Importance Factor using Velocity Pressure Calculator

✖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.ⓘ Velocity Pressure [q]			+10% -10%
✖Velocity Exposure Coefficient is evaluated at some height z.ⓘ Velocity Exposure Coefficient [K_z]			+10% -10%
✖Topographic Factor are also called indirect factors as they influence the growth and development of organisms by bringing variations in climatic factors.ⓘ Topographic Factor [K_zt]			+10% -10%
✖Wind Directionality Factor reflects the fact that the climatologically and aerodynamically or dynamically most unfavourable wind directions typically do not coincide.ⓘ Wind Directionality Factor [K_d]			+10% -10%
✖Basic Wind Speed is the wind speed corresponding to a 3-s gust speed at 33 ft above the ground in Exposure C.ⓘ Basic Wind Speed [V_B]			+10% -10%

✖Importance Factor for End Use is the factor whose value lies in range 0.8 to 1.2.ⓘ Importance Factor using Velocity Pressure [I]

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Formula

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Importance Factor using Velocity Pressure

Formula

I = \frac{q}{0.00256 \cdot K z \cdot K zt \cdot K d \cdot {V B}^{2}}

Example

0.8 = \frac{20 pdl/ft²}{0.00256 \cdot 0.85 \cdot 25 \cdot 0.78 \cdot {29.6107 m/s}^{2}}

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Importance Factor using Velocity Pressure Solution

STEP 0: Pre-Calculation Summary

Formula Used

Importance Factor for End Use = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Wind Directionality Factor*Basic Wind Speed^2)
I = q/(0.00256*K_z*K_zt*K_d*V_B^2)
This formula uses 6 Variables

Variables Used

Importance Factor for End Use - Importance Factor for End Use is the factor whose value lies in range 0.8 to 1.2.
Velocity Pressure - (Measured in Pascal) - 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.
Velocity Exposure Coefficient - Velocity Exposure Coefficient is evaluated at some height z.
Topographic Factor - Topographic Factor are also called indirect factors as they influence the growth and development of organisms by bringing variations in climatic factors.
Wind Directionality Factor - Wind Directionality Factor reflects the fact that the climatologically and aerodynamically or dynamically most unfavourable wind directions typically do not coincide.
Basic Wind Speed - (Measured in Meter per Second) - Basic Wind Speed is the wind speed corresponding to a 3-s gust speed at 33 ft above the ground in Exposure C.

STEP 1: Convert Input(s) to Base Unit

Velocity Pressure: 20 Poundal per Square Foot --> 29.7632788711526 Pascal (Check conversion here)
Velocity Exposure Coefficient: 0.85 --> No Conversion Required
Topographic Factor: 25 --> No Conversion Required
Wind Directionality Factor: 0.78 --> No Conversion Required
Basic Wind Speed: 29.6107 Meter per Second --> 29.6107 Meter per Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I = q/(0.00256*K_z*K_zt*K_d*V_B^2) --> 29.7632788711526/(0.00256*0.85*25*0.78*29.6107^2)

Evaluating ... ...

I = 0.799999881407085

STEP 3: Convert Result to Output's Unit

0.799999881407085 --> No Conversion Required

FINAL ANSWER

0.799999881407085 ≈ 0.8 <-- Importance Factor for End Use

(Calculation completed in 00.004 seconds)

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Indian Institute of Information Technology (IIIT), Bhopal

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< Wind Loads Calculators

Gust Response Factor using Wind Pressure

Go Gust Response Factor = Wind Pressure/(Velocity Pressure*Pressure Coefficient)

Pressure Coefficient using Wind Pressure

Go Pressure Coefficient = Wind Pressure/(Velocity Pressure*Gust Response Factor)

Velocity Pressure using Wind Pressure

Go Velocity Pressure = Wind Pressure/(Gust Response Factor*Pressure Coefficient)

Equivalent Static Design Wind Pressure

Go Wind Pressure = Velocity Pressure*Gust Response Factor*Pressure Coefficient

Importance Factor using Velocity Pressure Formula

Importance Factor for End Use = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Wind Directionality Factor*Basic Wind Speed^2)
I = q/(0.00256*K_z*K_zt*K_d*V_B^2)

What is Wind Directionality Factor?

The wind directionality factor, Kd, is a nondimensional quantity smaller than unity that reflects the fact that the climatologically and aerodynamically or dynamically most unfavorable wind directions typically do not coincide.

How to Calculate Importance Factor using Velocity Pressure?

Importance Factor using Velocity Pressure calculator uses Importance Factor for End Use = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Wind Directionality Factor*Basic Wind Speed^2) to calculate the Importance Factor for End Use, The Importance Factor using Velocity Pressure is defined as to find the Importance factor for end-use which is essentially a multiplier that increases or decreases the base design loads. Importance Factor for End Use is denoted by I symbol.

How to calculate Importance Factor using Velocity Pressure using this online calculator? To use this online calculator for Importance Factor using Velocity Pressure, enter Velocity Pressure (q), Velocity Exposure Coefficient (K_z), Topographic Factor (K_zt), Wind Directionality Factor (K_d) & Basic Wind Speed (V_B) and hit the calculate button. Here is how the Importance Factor using Velocity Pressure calculation can be explained with given input values -> 0.397639 = 29.7632788711526/(0.00256*0.85*25*0.78*29.6107^2).

FAQ

What is Importance Factor using Velocity Pressure?

The Importance Factor using Velocity Pressure is defined as to find the Importance factor for end-use which is essentially a multiplier that increases or decreases the base design loads and is represented as I = q/(0.00256*K_z*K_zt*K_d*V_B^2) or Importance Factor for End Use = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Wind Directionality Factor*Basic Wind Speed^2). 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, Velocity Exposure Coefficient is evaluated at some height z, Topographic Factor are also called indirect factors as they influence the growth and development of organisms by bringing variations in climatic factors, Wind Directionality Factor reflects the fact that the climatologically and aerodynamically or dynamically most unfavourable wind directions typically do not coincide & Basic Wind Speed is the wind speed corresponding to a 3-s gust speed at 33 ft above the ground in Exposure C.

How to calculate Importance Factor using Velocity Pressure?

The Importance Factor using Velocity Pressure is defined as to find the Importance factor for end-use which is essentially a multiplier that increases or decreases the base design loads is calculated using Importance Factor for End Use = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Wind Directionality Factor*Basic Wind Speed^2). To calculate Importance Factor using Velocity Pressure, you need Velocity Pressure (q), Velocity Exposure Coefficient (K_z), Topographic Factor (K_zt), Wind Directionality Factor (K_d) & Basic Wind Speed (V_B). With our tool, you need to enter the respective value for Velocity Pressure, Velocity Exposure Coefficient, Topographic Factor, Wind Directionality Factor & Basic Wind Speed 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 Importance Factor for End Use?

In this formula, Importance Factor for End Use uses Velocity Pressure, Velocity Exposure Coefficient, Topographic Factor, Wind Directionality Factor & Basic Wind Speed. We can use 1 other way(s) to calculate the same, which is/are as follows -

Importance Factor for End Use = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Wind Directionality Factor*Basic Wind Speed^2)

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