Formula Used
Velocity pressure: q = 0.613 × Kz × Kzt × Kd × G × V² × density adjustment.
Antenna wind force: F = q × Cd × Aeffective.
Overturning moment: M = Σ(F × mounting height).
Seismic force: Fp = Cs × operating weight.
Mast bending stress: σ = M ÷ Z.
Cantilever deflection: δ = F × L³ ÷ (3EI).
Anchor interaction: Ratio = √[(T/Tcap)² + (V/Vcap)²].
The calculator converts all entered values into consistent metric units. It then evaluates pressure, force, moment, stress, deflection, anchors, and reactions. Simplified factors support early planning rather than final certification.
How to Use This Calculator
- Select the project unit system and installation type.
- Add every antenna, radio, mount, cable, and platform load.
- Enter wind, ice, snow, and seismic design inputs.
- Provide mast dimensions, material properties, anchors, and supports.
- Choose a screening load combination or define custom factors.
- Press the calculation button and review every utilization ratio.
- Export the result table for project records or engineering review.
Use accurate manufacturer dimensions and certified equipment weights. Confirm exposure, terrain, wind speed, and seismic values locally. Review any warning or failed utilization with an engineer.
Example Input Data
| Input | Example | Purpose |
|---|---|---|
| Panel antenna | 0.4 m × 2.0 m | Creates frontal wind area. |
| Dish antenna | 0.9 m diameter | Adds circular projected area. |
| Wind speed | 45 m/s | Determines velocity pressure. |
| Mast | 168.3 mm × 6.4 mm | Controls stress and deflection. |
| Anchors | Four bolts on 0.45 m circle | Distributes tension and shear. |
Understanding Antenna Loads in Construction
Antenna installations transfer several forces into buildings, towers, and foundations. Dead load acts continuously through equipment weight. Environmental loads can dominate during severe conditions.
Wind force depends on pressure, shape, orientation, and projected area. Mounting height converts horizontal force into overturning moment. Eccentric brackets may also create damaging torsion.
Ice increases both equipment weight and exposed dimensions. Snow may affect rooftop frames and equipment platforms. Seismic actions depend on mass, mounting elevation, and response characteristics.
Why Mast Checks Matter
A mast behaves approximately like a vertical cantilever. Bending stress often controls strength at the base. Excessive deflection can misalign directional communication equipment.
Wall thickness strongly affects section stiffness and capacity. Small diameter changes may create large performance differences. Corrosion allowances should be considered during final design.
Anchors and Supporting Construction
Anchor bolts resist shear, tension, and combined interaction. Base plates distribute compression into concrete or supporting steel. Rooftop frames must spread reactions into verified structural members.
Parapets and masonry walls require special attachment review. Local breakout, edge distance, and substrate condition may govern. Existing structures also need condition assessment before loading.
Using Preliminary Results Responsibly
Early calculations help compare layouts and identify critical loads. They can guide equipment placement and support sizing. They cannot replace project-specific engineering calculations.
Final designs require approved standards and verified site parameters. Connections, fatigue, buckling, welds, and foundations need detailed checks. Professional review protects workers, property, and communication service reliability.
Frequently Asked Questions
Does the calculator replace a structural engineer?
No. It provides preliminary screening and planning results only.
Can I enter several antennas?
Yes. Add rows for different types, elevations, and orientations.
How is shielding handled?
Each antenna includes a user-adjustable shielding factor.
Can I use custom wind pressure?
Yes. Enter pressure directly to override the calculated value.
Does it calculate ice weight?
Yes. It estimates additional volume from radial ice thickness.
How are anchor forces estimated?
Moment creates bolt tension, while horizontal load creates shear.
What does utilization mean?
Utilization compares calculated demand with entered strength or capacity.
Can I save my project inputs?
Yes. The page stores and reloads inputs using browser storage.
How do I create a PDF report?
Calculate first, then select the PDF download button.