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Allowable Load using Safety Factors Formula

GoAllowable Load for given Safety Factor 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}{F1}) + (\frac{Q bu}{F2})

P_allow - Allowable Load?Q _su - Shaft Resistance?F1 - Factor of Safety F1?Q _bu - Toe Resistance?F2 - Factor of Safety F2?

Allowable Load using Safety Factors Example

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Here is how the Allowable Load using Safety Factors equation looks like with Values.

Here is how the Allowable Load using Safety Factors equation looks like with Units.

Here is how the Allowable Load using Safety Factors equation looks like.

12.5207 = (\frac{17.77}{2.5}) + (\frac{10.23}{1.89})

12.5207kN = (\frac{17.77kN}{2.5}) + (\frac{10.23kN}{1.89})

12.5207 = (\frac{17.77}{2.5}) + (\frac{10.23}{1.89})

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Allowable Load using Safety Factors Solution

Follow our step by step solution on how to calculate Allowable Load using Safety Factors?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

P allow = (\frac{17.77kN}{2.5}) + (\frac{10.23kN}{1.89})

Next Step Convert Units

∴

P allow = (\frac{17770N}{2.5}) + (\frac{10230N}{1.89})

Next Step Prepare to Evaluate

∴

P allow = (\frac{17770}{2.5}) + (\frac{10230}{1.89})

Next Step Evaluate

∴

P allow = 12520.6984126984N

Next Step Convert to Output's Unit

∴

P allow = 12.5206984126984kN

LAST Step Rounding Answer

∴

P allow = 12.5207kN

Allowable Load using Safety Factors 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

Factor of Safety F1

Factor of Safety F1 expresses how much stronger a system is than it needs to be for an intended load.

Symbol: F1

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Factor of Safety F1

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 F2

Factor of Safety F2 is the ratio of the maximum load that a system can withstand to the actual applied load.

Symbol: F2

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Factor of Safety F2

Other Formulas to find Allowable Load

Go Allowable Load for given Safety Factor

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

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 using Safety Factors?

Allowable Load using Safety Factors evaluator uses Allowable Load = (Shaft Resistance/Factor of Safety F1)+(Toe Resistance/Factor of Safety F2) to evaluate 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 evaluate Allowable Load using Safety Factors using this online evaluator? To use this online evaluator 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.

FAQs on Allowable Load using Safety Factors

What is the formula to find Allowable Load using Safety Factors?

The formula of Allowable Load using Safety Factors is expressed as Allowable Load = (Shaft Resistance/Factor of Safety F1)+(Toe Resistance/Factor of Safety F2). Here is an example- 0.009673 = (17770/2.5)+(10230/1.89).

How to calculate Allowable Load using Safety Factors?

With Shaft Resistance (Q _su), Factor of Safety F1 (F1), Toe Resistance (Q _bu) & Factor of Safety F2 (F2) we can find Allowable Load using Safety Factors using the formula - Allowable Load = (Shaft Resistance/Factor of Safety F1)+(Toe Resistance/Factor of Safety F2).

What are the other ways to Calculate Allowable Load?

Here are the different ways to Calculate Allowable Load-

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

Can the Allowable Load using Safety Factors be negative?

Yes, the Allowable Load using Safety Factors, measured in Force can be negative.

Which unit is used to measure Allowable Load using Safety Factors?

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

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Allowable Load using Safety Factors Formula

​GoAllowable Load for given Safety Factor Formula

Allowable Load using Safety Factors Example

Allowable Load using Safety Factors Solution

Allowable Load using Safety Factors Formula Elements

Other Formulas to find Allowable Load

Other formulas in Axial Load Capacity of Single Piles category

How to Evaluate Allowable Load using Safety Factors?

FAQs on Allowable Load using Safety Factors

Variable Name

GoAllowable Load for given Safety Factor Formula