Footing depth and width will depend on frost lines and local building codes.
A cubic foot is 12" thick 12" wide and 12" deep. .45 cubic feet per 60# bag of concrete
To calculate the volume of concrete needed, use the formula for volume: length × width × depth. In this case, convert the dimensions to feet: 80 feet long, 40 feet wide, and 0.5 feet deep (6 inches). Therefore, the volume is 80 × 40 × 0.5 = 1,600 cubic feet. You would need 1,600 cubic feet of concrete for the project.
3' wide, about 31'----4' wide, about 24'
Reinforced concrete floors can be designed for a wide range of loads. Different thicknesses and shapes of concrete and arrangements of reinforcing will have different strengths.
6'' thick sand filling, then 9'' thick plain cement concrete 1:4:8 [ ratio] then top layer of Plain cement concrete 1:1.5:3 mixed with concrete mixer. proper vibrator should be used. expansion joint should be after 2.5mts to 3mts alternatively of 12 mm wide and filled with the mixer of hot bitumen sand mixed. by: m.s.chaudhary [civil engineer]
To calculate the volume of concrete needed for a footer that is 12 inches wide and 3 feet deep, first convert the dimensions to feet. The width is 1 foot (12 inches) and the depth is already 3 feet. The volume is calculated using the formula: volume = width × length × depth. Assuming the length is 1 foot, the volume would be 1 ft × 1 ft × 3 ft = 3 cubic feet of concrete needed.
Depends how wide the 3 yard length is and how deep the concrete is put over that area.
131,328 in3, but you should have worked it out for yourself.
About 4 feet deep should be good.
If you mean how wide a footer you need, only as thick as the old existing footer. Residential footers are usually way over designed, so there is no reason to make it wider. If you do mean thick, a normal house footer is 8" thick. If you are actually underpinning an existing footer, the dinensions are in front of you as you excavate under it for underpinning.??? Don't make it anymore complicated than that.
128
To many!
0.246914 cu. yards (6.666667 cu. ft ) of concrete is needed.
You will need 1.36 cubic yards of cement.
1.24 cubic yards.
Depends on the length of the hole.
You'll need 3.53 cubic yards of cement.