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UNIFORM AND POINT LOAD ON CONTINUOUS FOOTING
<br />Footing Width (FW) =
<br />Footing Depth (FD) =
<br />Soil Bearing (SB) =
<br />Max. Soil Bearing =
<br />Plain Concrete Design :
<br />F'c=
<br />Tension Fb =
<br />Procedures:
<br />12 in
<br />12 in
<br />1,500 psf
<br />1,500 psf
<br />2,500 psi
<br />80 psi
<br />Fsoil = ((D-FD)/12*1D)+SB
<br />F'soil = Fsoii-(D/12*(150-110))
<br />w = W*F'soil/12
<br />w (")
<br />12 X
<br />12 X
<br />15 X
<br />18 X
<br />21 X
<br />24 X
<br />12 X
<br />15 X
<br />18 X
<br />21 X
<br />24 X
<br />12 X
<br />15 X
<br />18 X
<br />21 X
<br />24 X
<br />12 X
<br />15 X
<br />18 X
<br />21 X
<br />24 X
<br />12 X
<br />15 X
<br />18 X
<br />21 X
<br />24 X
<br />30 X
<br />M = Fb*W*d"2/12"/6
<br />L = (2*M/w)"1/2
<br />Pmax = 2*L*w
<br />D (") Fsoil (psf) F'soil (psf)
<br />5 1,500 1 ,483
<br />12 1,500 1,460
<br />12 1,500 1,460
<br />12 1,500 1,460
<br />12 1,500 1,460
<br />12 1,500 1,460
<br />15 1,500 1,450
<br />15 1,500 1,450
<br />15 1,500 1,450
<br />15 1,500 1,450
<br />15 1,500 1,450
<br />18 1,500 1,440
<br />18 1,500 1,440
<br />18 1,500 1,440
<br />18 1,500 1,440
<br />18 1,500 1,440
<br />21 1,500 1,430
<br />21 1,500 1,430
<br />21 1,500 1,430
<br />21 1,500 1,430
<br />21 1,500 1,430
<br />24 1,500 1,420
<br />24 1,500 1,420
<br />24 1,500 1,420
<br />24 1,500 1,420
<br />24 1,500 1,420
<br />24 1,500 1,420
<br />Soil Density =
<br />Concrete Density =
<br />Inc. Width (IW) =
<br />Inc. Depth (ID) =
<br />w {#/ft} M ('#)
<br />1,483 333
<br />1,460 1,920
<br />1,825 2,400
<br />2 ,1 90 2,880
<br />2 ,555 3,360
<br />2 ,920 3,840
<br />1,450 3,000
<br />1,813 3,750
<br />2 ,175 4 ,500
<br />2,538 5,250
<br />2,900 6,000
<br />1,440 4,320
<br />1 ,800 5,400
<br />2 ,160 6 ,480
<br />2,520 7,560
<br />2 ,880 8,640
<br />1,430 5,880
<br />1,788 7,350
<br />2,145 8,820
<br />2,503 10,290
<br />2,860 11,760
<br />1,420 7,680
<br />1,775 9,600
<br />2,130 11,520
<br />2,485 13,440
<br />2,840 15,360
<br />3,550 19,200
<br />110 pcf
<br />150 pet
<br />0 psf
<br />0 psf
<br />L (ft) Pmax {#}
<br />0 .67 1,989
<br />1.62 4,736
<br />1.62 5,919
<br />1.62 7,103
<br />1.62 8 ,287
<br />1.62 9,471
<br />2.03 5 ,899
<br />2 .03 7 ,374
<br />2.03 8 ,849
<br />2.03 10,324
<br />2.03 11,798
<br />2.45 7,055
<br />2.45 8 ,818
<br />2.45 10,582
<br />2.45 12,345
<br />2.45 14,109
<br />2.87 8,202
<br />2.87 10,252
<br />2.87 12,302
<br />2.87 14,353
<br />2.87 16,403
<br />3.29 9,340
<br />3.29 11,676
<br />3 .29 14,011
<br />3.29 16,346
<br />3.29 18,681
<br />3.29 23,351
<br />Note: For point loads on footings with uniform loads, take the difference
<br />between "w" above and the uniform load, then multiply by two and by
<br />"L" above for P'max .
<br />510 S Arapaho Dr #2
<br />1011182015/9/2024
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