Allowable Load using Safety Factors Calculator

✖Shaft Resistance is the load-bearing capacity of deep foundations such as piles or drilled shafts, derived from the frictional resistance along the sides of the shaft.ⓘ Shaft Resistance [Q _su]			+10% -10%
✖Factor of Safety F1 expresses how much stronger a system is than it needs to be for an intended load.ⓘ Factor of Safety F1 [F1]			+10% -10%
✖Toe Resistance is the capacity of the soil at the base or toe of a structure (such as a retaining wall, foundation, or slope) to resist sliding or overturning.ⓘ Toe Resistance [Q _bu]			+10% -10%
✖Factor of Safety F2 is the ratio of the maximum load that a system can withstand to the actual applied load.ⓘ Factor of Safety F2 [F2]			+10% -10%

✖Allowable Load is the maximum working load that can be applied on the structure.ⓘ Allowable Load using Safety Factors [P_allow]

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Allowable Load using Safety Factors Solution

STEP 0: Pre-Calculation Summary

Formula Used

Allowable Load = (Shaft Resistance/Factor of Safety F1)+(Toe Resistance/Factor of Safety F2)
P_allow = (Q _su/F1)+(Q _bu/F2)
This formula uses 5 Variables

Variables Used

Allowable Load - (Measured in Newton) - Allowable Load is the maximum working load that can be applied on the structure.
Shaft Resistance - (Measured in Newton) - Shaft Resistance is the load-bearing capacity of deep foundations such as piles or drilled shafts, derived from the frictional resistance along the sides of the shaft.
Factor of Safety F1 - Factor of Safety F1 expresses how much stronger a system is than it needs to be for an intended load.
Toe Resistance - (Measured in Newton) - Toe Resistance is the capacity of the soil at the base or toe of a structure (such as a retaining wall, foundation, or slope) to resist sliding or overturning.
Factor of Safety F2 - Factor of Safety F2 is the ratio of the maximum load that a system can withstand to the actual applied load.

STEP 1: Convert Input(s) to Base Unit

Shaft Resistance: 17.77 Kilonewton --> 17770 Newton (Check conversion here)
Factor of Safety F1: 2.5 --> No Conversion Required
Toe Resistance: 10.23 Kilonewton --> 10230 Newton (Check conversion here)
Factor of Safety F2: 1.89 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

P_allow = (Q _su/F1)+(Q _bu/F2) --> (17770/2.5)+(10230/1.89)

Evaluating ... ...

P_allow = 12520.6984126984

STEP 3: Convert Result to Output's Unit

12520.6984126984 Newton -->12.5206984126984 Kilonewton (Check conversion here)

FINAL ANSWER

12.5206984126984 ≈ 12.5207 Kilonewton <-- Allowable Load

(Calculation completed in 00.004 seconds)

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Home » Engineering » Civil » Geotechnical Engineering » Pile Foundations » Axial Load Capacity of Single Piles » Allowable Load using Safety Factors

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Created by Alithea Fernandes

Don Bosco College of Engineering (DBCE), Goa

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< Axial Load Capacity of Single Piles Calculators

Allowable Load using Safety Factors

LaTeX Go Allowable Load = (Shaft Resistance/Factor of Safety F1)+(Toe Resistance/Factor of Safety F2)

Shaft Resistance using Allowable Load and Safety Factor

LaTeX Go Shaft Resistance = (Factor of Safety in Pile Foundation*Allowable Load)-Toe Resistance

Allowable Load for given Safety Factor

LaTeX Go Allowable Load = (Shaft Resistance+Toe Resistance)/Factor of Safety in Pile Foundation

Pile Capacity

LaTeX Go Pile Capacity = Shaft Resistance+Toe Resistance

Allowable Load using Safety Factors Formula

LaTeX Go

Allowable Load = (Shaft Resistance/Factor of Safety F1)+(Toe Resistance/Factor of Safety F2)
P_allow = (Q _su/F1)+(Q _bu/F2)

What is Factor of Safety?

A Factor of Safety, also known as safety factor, expresses how much stronger a system is than it needs to be for an intended load. Safety factors are often calculated using detailed analysis because comprehensive testing is impractical on many projects, such as bridges and buildings, but the structure's ability to carry a load must be determined to a reasonable accuracy.

How to Calculate Allowable Load using Safety Factors?

Allowable Load using Safety Factors calculator uses Allowable Load = (Shaft Resistance/Factor of Safety F1)+(Toe Resistance/Factor of Safety F2) to calculate the Allowable Load, The Allowable Load using Safety Factors formula is defined as the maximum working load which can be applied on the pile, considering different safety factors for shaft resistance and toe resistance. Allowable Load is denoted by P_allow symbol.

How to calculate Allowable Load using Safety Factors using this online calculator? To use this online calculator for Allowable Load using Safety Factors, enter Shaft Resistance (Q _su), Factor of Safety F1 (F1), Toe Resistance (Q _bu) & Factor of Safety F2 (F2) and hit the calculate button. Here is how the Allowable Load using Safety Factors calculation can be explained with given input values -> 0.009673 = (17770/2.5)+(10230/1.89).

FAQ

What is Allowable Load using Safety Factors?

The Allowable Load using Safety Factors formula is defined as the maximum working load which can be applied on the pile, considering different safety factors for shaft resistance and toe resistance and is represented as P_allow = (Q _su/F1)+(Q _bu/F2) or Allowable Load = (Shaft Resistance/Factor of Safety F1)+(Toe Resistance/Factor of Safety F2). Shaft Resistance is the load-bearing capacity of deep foundations such as piles or drilled shafts, derived from the frictional resistance along the sides of the shaft, Factor of Safety F1 expresses how much stronger a system is than it needs to be for an intended load, Toe Resistance is the capacity of the soil at the base or toe of a structure (such as a retaining wall, foundation, or slope) to resist sliding or overturning & Factor of Safety F2 is the ratio of the maximum load that a system can withstand to the actual applied load.

How to calculate Allowable Load using Safety Factors?

The Allowable Load using Safety Factors formula is defined as the maximum working load which can be applied on the pile, considering different safety factors for shaft resistance and toe resistance is calculated using Allowable Load = (Shaft Resistance/Factor of Safety F1)+(Toe Resistance/Factor of Safety F2). To calculate Allowable Load using Safety Factors, you need Shaft Resistance (Q _su), Factor of Safety F1 (F1), Toe Resistance (Q _bu) & Factor of Safety F2 (F2). With our tool, you need to enter the respective value for Shaft Resistance, Factor of Safety F1, Toe Resistance & Factor of Safety F2 and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Allowable Load?

In this formula, Allowable Load uses Shaft Resistance, Factor of Safety F1, Toe Resistance & Factor of Safety F2. We can use 1 other way(s) to calculate the same, which is/are as follows -

Allowable Load = (Shaft Resistance+Toe Resistance)/Factor of Safety in Pile Foundation

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