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Q: Kindly answer this as soon as possible. Urgent Find ultimate bearing capacity qu for a footing of…

A: Given,  Cu= 100kpa Unit weigh of soil = 20KN/m³ Width of footing (B) =1m Depth of foundation (D) =…

Q: A 3.5 m square footing is proposed to be used to support a 328 mm x 328 mm RC column loaded with 815…

A: We have to calculate the number of bars required in one direction of the given sqaure footing…

Q: b) A square footing 3.5 m X 3.5 m is built on a homogeneous bed of sand of density 16 kN/m having an…

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Q: 7.16 A 650-kN column load is supported on a 1.5-m wide by 2.0-m long by 0.5 m deep spread footing.…

A: W.f=1.520.523.6=35g=650+351.5×2=228 kpaσzo'=17×0.5=8σzp'=gauge=1.25×17=21 kpaσzp' constant=2×17=34…

Q: A rectangular footing 2.0 m by 3.0 m is built in a homogeneous bed of sand of having bulk unit…

A: (a) Assume the last digit of student number as 6. For given angle of shearing resistance, we get

Q: A 16 in square concrete column carries vertical unfactored load of 250 k. The vertical serviceload…

A: Solution: Determine the weight of the footing Wf=γLBDHere,Wf= weight of footingγ=unit weight of…

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 2.0 m x 2.0 m square pad footing will be placed in a normally consolidated clay soil to carry a…

A: Given data  Unit weight  Effective Cohesion Angle of internal friction in total stress and effective…

Q: Three parallel strip footings 3 m wide each and 5 m apart center to center transmit contact…

A: Given data: Three parallel strip footings 3 m wide each =b  5 m apart center to center transmit…

Q: A 1.4-m wide, 2.5-m long, 0.5-m deep spread footing is underlain by a soil with c' = 10.0 kPa, o' =…

A: 1) For Strap footing best suited method is  Terzaghis method.

Q: i) A strip footing of width B=1m is embedded 0.6m in soil. The soil has unit weight equal to 19kN/m3…

A: Here, two questions are asked and not mentioned which one to answer. As per the Bartleby policy,…

Q: O Two circular footings of diameters D, and D, are resting on the surface of the same purely…

A:

Q: 4- sbe ultimate load on column lies on single footing of 300x400cm having uniform service stress of…

A: Load= stress×Area= 200×0.3×0.4=2400KN. The answer is d.2400KN

Q: d) Compute the allowable bearing capacity using the Terzaghi's equation for the square footing (B-…

A: Bearing capacity tend to decrease as ground water table rises towards the ground level. When ground…

Q: Problem No. 2 A circular footing with 1.50m diameter is to be constructed 1.22m below the ground…

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Q: Q3. A square 2.5-by-2.5m footing, is designed to be embedded 2m deep into a silty sand layer, with…

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Q: A building column carries a factored ultimate vertical downward load of 320 k. It is to be…

A: Square footing: Provided to support the load on a single column and load-bearing wall. It is similar…

Q: 5- A 1.5x1.5 m square footing is constructed in a cohesive soil at depth 1.2 m the ultimate bearing…

A: Square footing 1.5×1.5m Ultimate bearing capacity = 728 KN/m2Depth of foundation = 1.2 me = 0.18 m

Q: A 5ft x 5ft square footing with Terzaghi's bearing capacity parameters Nc=5, Nq=1.5, Nr=0.…

A: The formula for ultimate bearing capacity of square footing is given by, qult=1.3CNc+γDfNq+0.4γBNγ…

Q: A strip footing is to be placed 2m below the surface or soil having a cohesion of 40 KPa, unit…

A: Given:- The depth of the footing to be placed = 2 m The cohesion of the soil = 40 kPa The unit…

Q: (5) There is a strip footing with a width of 2 m and a buried depth of 1.5 m. The foundation soil is…

A: The Ultimate Bearing capacity is calculated by Terzaghi theory.

Q: Design a square footing using 25 mm main bars and 75 mm clear cover assuming an allowable soil…

A: Solution

Q: A 1 m square footing is founded at a depth of 1.80 cm on sand (foundation base thickness is 80 cm)…

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Q: A square column footing is to support a 500 mm square tied column that carries a dead load 1000 KN…

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Q: A 4.0 m square footing is proposed to be used to support a 766 mm x 766 mm RC column loaded with 550…

A: In sloped and stepped footing, the effective cross section in compression shall be limited by the…

Q: A square footing 4m * 4 m is founded at a depth of 7 m below the ground surface in a soil having 39…

A: Given: The size of the square footing is 4 m x 4 m. The depth of the footing is 7 m. The cohesion is…

Q: A 3.3 m square footing is proposed to be used to support a 435 mm x 435 mm RC column loaded with 585…

A:

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.