ANSI TIA EIA 222 G Wind Load Calculations

WIND LOADS ON A TOWER

(IN ACCORDANCE WITH ANSI/TIA/EIA-222-G)

Project Title : Project No. : Design By : Checked By :

Dated : Page No. : Segment No. : Total Segments :

INPUT DATA Basic Wind Speed (3-Second Gust) V 1 Height of Structure h 1 Height of Crest Above Surrounding Terrain H 1 Height of Mid Point of Object Above The Ground Level z 1 Diameter of Pole or Appurtenance D 1 Class of Structture I Laticed Structure with Triangular Cross Section Type of Structure Cross Section of Tubular Pole Type Structure Not Applicable Exposure Category B Topographic Category 1 Gross Area of Tower / Segment Face Under Consideration 1 Ag Projected Area of Flat Structural Components in one Face of Segment 1 Af Projected Area of round Structural Components in one Face of Segment 1 Ar Projected Area of Face of Segment of Pole Structure 1 AP Projected Area of Appurtenance in one Face of Segment (EPA) A Reduction Factor of a Round Element for Transitional Flow (Situational) Rr Projected Area of Appurtenances in one Face of Segment 1 (EPA) A

m/s m m m m

m² m² m² m² m² m²

CALCULATIONS Wind Direction Probability Factor Importance Factor Nominal Height of Atmospheric Boundary Layer 3-Second Gust Wind Speed Power Law Exponent Minimum Value for Velocity Pressure Coefficient Terrain Constant Topographic Constant Height Attenuation Factor Solidity Ratio

Kd I Zg

a K zmin Ke Kt f

e

Wind Direction Factor for Structural Components of Square Section Tower at Direction of 45° Height Reduction Factor Topographic Factor Velocity Pressure Coefficient Gust Effect Factor Velocity Coefficient Force Coefficient C F (Pole Structures) for C