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Shaft Resistance using Allowable Load and Safety Factor Formula

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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. Check FAQs

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

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

Shaft Resistance using Allowable Load and Safety Factor Example

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Here is how the Shaft Resistance using Allowable Load and Safety Factor equation looks like with Values.

Here is how the Shaft Resistance using Allowable Load and Safety Factor equation looks like with Units.

Here is how the Shaft Resistance using Allowable Load and Safety Factor equation looks like.

17.77 = (2.8 \cdot 10) - 10.23

17.77kN = (2.8 \cdot 10kN) - 10.23kN

17.77 = (2.8 \cdot 10) - 10.23

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Shaft Resistance using Allowable Load and Safety Factor Solution

Follow our step by step solution on how to calculate Shaft Resistance using Allowable Load and Safety Factor?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

Q su = (2.8 \cdot 10kN) - 10.23kN

Next Step Convert Units

∴

Q su = (2.8 \cdot 10000N) - 10230N

Next Step Prepare to Evaluate

∴

Q su = (2.8 \cdot 10000) - 10230

Next Step Evaluate

∴

Q su = 17770N

LAST Step Convert to Output's Unit

∴

Q su = 17.77kN

Shaft Resistance using Allowable Load and Safety Factor Formula Elements

Variables

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 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

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

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

Other formulas in Axial Load Capacity of Single Piles category

Go Allowable Load for given Safety Factor

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

Go Allowable Load using Safety Factors

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

Go Pile Capacity

Q u = Q su + Q bu

Go Toe Resistance using Allowable Load and Safety Factor

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

How to Evaluate Shaft Resistance using Allowable Load and Safety Factor?

Shaft Resistance using Allowable Load and Safety Factor evaluator uses Shaft Resistance = (Factor of Safety in Pile Foundation*Allowable Load)-Toe Resistance to evaluate the Shaft Resistance, The Shaft Resistance using Allowable Load and Safety Factor formula is defined as the load resisted by the pile's shaft, considering allowable load and safety factor. Shaft Resistance is denoted by Q _su symbol.

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

FAQs on Shaft Resistance using Allowable Load and Safety Factor

What is the formula to find Shaft Resistance using Allowable Load and Safety Factor?

The formula of Shaft Resistance using Allowable Load and Safety Factor is expressed as Shaft Resistance = (Factor of Safety in Pile Foundation*Allowable Load)-Toe Resistance. Here is an example- 0.01777 = (2.8*10000)-10230.

How to calculate Shaft Resistance using Allowable Load and Safety Factor?

With Factor of Safety in Pile Foundation (F_s), Allowable Load (P_allow) & Toe Resistance (Q _bu) we can find Shaft Resistance using Allowable Load and Safety Factor using the formula - Shaft Resistance = (Factor of Safety in Pile Foundation*Allowable Load)-Toe Resistance.

Can the Shaft Resistance using Allowable Load and Safety Factor be negative?

No, the Shaft Resistance using Allowable Load and Safety Factor, measured in Force cannot be negative.

Which unit is used to measure Shaft Resistance using Allowable Load and Safety Factor?

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

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Shaft Resistance using Allowable Load and Safety Factor Formula

Shaft Resistance using Allowable Load and Safety Factor Example

Shaft Resistance using Allowable Load and Safety Factor Solution

Shaft Resistance using Allowable Load and Safety Factor Formula Elements

Other formulas in Axial Load Capacity of Single Piles category

How to Evaluate Shaft Resistance using Allowable Load and Safety Factor?

FAQs on Shaft Resistance using Allowable Load and Safety Factor

Variable Name