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<4.4 (Subcritical) Force Coefficient C F (Pole Structures) for 4.48.7 (Supercritical) Applicable Force Coefficient for Pole Structure Force Coefficient for Latticed Structure Reduction Factor of a Round Element

Df & Dr

0.85 0.87 366 m 7 0.7 0.9 0 0 2

Table: 2-2 Table: 2-3 Table: 2-4 Table: 2-4 Table: 2-4 Table: 2-4 Table: 2-5 Table: 2-5 Section: 2.6.9.1.1

1.2

Table: 2-6

CF CF Rr

0.367917586 1 0.7 0.85 0.780384521 N/A N/A N/A N/A 7.6 1

Section: 2.6.6.4 Section: 2.6.6.4 Section: 2.6.5.2 Section: 2.6.7 Table: 2-7 Table: 2-7 Table: 2-7 Table: 2-7 Table: 2-7 Section: 2.6.9.1 Section: 2.6.9.1.1

Effective Projected Area of Structural Components for Latticed Structure at Direction of 0°

(EPA) S

15.2

Section: 2.6.9.1.1

Effective Projected Area of Structural Components for Latticed Structure at Direction of 45°

(EPA) S

18.24

Section: 2.6.9.1.1

Effective Projected Area of Structural Components for Latticed Structure at Direction of 60°

(EPA) S

0.8

Section: 2.6.9.1.1

(EPA) S

0.85

Section: 2.6.9.1.1

(EPA) S F ST F ST F ST F ST FA

N/A 0.364735 4.7123762 5.65485144 0.2480198 0.26352104 0.31002475

N/m² N/m² N/m² N/m² N/m² N/m²

Fw Fw Fw Fw

5.02240095 5.96487619 0.55804455 0.57354579

N/m² N/m² N/m² N/m²

Effective Projected Area of Structural Components for Latticed Structure at Direction of ±90° Effective Projected Area of Structural Components for Pole Structure Velocity Pressure Design Wind Force on Structure at Direction of 0° Design Wind Force on Structure at Direction of 45° Design Wind Force on Structure at Direction of 60° Design Wind Force on Structure at Direction of ±90° Design Wind Force on Appurtenances

Kh K zt Kz GH C

qz

Section: 2.6.9.1.2 Section: 2.6.9.5 Section: 2.6.9.6 Section: 2.6.9.6

Section: 2.6.9.2

APPLICABLE FORCES AT SEGMENT Total Design Wind Load at Direction of 0° Total Design Wind Load at Direction of 45° Total Design Wind Load at Direction of 60° Total Design Wind Load at Direction of ±90°

Section: 2.6.9.6 Section: 2.6.9.6 Section: 2.6.9.6 Section: 2.6.9.6

I II III Laticed Structure with Triangular Cross Section Laticed Structure with Square or Rectangular Cross Section Laticed Structure with Other Cross Sections, Appurtenances Tubular Pole Structures Not Applicable Round 8 Sided 12 Sided 16 Sided 18 Sided B C D 1 2 3 4