Cross Section Types
TowerPlot supports two cross-section configurations for self-supporting towers.
Triangular (3-Leg)
- 3 legs arranged in an equilateral triangle
- Wind analyzed at 0°, 60°, and 90° per TIA-222-H
- Lighter weight, common for towers up to 60m
- Force coefficients from TIA-222-H Table 2-8 (3-sided)
Faces: A (front), B (left-rear), C (right-rear)
When to use: Standard telecom towers with moderate antenna loading. Most efficient for heights under 60m.
Square (4-Leg)
- 4 legs arranged in a square
- Wind analyzed at 0°, 45°, and 90° per TIA-222-H
- Higher capacity, common for heavy-loaded towers and heights > 60m
- Force coefficients from TIA-222-H Table 2-8 (4-sided)
- Shielding factor applies to leeward face per TIA-222-H Section 2.6.9.2
Faces: A (front), B (right), C (rear), D (left)
When to use: Heavy antenna loading, tall towers (>60m), or sites requiring maximum capacity and stiffness.
Comparison
| Property | Triangular | Square |
|---|---|---|
| Legs | 3 | 4 |
| Wind directions analyzed | 3 (0°, 60°, 90°) | 3 (0°, 45°, 90°) |
| Weight efficiency | Higher (less steel) | Lower (more steel) |
| Load capacity | Moderate | High |
| Torsional stiffness | Lower | Higher |
| Foundation points | 3 | 4 |
| Typical height range | Up to 60m | 30m – 200m |