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Allowable Load for given Safety Factor Formula

GoAllowable Load using Safety Factors Formula

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Allowable Load is the maximum working load that can be applied on the structure. Check FAQs

P allow = \frac{Q su + Q bu}{F s}

P_allow - Allowable Load?Q _su - Shaft Resistance?Q _bu - Toe Resistance?F_s - Factor of Safety in Pile Foundation?

Allowable Load for given Safety Factor Example

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Here is how the Allowable Load for given Safety Factor equation looks like with Values.

Here is how the Allowable Load for given Safety Factor equation looks like with Units.

Here is how the Allowable Load for given Safety Factor equation looks like.

10 = \frac{17.77 + 10.23}{2.8}

10kN = \frac{17.77kN + 10.23kN}{2.8}

10 = \frac{17.77 + 10.23}{2.8}

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Allowable Load for given Safety Factor Solution

Follow our step by step solution on how to calculate Allowable Load for given Safety Factor?

FIRST Step Consider the formula

P allow = \frac{Q su + Q bu}{F s}

Next Step Substitute values of Variables

∴

P allow = \frac{17.77kN + 10.23kN}{2.8}

Next Step Convert Units

∴

P allow = \frac{17770N + 10230N}{2.8}

Next Step Prepare to Evaluate

∴

P allow = \frac{17770 + 10230}{2.8}

Next Step Evaluate

∴

P allow = 10000N

LAST Step Convert to Output's Unit

∴

P allow = 10kN

Allowable Load for given Safety Factor Formula Elements

Variables

Allowable Load

Allowable Load is the maximum working load that can be applied on the structure.

Symbol: P_allow

Measurement: ForceUnit: kN

Note: Value can be positive or negative.

Formulas to find Allowable Load

Shaft Resistance

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.

Symbol: Q _su

Measurement: ForceUnit: kN

Note: Value should be greater than 0.

Formulas to find Shaft Resistance

Toe Resistance

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.

Symbol: Q _bu

Measurement: ForceUnit: kN

Note: Value should be greater than 0.

Formulas to find Toe Resistance

Factor of Safety in Pile Foundation

Factor of Safety in Pile Foundation is the ratio of the ultimate capacity of the pile to the working load (the load the pile is designed to carry safely).

Symbol: F_s

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Factor of Safety in Pile Foundation

Other Formulas to find Allowable Load

Go Allowable Load using Safety Factors

P allow = (\frac{Q su}{F1}) + (\frac{Q bu}{F2})

Other formulas in Axial Load Capacity of Single Piles category

Go Pile Capacity

Q u = Q su + Q bu

Go Shaft Resistance using Allowable Load and Safety Factor

Q su = (F s \cdot P allow) - Q bu

Go Toe Resistance using Allowable Load and Safety Factor

Q bu = (P allow \cdot F s) - Q su

How to Evaluate Allowable Load for given Safety Factor?

Allowable Load for given Safety Factor evaluator uses Allowable Load = (Shaft Resistance+Toe Resistance)/Factor of Safety in Pile Foundation to evaluate the Allowable Load, The Allowable Load for given Safety Factor formula is defined as the maximum working load that can be applied on the pile. Allowable Load is denoted by P_allow symbol.

How to evaluate Allowable Load for given Safety Factor using this online evaluator? To use this online evaluator for Allowable Load for given Safety Factor, enter Shaft Resistance (Q _su), Toe Resistance (Q _bu) & Factor of Safety in Pile Foundation (F_s) and hit the calculate button.

FAQs on Allowable Load for given Safety Factor

What is the formula to find Allowable Load for given Safety Factor?

The formula of Allowable Load for given Safety Factor is expressed as Allowable Load = (Shaft Resistance+Toe Resistance)/Factor of Safety in Pile Foundation. Here is an example- 0.007457 = (17770+10230)/2.8.

How to calculate Allowable Load for given Safety Factor?

With Shaft Resistance (Q _su), Toe Resistance (Q _bu) & Factor of Safety in Pile Foundation (F_s) we can find Allowable Load for given Safety Factor using the formula - Allowable Load = (Shaft Resistance+Toe Resistance)/Factor of Safety in Pile Foundation.

What are the other ways to Calculate Allowable Load?

Here are the different ways to Calculate Allowable Load-

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

Can the Allowable Load for given Safety Factor be negative?

Yes, the Allowable Load for given Safety Factor, measured in Force can be negative.

Which unit is used to measure Allowable Load for given Safety Factor?

Allowable Load for given Safety Factor is usually measured using the Kilonewton[kN] for Force. Newton[kN], Exanewton[kN], Meganewton[kN] are the few other units in which Allowable Load for given Safety Factor can be measured.

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Allowable Load for given Safety Factor Formula

​GoAllowable Load using Safety Factors Formula

Allowable Load for given Safety Factor Example

Allowable Load for given Safety Factor Solution

Allowable Load for given Safety Factor Formula Elements

Other Formulas to find Allowable Load

Other formulas in Axial Load Capacity of Single Piles category

How to Evaluate Allowable Load for given Safety Factor?

FAQs on Allowable Load for given Safety Factor

Variable Name

GoAllowable Load using Safety Factors Formula