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HW#10 Given the following column loading and footing information, determine the size of a mat foundation...
A (9’x9’x32”) square footing is supporting 230 kips dead load and 130 kips live load from 18-in square column. The allo...
A (9’x9’x32”) square footing is supporting 230 kips dead load
and 130 kips live load from 18-in square column. The allowable
bearing soil pressure is 5000 psf. There is no over-burden soil
weight. Check if the footing area satisfies the soil bearing
pressure requirements. Also, check if the thickness satisfies the
shear ( two and one way) requirements. Finally, design the flexural
steels each direction.
Open book and notes Name a (9%9x32") square footing is supporting 230 kips dead load...
Part-I: OPEN BOOK Problem 1 (30 points). For the isolated square footing shown below, assume that the combined weight of soil and concrete above the base of the footing is equal to 120 pcf. Assum...
Part-I: OPEN BOOK Problem 1 (30 points). For the isolated square footing shown below, assume that the combined weight of soil and concrete above the base of the footing is equal to 120 pcf. Assume fc-3000 psf and column size of 18in. x 18 in. Determine the followings: a) If the footing size of 10ft. x10ftx 2ft. is adequate based on allowable soil-bearing capacity qa 6,000 psf b) If the footing 10ft. x10ft.x 2ft. is adequate for shear e) Calculate...
2. Design a square spread footing for the following conditions. Service dead load is 350 kips,...
2. Design a square spread footing for the following conditions. Service dead load is 350 kips, service live load is 275 kips. Soil density is 130 lb/ftº. Allowable soil pressure is 4500 psf. Column is 18 in. square. Geotechnical analyses have determined the width to be 13 ft. fe' = 3500 psi normal weight concrete, and fy= 60 ksi. The base of the footing is placed 5 ft below the ground surface. Note: you don't need to design the bar...
1. Design a wall footing for the following conditions. Service dead load is 6 kips/ft, service...
1. Design a wall footing for the following conditions. Service dead load is 6 kips/ft, service live load is 8 kips/ft. Soil unit weight is 120 lb/ft?. Allowable soil pressure, qa is 4000 psf. The base of the footing is placed 3 ft below the ground surface. Wall is 12 in, thick. Geotechnical analyses have determined the width to be 4 ft. fe' = 3500 psi normal weight concrete, and fy = 60 ksi. Note: you don't need to design...
Geotechnical square foundation design 1. A square footing is subjected to a vertical load of 50,000...
Geotechnical square foundation design
1. A square footing is subjected to a vertical load of 50,000 lbs and a moment of 25,000 lb-ft. The depth of the foundation is 4 ft. The water table is at the base of the footing. The soil above the base of the footing has y-100 pcf and a friction angle of 30°. The soil below the base of the footing has a Ysat 120 pcf, a friction angle of 20° and c-100 psf. Find...
Design a square single column footing to support an 18 inch square interior column reinforced with...
Design a square single column footing to support an 18 inch square interior column reinforced with 8-#10 bars. The column carries an unfactored dead load of 245 Kips that includes weight of soil and weight of footing and an unfactored live load of 20 feet below finished grade. The footing is 10 feet by 10 feet and is 30 inches thick. The allowable soil pressure is 5000 psf, fe' 4000 psi and fy 60000 psi. Concrete used shall be sand...
A plain concrete footing is to be designed for a 400 mm reinforced concrete wall that...
A plain concrete footing is to be designed for a 400 mm reinforced concrete wall that supports a dead load of 187 KN/m including the wall weight and a live load of 79 KN/m. The base of the footing is to be 1.4 m below the final grade. The allowable bearing capacity is 189 Kpa, weight of soil is 15.82 KN/m3, fc’ is 28 Mpa, and concrete to be 23.5 KN/m3. Determine the: width of the plain concrete footing (c)...
15.3. psi. Design a single-column footing (including dowels) to support an 11 in. square column reinforced...
15.3. psi. Design a single-column footing (including dowels) to support an 11 in. square column reinforced with eight No. 9 (No. 29) bars centered 2.5 in. from the column faces (equal number of bars on each face). The unfactored axial dead load = 135 kips, and the unfactored axial live load=125 kips. For the column, f=4000 psi and f=60,000 psi. The base of the footing will be 3 ft below grade. The allowable soil bearing pressure is 3000 lb/ft2. Material...
A mat foundation with dimensions of 50' x100' is supporting a total load of 2,875 kips....
A mat foundation with dimensions of 50' x100' is supporting a
total load of 2,875 kips. Dry unit weight of soil is 100 lb/ft^
with a moisture content of 15%. what should be the depth of the mat
foundation to avoid any increase in the net pressure due to the new
construction.
(7.5 points) A mat foundation with dimensions of 50 ft x 100 ft is supporting a total load of 2,875 kips. Dry unit weight of soil is 100...
The plan of a mat foundation with column loads is shown in Figure 1. The size...
The plan of a mat foundation with column loads is shown in
Figure 1. The size of the mat is 76 ft
× 96 ft, all columns are 24 in.× 24 in. in section, and qall (net )
= 1.8 kip/ft2.
i. Calculate the soil pressures at points A, B, C, D, E, F, G, H,
I, J, K, L, M and N, and
verify that the soil pressures are less than the net allowable
bearing capacity.
ii. Divide...
A (9’x9’x32”) square footing is supporting 230 kips dead load
and 130 kips live load from 18-in square column. The allowable
bearing soil pressure is 5000 psf. There is no over-burden soil
weight. Check if the footing area satisfies the soil bearing
pressure requirements. Also, check if the thickness satisfies the
shear ( two and one way) requirements. Finally, design the flexural
steels each direction.
Open book and notes Name a (9%9x32") square footing is supporting 230 kips dead load...
Part-I: OPEN BOOK Problem 1 (30 points). For the isolated square footing shown below, assume that the combined weight of soil and concrete above the base of the footing is equal to 120 pcf. Assume fc-3000 psf and column size of 18in. x 18 in. Determine the followings: a) If the footing size of 10ft. x10ftx 2ft. is adequate based on allowable soil-bearing capacity qa 6,000 psf b) If the footing 10ft. x10ft.x 2ft. is adequate for shear e) Calculate...
2. Design a square spread footing for the following conditions. Service dead load is 350 kips, service live load is 275 kips. Soil density is 130 lb/ftº. Allowable soil pressure is 4500 psf. Column is 18 in. square. Geotechnical analyses have determined the width to be 13 ft. fe' = 3500 psi normal weight concrete, and fy= 60 ksi. The base of the footing is placed 5 ft below the ground surface. Note: you don't need to design the bar...
1. Design a wall footing for the following conditions. Service dead load is 6 kips/ft, service live load is 8 kips/ft. Soil unit weight is 120 lb/ft?. Allowable soil pressure, qa is 4000 psf. The base of the footing is placed 3 ft below the ground surface. Wall is 12 in, thick. Geotechnical analyses have determined the width to be 4 ft. fe' = 3500 psi normal weight concrete, and fy = 60 ksi. Note: you don't need to design...
Geotechnical square foundation design
1. A square footing is subjected to a vertical load of 50,000 lbs and a moment of 25,000 lb-ft. The depth of the foundation is 4 ft. The water table is at the base of the footing. The soil above the base of the footing has y-100 pcf and a friction angle of 30°. The soil below the base of the footing has a Ysat 120 pcf, a friction angle of 20° and c-100 psf. Find...
Design a square single column footing to support an 18 inch square interior column reinforced with 8-#10 bars. The column carries an unfactored dead load of 245 Kips that includes weight of soil and weight of footing and an unfactored live load of 20 feet below finished grade. The footing is 10 feet by 10 feet and is 30 inches thick. The allowable soil pressure is 5000 psf, fe' 4000 psi and fy 60000 psi. Concrete used shall be sand...
15.3. psi. Design a single-column footing (including dowels) to support an 11 in. square column reinforced with eight No. 9 (No. 29) bars centered 2.5 in. from the column faces (equal number of bars on each face). The unfactored axial dead load = 135 kips, and the unfactored axial live load=125 kips. For the column, f=4000 psi and f=60,000 psi. The base of the footing will be 3 ft below grade. The allowable soil bearing pressure is 3000 lb/ft2. Material...
A mat foundation with dimensions of 50' x100' is supporting a
total load of 2,875 kips. Dry unit weight of soil is 100 lb/ft^
with a moisture content of 15%. what should be the depth of the mat
foundation to avoid any increase in the net pressure due to the new
construction.
(7.5 points) A mat foundation with dimensions of 50 ft x 100 ft is supporting a total load of 2,875 kips. Dry unit weight of soil is 100...
The plan of a mat foundation with column loads is shown in
Figure 1. The size of the mat is 76 ft
× 96 ft, all columns are 24 in.× 24 in. in section, and qall (net )
= 1.8 kip/ft2.
i. Calculate the soil pressures at points A, B, C, D, E, F, G, H,
I, J, K, L, M and N, and
verify that the soil pressures are less than the net allowable
bearing capacity.
ii. Divide...
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