Estimate preliminary wind loading on cylindrical steel poles, including pole surface force, mounted sign or equipment loads and overturning moment.
Pole Geometry
For a cylindrical pole, the projected wind area is approximated from pole diameter × effective height. The drag coefficient and exposure factor are user inputs for preliminary estimating.
Wind Input
The wind-speed method uses q = ½ρV² as a basic velocity-pressure estimate. It is not a complete site-specific wind-code calculation or a substitute for a code-defined height-dependent pressure profile.
Mounted Sign / Equipment
The attachment calculation uses the projected area of the mounted sign or equipment. Enter 0% porosity for a solid panel and a higher value for an open or perforated panel.
Moment Reference
Ready to calculate preliminary pole wind loading.
Wind Load Result
Estimated Base Overturning Moment
—
Applied Pressure
—
kPa
Pole Wind Force
—
kN
Attachment Force
—
kN
Total Wind Force
—
kN
Base Shear
—
kN
Load Summary
Pole Loading
Pole projected area—
Pole drag coefficient—
Pole wind force—
Effective force height—
Pole base moment—
Number of poles—
Attachment Loading
Attachment area—
Effective attachment area—
Attachment force—
Attachment center height—
Attachment moment—
Total base moment—
Detailed Pole Wind Load Takeoff
Item
Value
Unit
Calculation
Steel Pole Wind Load Preview
Wind →
Pole height
The illustration is a simplified cylindrical pole and mounted-panel load reference. It is not a structural drawing.
Cylindrical Pole Wind Area
For a cylindrical pole, the projected wind area is approximated by the pole diameter multiplied by the effective exposed height.
Apole = D × H
The preliminary wind force on the cylindrical pole is then calculated using the applied pressure and the entered drag coefficient.
Fpole =
p × Cd × Apole
Mounted Sign or Equipment Load
A mounted rectangular sign or equipment enclosure adds its own projected wind area and force.
Aattachment =
Width × Height × Quantity
For open or perforated attachments, the effective projected area is reduced using the entered porosity.
Aeffective =
A × (1 − Porosity / 100)
The attachment wind force is calculated using its pressure coefficient and exposure factor.
Fattachment =
p × Cf × Aeffective × Exposure Factor
Base Overturning Moment
The calculator estimates the overturning moment at the selected base reference by multiplying each wind force by its approximate height above the reference.
M = F × h
For the cylindrical pole, a simple uniform-load assumption places the resultant wind force at approximately half the effective pole height.
hpole ≈ H ÷ 2
For a mounted sign or equipment panel, the entered attachment center height is used as its force height.
Wind Pressure Calculation
When direct design pressure is selected, the entered pressure is used as the base wind pressure.
When wind speed is selected, basic velocity pressure is estimated using:
q = ½ρV²
The applied pressure is then adjusted by the entered gust, direction, terrain and height factors.
p =
q × G × D × T × Hf
Important Limitations
This is a preliminary steel pole wind-load estimator.
It does not perform a jurisdiction-specific wind-code calculation.
It does not determine the governing basic wind speed.
It does not calculate code-specific exposure categories.
It does not calculate height-dependent pressure profiles automatically.
It uses simplified projected-area assumptions for cylindrical poles.
It does not calculate pole section capacity.
It does not calculate local buckling or global buckling.
It does not calculate pole deflection or vibration.
It does not calculate fatigue or dynamic wind effects.
It does not design base plates.
It does not design anchor bolts.
It does not design foundations or soil resistance.
It does not automatically account for eccentric mounting geometry.
Actual drag coefficients depend on pole geometry, Reynolds number, attachments and applicable design standards.
Engineering warning: Use this result for preliminary load estimation only. Final pole design should consider the governing wind standard, site conditions, pole taper, diameter, height, thickness, attachments, eccentricity, structural capacity, deflection, connections, foundation and complete load path.
Frequently Asked Questions
What does the Steel Pole Wind Load Calculator calculate?
It estimates preliminary wind pressure, cylindrical pole wind force, mounted attachment force and base overturning moment.
Can I include a sign mounted to the pole?
Yes. Enter the sign width, height, quantity, center height and pressure coefficient.
Can it estimate wind pressure from wind speed?
Yes. The wind-speed option estimates basic velocity pressure using air density and wind speed.
What is the cylindrical pole projected area?
For this preliminary calculation, projected area is approximated as pole diameter multiplied by exposed pole height.
Where is the pole wind force assumed to act?
For a simplified uniform pole load, the resultant is assumed to act approximately at half the effective pole height.
Does it calculate pole diameter or thickness?
No. It calculates wind actions only. Selecting pole diameter, wall thickness and structural capacity requires a separate engineering design.
Does it design the foundation?
No. Foundation design requires the resulting shear and overturning actions together with soil properties, embedment, geometry and applicable requirements.