Foundation Design: Principles and Practices (3rd Edition)
3rd Edition
ISBN: 9780133411898
Author: Donald P. Coduto, William A. Kitch, Man-chu Ronald Yeung
Publisher: PEARSON
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Chapter 6, Problem 6.4QPP
A 400 kN vertical downward column load acts at the centroid of a 1.5 m square footing. The bottom of this footing is 0.4 m below the ground surface and the top is flush with the ground surface. The groundwater table is at a depth of 3 m below the ground surface. Compute the bearing pressure.
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2
A 400 kN vertical downward column load acts at the centroid of a 1.5 m square footing. Thebottom of this footing is 0.4 m below the ground surface and the top is flush with the groundsurface. The groundwater table is at a depth of 3 m below the ground surface. Compute thebearing pressure.
Chapter 6 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 6 - What is the difference between a square footing...Ch. 6 - Prob. 6.2QPPCh. 6 - Prob. 6.3QPPCh. 6 - A 400 kN vertical downward column load acts at the...Ch. 6 - A bearing wall carries a dead load of 5.0 k/ft and...Ch. 6 - Prob. 6.6QPPCh. 6 - A 5 ft square, 2 ft deep spread footing is...Ch. 6 - Consider the footing and loads in Problem 6.7,...Ch. 6 - The two columns in Figure 6.19 are to be supported...Ch. 6 - Prob. 6.10QPP
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- 3. Calculate the total load on a 4'x4'x1' spread footing that is buried 3' below, and a hot tub is located directly above the spread footing and the footing column is l'x1'. Assume the hot tub is full and no one is in the tub. Use some or all of the following data to calculate the total compressive load on the soil directly underneath the footing: a. DL - 12,000 lbs and b. LL-8,000 lbs c. 400 gallon hot tub (empty hot tub weighs 200 lbs) d. Soil weight 120 PCF e. Concrete weight 150 PCFarrow_forwardDescribe the Stress conditions for lower bound solution of footing bearing capacity.arrow_forward1) Design a rectangular footing for an 16” square corner Column with PDL = 280 kips and PLL = 180 Kips. Make the length of the long side about 1.5 the width of the short side. Fy = 60 ksi F’o= 4000 psi for both, column and footing. Assume the base of the footing is 4'-6" below grade and the depth of the footing is 26". The soil weight is 100 PCF. (Normal weight concrete, No epoxy coating, The Column is reinforced with eight #8 bars.) Need to design for load transfer from the Column to the foating. Need to Show the development length for the dowels. Need to design the bars for footing at both directions. Need to check if the bars fit the footing based on the development legth. Need to show two-way footing Spacing diagram.arrow_forward
- A 10 foot diameter circular footing is to be constructed and will have a net bearing pressure of 2,000 psf. Determine the increase in vertical stress at a depth of 20 feet below the center of the footing the edge of the footingarrow_forwardDefine the Vertical Stress Due to a Uniformly Loaded Rectangular Footing ?arrow_forwardA 5 ft square, 2 ft deep spread footing is subjected to a concentric vertical load of 60 k and anoverturning moment of 30 ft-k. The overturning moment acts parallel to one of the sides of thefooting, and the top of the footing is flush with the ground surface and the groundwater tableis at a depth of 20 ft below the ground surface. Determine whether the resultant force actswithin the middle third of the footing, compute the minimum and maximum bearing pressuresand show the distribution of bearing pressure in a sketch. Determine the size of the equivalentuniformly loaded footing and compute the equivalent bearing pressure.arrow_forward
- QUESTION 2 a. A column 425 mm x 425 mm carries a characteristic axial load of 800 kN dead and 300KN imposed. A footing size of 2800mm x 2800mm and thickness of 500mm has been proposed, The allowable bearing pressure of the soil is 200KN/m2. You are required to: (i) check the suitability of the size and design the base against bending, punching shear (ii) Show in a sketch the reinforcement details provided.arrow_forwardA3 mx 3 m square spread footing is to support a 350 mm x 350 mm column carrying a dead load of 750 kN and live load of 500 kN. For concrete f'c is 21 MPa and for steel, fy is 415 MPa. Use NSCP 2001 provisions. Determine the effective depth considering punching shear. A 300 mm 350 mm 400 mm 450 mm B.arrow_forwardThe thickness and reinforcement of a spread footing are governed by structuralconcerns. Structural design is governed by the LRFD method, which means theseanalyses are based on the factored loads.arrow_forward
- A square footing is required to support a column of dimensions 450 X 450 mm. carrying 1000KN dead load and 750 KN live load. Given allowable bearing capacity of the soil is 210 KN/m^2, concrete compressive strength is 22.5 MPa .and steel yield is 400 MPa. Assume footing thickness is 600 mm Find footing side lengtharrow_forwardA square footing is required to support a column of dimensions 450 X 450 mm. carrying 1000KN dead load and 750 KN live load. Given allowable bearing capacity of the soil is 210 KN/m^2, concrete compressive strength is 22.5 MPa .and steel yield is 400 MPa. Assume footing thickness is 600 mm check the footing for the one way shear .arrow_forwardDesign a square pad footing with an overall depth of 600mm, cover to the reinforcements 50mm with 20mm diameter reinforcement bars in both directions. The footing carries a 400mm square column with a dead load of 1050KN and imposed load of 300KN. The safe bearing capacity of the soil is 170KN/m^2, fcu 30N/mm^2. Assume a unit weight of concrete to be 24KN/m^3 and footing weight 150KNarrow_forward
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