A building column carries a factored ultimate vertical downward load of 320 k. It is to be sup-ported on a 3ft deep, square footing. The soil beneath this footing has the following properties: g = 20.5 kN/m3, c′ = 5 kPa, and f′ = 36°. The groundwater table is at a depth of 5 ft below the ground surface. Using LRFD, with a resistance factor of 0.5, compute the required footin

Q: Q1. Determine the net bearing pressure for a 3m x 3m footing at a depth of 2 m in a medium dense…

A: Data given:Size of footing =3m×3mdepth of footing =2mpermissible settlement =25mmfinal corrected SPT…

Q: A rectangular footing, with a plan area of 1-4mx2·0m is to be placed 2m below the ground surface.…

A: Given Information:

Q: Working example 10.2: Design a strip footing A 300 mm thick concrete wall carries a service dead…

A: Given Data :Thickness = 300 mmDead load = 140 kN/mLive Load = 225 KN/mSoil pressure = 240 KPafc= 20…

Q: Define the Contact Pressure in Spread Footings with Eccentric Loading

A: Introduction: Contact pressure is a topic of discussion in the field of foundation engineering.…

Q: (c) Serviceability limit state is the critical criterion for the design of a square footing on the…

A: Given:- Sand:-

Q: A continuous concrete footing (yc = 24 kN/m³) of breadth 2.0 m and thickness 0.5 m is to be founded…

A: The given data is: γc=24 KN/m3  Cu=22 KPa γ=19 KN/m3 Vertical load, V=85 KN/m Factor of safety,…

Q: A square footing has a dimension of 1.42 m x 1.42 m and has its bottom 1.39 m below the ground…

A: Given Dimension: 1.42 X 1.42 df = 1.39m

Q: N. N, N. N. Ni, 5.70 1.00 0.00 26 15.53 6.05 2.59 1.07 0.005 16.30 2.88 5.90 6.10 27 28 6.54 1.14…

A:

Q: A 350 mm by 400 mm rectangular tied interior column supports a dead load of 680 kN and a live load…

A:

Q: Classify roads based on all functional parameters ( speed , trip length , ..etc)

A: The base of a transportation system is the giant network of Roads as it carries variety of vehicles…

Q: a square footing is to be constructed on a uniform thick deposit of clay with a unconfined…

A:

Q: A plate-load test was conducted in a sand soil. The size of the bearing plate was 0.475m x 0.475m.…

A:

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: 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 long footing is to be constructed in the slope of a clay hillside that makes an inclination of 30°…

A: Given: The cohesion of clay is 1500 psf. The unit weight is 105 pcf. The D/B ratio is 0. The wall…

Q: A soil profile is provided below. The estimated stresses from a spread footing overlying a 9 meter…

A: Height of clay layer (h) = 9 mCc' = 0.22Cs' = 0.04Pre-consolidation pressure (σp) = 215 kPaEstimated…

Q: An interior column for a manufacturing building will be supported on the site’s natural clay soil,…

A: The ultimate bearing capacity for square footing is given by,

Q: 2. A square footing has a dimension of 1.8 m x 1.8 m x 0.8 m. The column section is 320 mm square.…

A: The development length can be calculated using the following formula:Here,  and  are the…

Q: id no. 20193022142

A: Given: Df = 1.2+0.01(42) = 1.62m Water table location = 0.5+0.01(42) = 0.92 m (from the top of the…

Q: An 800 kN column load will be supported on a square spread footing foundation bearing on the surface…

A: Given: The load on the column is 800 kN. The factor of safety is 3. The angle of internal friction…

Q: The average corrected in the effective zone for a square footing(1m x 1m) located at a depth of 2m.…

A: Let us analyse the question in step 2.

Q: A 2.6m wide wall footing subject to local shear is embedded 1.8m beneath the ground surface. The…

A: The net allowable bearing capacity (qna) of the soil is the maximum net pressure that can be allowed…

Q: Determine the wall loading that can be carried by a long footing 1.2 m wide and located 1.5 m below…

A: Solution:- Given data,Long footing (B)=1.2mDf=1.5mSoil cohesion( C)=62kN/m3Angle of internal…

Q: A 2.6m wide wall footing subject to local shear is embedded 1.8m beneath the ground surface. The…

A: The net allowable load acting on the soil is the maximum net load that can be allowed safely so that…

Q: A certain column carries a vertical downward load of 448.0 k. It is to be supported on a 3.0-ft deep…

A:

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: A circular water tank with a diameter of 30m is to be constructed on a thick layer of silt. The…

A: Given:- FOS=3 unit weight = 18kN/m3 undrained cohesion=24kPa d=30m To find:- maximum height of water…

Q: 1. List the 3 types of bearing capacity failure and explain differences between them ~ 10 min

A: NOTE : As per guidelines, first question is solved. Request you to post remaining question…

Q: A (4m x 5m) rectangular footing was supported by a saturated clay layer with a thickness of 5m. If…

A: As the clay layer has sandy layer beneath, double drainage would occur and consolidation settlement…

Q: A proposed office building will include a 10 ft x10 ft square, 3 ft deep (the footing height is also…

A: Given, Cross sectional area of footing = 10 ft x 10 ft  Depth of footing = 3 ft  Angle of internal…

Q: A rectangular footing 13'x14' supports a rectangular column 12" x 24", with DL = 340 kips and LL =…

A: To determine the total soil pressure and check if the footing size is appropriate.   Given, Size of…

Q: A 4-foot square footing has its bottom 2.24 ft. below the ground surface. The ground water table is…

A: Since the given footing is a square footing so, Using Terzaghi's equation for square footing;…

Q: Determine the maximum allowable service axial load (dead+live) that the isolated spread footing…

A: Given Data:Footing dimension= 1.50m sq.Footing thickness= 0.75mColumn size and orientation : 250mm…

Q: 1. A rectangular footing 2.0 m by 3.0 m is built in a homogeneous bed of sand of having bulk unit…

A: (a) For given angle of shearing resistance, we get

Q: A 481 mm square pedestal is to be supported by a 2.08m by 5.75m footing. It is to carry an axial…

A: Answer We are given  square pedestal = 481 mm Footing 2.08 m x 5.75 m Axial dead Load = 563 KN Axial…

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 proposed office building will include a 10 ft x10 ft square, 3 ft deep (the footing height is also…

A: To calculate the maximum bending moment from an earthquake that this foundation can support, you…

Q: Determine the wall loading that can be car- ried by a long footing 1 m wide and located 1.5 m below…

A: The cohesion of the soil is c=58 kN/m The angle of internal friction is 20° The total unit weight of…

Q: A proposed industrial building will carry unfactored column loads ranging from 280 to 1,200kN and…

A: given

Q: A building will have a factored column load of 300 kN. The column is to be supported on a square…

A:

Q: A certain column carries a vertical downward load of 1350 KN. It is to be supported on a 1.0 m deep,…

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.