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Safe Bearing Capacity is the maximum pressure which the soil can carry safely without risk of shear failure. Check FAQs
qsa=((CsNc)+((γD)(Nq-1))+(0.5γBNγ)fs)+(γD)
qsa - Safe Bearing Capacity?Cs - Cohesion of Soil?Nc - Bearing Capacity Factor dependent on Cohesion?γ - Unit Weight of Soil?D - Depth of Footing?Nq - Bearing Capacity Factor dependent on Surcharge?B - Width of Footing?Nγ - Bearing Capacity Factor dependent on Unit Weight?fs - Factor of Safety?

Safe Bearing Capacity given Depth and Width of Footing Example

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With units
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Here is how the Safe Bearing Capacity given Depth and Width of Footing equation looks like with Values.

Here is how the Safe Bearing Capacity given Depth and Width of Footing equation looks like with Units.

Here is how the Safe Bearing Capacity given Depth and Width of Footing equation looks like.

51.0949Edit=((5Edit9Edit)+((18Edit1.01Edit)(2.01Edit-1))+(0.518Edit2Edit1.6Edit)2.8Edit)+(18Edit1.01Edit)
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Safe Bearing Capacity given Depth and Width of Footing Solution

Follow our step by step solution on how to calculate Safe Bearing Capacity given Depth and Width of Footing?

FIRST Step Consider the formula
qsa=((CsNc)+((γD)(Nq-1))+(0.5γBNγ)fs)+(γD)
Next Step Substitute values of Variables
qsa=((5kPa9)+((18kN/m³1.01m)(2.01-1))+(0.518kN/m³2m1.6)2.8)+(18kN/m³1.01m)
Next Step Convert Units
qsa=((5000Pa9)+((18000N/m³1.01m)(2.01-1))+(0.518000N/m³2m1.6)2.8)+(18000N/m³1.01m)
Next Step Prepare to Evaluate
qsa=((50009)+((180001.01)(2.01-1))+(0.51800021.6)2.8)+(180001.01)
Next Step Evaluate
qsa=51094.9285714286Pa
Next Step Convert to Output's Unit
qsa=51.0949285714286kN/m²
LAST Step Rounding Answer
qsa=51.0949kN/m²

Safe Bearing Capacity given Depth and Width of Footing Formula Elements

Variables
Safe Bearing Capacity
Safe Bearing Capacity is the maximum pressure which the soil can carry safely without risk of shear failure.
Symbol: qsa
Measurement: PressureUnit: kN/m²
Note: Value should be greater than 0.
Cohesion of Soil
Cohesion of Soil is the ability of like particles within soil to hold onto each other. It is the shear strength or force that binds together like particles in the structure of a soil.
Symbol: Cs
Measurement: PressureUnit: kPa
Note: Value should be greater than 0.
Bearing Capacity Factor dependent on Cohesion
Bearing Capacity Factor dependent on Cohesion is a constant whose value depends upon the cohesion of soil.
Symbol: Nc
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Unit Weight of Soil
Unit Weight of Soil mass is the ratio of the total weight of soil to the total volume of soil.
Symbol: γ
Measurement: Specific WeightUnit: kN/m³
Note: Value should be greater than 0.
Depth of Footing
Depth of Footing is the longer dimension of the footing.
Symbol: D
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Bearing Capacity Factor dependent on Surcharge
Bearing Capacity Factor dependent on Surcharge is a constant whose value depends upon surcharge.
Symbol: Nq
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Width of Footing
Width of Footing is the shorter dimension of the footing.
Symbol: B
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Bearing Capacity Factor dependent on Unit Weight
Bearing Capacity Factor dependent on Unit Weight is a constant whose value depends upon unit weight of soil.
Symbol: Nγ
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Factor of Safety
Factor of Safety expresses how much stronger a system is than it needs to be for an intended load.
Symbol: fs
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.

Other Formulas to find Safe Bearing Capacity

​Go Safe Bearing Capacity given Bearing Capacity Factor
qsa=((CsNc)+(σs(Nq-1))+(0.5γBNγ)fs)+σs

Other formulas in Terzaghi's Analysis in Water Table is Below the Base of Footing category

​Go Ultimate Bearing Capacity given Bearing Capacity Factor
qf=(CsNc)+(γDNq)+(0.5γBNγ)
​Go Cohesion of Soil given Depth and Width of Footing
C=qfc-((γDfootingNq)+(0.5γBNγ))Nc

How to Evaluate Safe Bearing Capacity given Depth and Width of Footing?

Safe Bearing Capacity given Depth and Width of Footing evaluator uses Safe Bearing Capacity = (((Cohesion of Soil*Bearing Capacity Factor dependent on Cohesion)+((Unit Weight of Soil*Depth of Footing)*(Bearing Capacity Factor dependent on Surcharge-1))+(0.5*Unit Weight of Soil*Width of Footing*Bearing Capacity Factor dependent on Unit Weight))/Factor of Safety)+(Unit Weight of Soil*Depth of Footing) to evaluate the Safe Bearing Capacity, The Safe Bearing Capacity given Depth and Width of Footing is defined as the maximum load a soil can support per unit area without failure based on depth and width. Safe Bearing Capacity is denoted by qsa symbol.

How to evaluate Safe Bearing Capacity given Depth and Width of Footing using this online evaluator? To use this online evaluator for Safe Bearing Capacity given Depth and Width of Footing, enter Cohesion of Soil (Cs), Bearing Capacity Factor dependent on Cohesion (Nc), Unit Weight of Soil (γ), Depth of Footing (D), Bearing Capacity Factor dependent on Surcharge (Nq), Width of Footing (B), Bearing Capacity Factor dependent on Unit Weight (Nγ) & Factor of Safety (fs) and hit the calculate button.

FAQs on Safe Bearing Capacity given Depth and Width of Footing

What is the formula to find Safe Bearing Capacity given Depth and Width of Footing?
The formula of Safe Bearing Capacity given Depth and Width of Footing is expressed as Safe Bearing Capacity = (((Cohesion of Soil*Bearing Capacity Factor dependent on Cohesion)+((Unit Weight of Soil*Depth of Footing)*(Bearing Capacity Factor dependent on Surcharge-1))+(0.5*Unit Weight of Soil*Width of Footing*Bearing Capacity Factor dependent on Unit Weight))/Factor of Safety)+(Unit Weight of Soil*Depth of Footing). Here is an example- 0.05103 = (((5000*9)+((18000*1.01)*(2.01-1))+(0.5*18000*2*1.6))/2.8)+(18000*1.01).
How to calculate Safe Bearing Capacity given Depth and Width of Footing?
With Cohesion of Soil (Cs), Bearing Capacity Factor dependent on Cohesion (Nc), Unit Weight of Soil (γ), Depth of Footing (D), Bearing Capacity Factor dependent on Surcharge (Nq), Width of Footing (B), Bearing Capacity Factor dependent on Unit Weight (Nγ) & Factor of Safety (fs) we can find Safe Bearing Capacity given Depth and Width of Footing using the formula - Safe Bearing Capacity = (((Cohesion of Soil*Bearing Capacity Factor dependent on Cohesion)+((Unit Weight of Soil*Depth of Footing)*(Bearing Capacity Factor dependent on Surcharge-1))+(0.5*Unit Weight of Soil*Width of Footing*Bearing Capacity Factor dependent on Unit Weight))/Factor of Safety)+(Unit Weight of Soil*Depth of Footing).
What are the other ways to Calculate Safe Bearing Capacity?
Here are the different ways to Calculate Safe Bearing Capacity-
  • Safe Bearing Capacity=(((Cohesion of Soil*Bearing Capacity Factor dependent on Cohesion)+(Effective Surcharge in KiloPascal*(Bearing Capacity Factor dependent on Surcharge-1))+(0.5*Unit Weight of Soil*Width of Footing*Bearing Capacity Factor dependent on Unit Weight))/Factor of Safety)+Effective Surcharge in KiloPascalOpenImg
Can the Safe Bearing Capacity given Depth and Width of Footing be negative?
No, the Safe Bearing Capacity given Depth and Width of Footing, measured in Pressure cannot be negative.
Which unit is used to measure Safe Bearing Capacity given Depth and Width of Footing?
Safe Bearing Capacity given Depth and Width of Footing is usually measured using the Kilonewton per Square Meter[kN/m²] for Pressure. Pascal[kN/m²], Kilopascal[kN/m²], Bar[kN/m²] are the few other units in which Safe Bearing Capacity given Depth and Width of Footing can be measured.
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