Soil Bearing Capacity Calculator
Inputs
psf
Soft clay: 200–500 psf; stiff clay: 1,000–2,000 psf; hard clay: 2,000–4,000 psf
°
ASTM D3080: loose sand 28–32°; dense sand 36–40°; gravel 40–45°; clay 0–15°
ft
ft
pcf
Tab to move between fields
Results
Ultimate Bearing Capacity
18,029 psf
Allowable Bearing (FS=3)
6,010 psf
Net Allowable Bearing5,890 psf
Bearing Factor Nc30.14
Bearing Factor Nq18.4
Bearing Factor Nγ22.4
1
Identify Input Parameters
4 parameters
= Soil Cohesion (c) = 200psf, Friction Angle (φ) = 30°, Foundation Width (B) = 4ft, Foundation Depth (D) = 3ft, Soil Unit Weight (γ) = 120pcf
= 5 input(s) provided
2
Calculate Ultimate Bearing Capacity
Ultimate Bearing Capacity
= 18029
= 18029
3
Calculate Allowable Bearing
Allowable Bearing
= 6010
= 6010
4
Calculate Net Allowable Bearing
Net Allowable Bearing
= 5890
= 5890
5
Calculate Bearing Factor Nc
Bearing Factor Nc
= 30.14
= 30.14