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External Pressure Coefficient as given by ASCE 7 Formula

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The External Pressure Coefficient is the coefficient for the external pressure. Check FAQs

C ep = \frac{p + q i \cdot GC pt}{G \cdot q}

C_ep - External Pressure Coefficient?p - Wind Pressure?q_i - Velocity Pressure at Point?GC_pt - Internal Pressure Coefficient?G - Gust Response Factor?q - Velocity Pressure?

External Pressure Coefficient as given by ASCE 7 Example

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Here is how the External Pressure Coefficient as given by ASCE 7 equation looks like with Values.

Here is how the External Pressure Coefficient as given by ASCE 7 equation looks like with Units.

Here is how the External Pressure Coefficient as given by ASCE 7 equation looks like.

1.1887 = \frac{14.88 + 15 \cdot 0.91}{1.2 \cdot 20}

1.1887 = \frac{14.88pdl/ft² + 15pdl/ft² \cdot 0.91}{1.2 \cdot 20pdl/ft²}

1.1887 = \frac{14.88 + 15 \cdot 0.91}{1.2 \cdot 20}

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External Pressure Coefficient as given by ASCE 7 Solution

Follow our step by step solution on how to calculate External Pressure Coefficient as given by ASCE 7?

FIRST Step Consider the formula

C ep = \frac{p + q i \cdot GC pt}{G \cdot q}

Next Step Substitute values of Variables

∴

C ep = \frac{14.88pdl/ft² + 15pdl/ft² \cdot 0.91}{1.2 \cdot 20pdl/ft²}

Next Step Convert Units

∴

C ep = \frac{22.1439Pa + 22.3225Pa \cdot 0.91}{1.2 \cdot 29.7633Pa}

Next Step Prepare to Evaluate

∴

C ep = \frac{22.1439 + 22.3225 \cdot 0.91}{1.2 \cdot 29.7633}

Next Step Evaluate

∴

C ep = 1.18875

LAST Step Rounding Answer

∴

C ep = 1.1887

External Pressure Coefficient as given by ASCE 7 Formula Elements

Variables

External Pressure Coefficient

The External Pressure Coefficient is the coefficient for the external pressure.

Symbol: C_ep

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find External Pressure Coefficient

Wind Pressure

Wind Pressure is the pressure due to the wind.

Symbol: p

Measurement: PressureUnit: pdl/ft²

Note: Value should be greater than 0.

Formulas to find Wind Pressure

Velocity Pressure at Point

Velocity Pressure at Point is the pressure due to the velocity of wind at some point.

Symbol: q_i

Measurement: PressureUnit: pdl/ft²

Note: Value should be greater than 0.

Formulas to find Velocity Pressure at Point

Internal Pressure Coefficient

Internal Pressure Coefficient refers to the pressure inside a building, perhaps due to flow past or through openings in the structure.

Symbol: GC_pt

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Internal Pressure Coefficient

Gust Response Factor

The Gust Response Factor is to account for fluctuations in wind speed.

Symbol: G

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Gust Response Factor

Velocity Pressure

Velocity Pressure is the pressure required to accelerate air from zero velocity to some velocity and is proportional to the kinetic energy of the air stream.

Symbol: q

Measurement: PressureUnit: pdl/ft²

Note: Value should be greater than 0.

Formulas to find Velocity Pressure

Other formulas in Wind Loads category

Go Equivalent Static Design Wind Pressure

p = q \cdot G \cdot C p

Go Velocity Pressure using Wind Pressure

q = \frac{p}{G \cdot C p}

Go Gust Response Factor using Wind Pressure

G = \frac{p}{q \cdot C p}

Go Pressure Coefficient using Wind Pressure

C p = \frac{p}{q \cdot G}

How to Evaluate External Pressure Coefficient as given by ASCE 7?

External Pressure Coefficient as given by ASCE 7 evaluator uses External Pressure Coefficient = (Wind Pressure+Velocity Pressure at Point*Internal Pressure Coefficient)/(Gust Response Factor*Velocity Pressure) to evaluate the External Pressure Coefficient, The External Pressure Coefficient as given by ASCE 7 is defined as the external pressure coefficient as per ASCE 7 Method II norms considering wind pressure, external and internal pressure coefficients. External Pressure Coefficient is denoted by C_ep symbol.

How to evaluate External Pressure Coefficient as given by ASCE 7 using this online evaluator? To use this online evaluator for External Pressure Coefficient as given by ASCE 7, enter Wind Pressure (p), Velocity Pressure at Point (q_i), Internal Pressure Coefficient (GC_pt), Gust Response Factor (G) & Velocity Pressure (q) and hit the calculate button.

FAQs on External Pressure Coefficient as given by ASCE 7

What is the formula to find External Pressure Coefficient as given by ASCE 7?

The formula of External Pressure Coefficient as given by ASCE 7 is expressed as External Pressure Coefficient = (Wind Pressure+Velocity Pressure at Point*Internal Pressure Coefficient)/(Gust Response Factor*Velocity Pressure). Here is an example- 1.1825 = (22.1438794801375+22.3224591533644*0.91)/(1.2*29.7632788711526).

How to calculate External Pressure Coefficient as given by ASCE 7?

With Wind Pressure (p), Velocity Pressure at Point (q_i), Internal Pressure Coefficient (GC_pt), Gust Response Factor (G) & Velocity Pressure (q) we can find External Pressure Coefficient as given by ASCE 7 using the formula - External Pressure Coefficient = (Wind Pressure+Velocity Pressure at Point*Internal Pressure Coefficient)/(Gust Response Factor*Velocity Pressure).

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External Pressure Coefficient as given by ASCE 7 Formula

External Pressure Coefficient as given by ASCE 7 Example

External Pressure Coefficient as given by ASCE 7 Solution

External Pressure Coefficient as given by ASCE 7 Formula Elements

Other formulas in Wind Loads category

How to Evaluate External Pressure Coefficient as given by ASCE 7?

FAQs on External Pressure Coefficient as given by ASCE 7

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