Wind Directionality Factor given Velocity Pressure Solution

STEP 0: Pre-Calculation Summary
Formula Used
Wind Directionality Factor = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Importance Factor for End Use*Basic Wind Speed^2)
Kd = q/(0.00256*Kz*Kzt*I*VB^2)
This formula uses 6 Variables
Variables Used
Wind Directionality Factor - Wind Directionality Factor reflects the fact that the climatologically and aerodynamically or dynamically most unfavourable wind directions typically do not coincide.
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.
Importance Factor for End Use - Importance Factor for End Use is the factor whose value lies in range 0.8 to 1.2.
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
Importance Factor for End Use: 0.8 --> 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
Kd = q/(0.00256*Kz*Kzt*I*VB^2) --> 29.7632788711526/(0.00256*0.85*25*0.8*29.6107^2)
Evaluating ... ...
Kd = 0.779999884371908
STEP 3: Convert Result to Output's Unit
0.779999884371908 --> No Conversion Required
FINAL ANSWER
0.779999884371908 0.78 <-- Wind Directionality Factor
(Calculation completed in 00.004 seconds)

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Indian Institute of Information Technology (IIIT), Bhopal
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Wind Directionality Factor given Velocity Pressure Formula

​LaTeX ​Go
Wind Directionality Factor = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Importance Factor for End Use*Basic Wind Speed^2)
Kd = q/(0.00256*Kz*Kzt*I*VB^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 Wind Directionality Factor given Velocity Pressure?

Wind Directionality Factor given Velocity Pressure calculator uses Wind Directionality Factor = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Importance Factor for End Use*Basic Wind Speed^2) to calculate the Wind Directionality Factor, The Wind Directionality Factor given Velocity Pressure is defined as the load reduction factor intended to take into account the less than 100% probability that the design event wind direction aligns with the worst case building aerodynamics. Wind Directionality Factor is denoted by Kd symbol.

How to calculate Wind Directionality Factor given Velocity Pressure using this online calculator? To use this online calculator for Wind Directionality Factor given Velocity Pressure, enter Velocity Pressure (q), Velocity Exposure Coefficient (Kz), Topographic Factor (Kzt), Importance Factor for End Use (I) & Basic Wind Speed (VB) and hit the calculate button. Here is how the Wind Directionality Factor given Velocity Pressure calculation can be explained with given input values -> 0.387698 = 29.7632788711526/(0.00256*0.85*25*0.8*29.6107^2).

FAQ

What is Wind Directionality Factor given Velocity Pressure?
The Wind Directionality Factor given Velocity Pressure is defined as the load reduction factor intended to take into account the less than 100% probability that the design event wind direction aligns with the worst case building aerodynamics and is represented as Kd = q/(0.00256*Kz*Kzt*I*VB^2) or Wind Directionality Factor = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Importance Factor for End Use*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, Importance Factor for End Use is the factor whose value lies in range 0.8 to 1.2 & 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 Wind Directionality Factor given Velocity Pressure?
The Wind Directionality Factor given Velocity Pressure is defined as the load reduction factor intended to take into account the less than 100% probability that the design event wind direction aligns with the worst case building aerodynamics is calculated using Wind Directionality Factor = Velocity Pressure/(0.00256*Velocity Exposure Coefficient*Topographic Factor*Importance Factor for End Use*Basic Wind Speed^2). To calculate Wind Directionality Factor given Velocity Pressure, you need Velocity Pressure (q), Velocity Exposure Coefficient (Kz), Topographic Factor (Kzt), Importance Factor for End Use (I) & Basic Wind Speed (VB). With our tool, you need to enter the respective value for Velocity Pressure, Velocity Exposure Coefficient, Topographic Factor, Importance Factor for End Use & Basic Wind Speed and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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