WIND FORCE ON GUYED TOWER
EMMANUEL A. VISTA
JOHN CARLO C. INDICO
MARK KEVIN C. LANUZO
Square Cross Section with Normal Wind Direction
 Occupancy Category – Category I (essential facilities)
 Structure Classification – Class III
 Importance Factor, I – 1.15
 Basic Wind Speed on Structure, Vst = 320 kph or 88.89 m/s
 Basic Wind Speed in Service, Vsv = 65.53 m/s
 Wind Directionality Factor, kd = 0.85
 Topographic Factor, Kzt = 1.00
 Gust Effect Factor = 0.85
PANEL 1 - 9
LEG
SP-02
DIAGONAL
2L 50mm x 50mm x 5mm
HORIZONTAL
L 50mm x 50mm x 5mm
Exposure Category C
= 9.5
Zg = 274.32
PANEL 1
𝐴𝑔 = L X W
=
𝑅𝑟 = 0.36 + 0.26
𝐴𝑓 + 𝐴𝑟
2
- 5.9
𝑘𝑧 =
+ 4.0
𝑞𝑧 = 0.613 𝑘𝑧 𝑘𝑧𝑡 𝑘𝑑 𝑉𝑠𝑣 2 I
𝐴𝑔
2
𝑧
2.01 ( ) α
𝑧𝑔
𝐹𝑠𝑡 = 𝑞𝑧 𝐺ℎ (𝐸𝑃𝐴)𝑆
4.17
0.20
Component
Length
Width
Leg
5.2
0.0603
Diagonal
7.35
0.05
0.3675
Horizontal
3.21
0.05
0.1605
Total
Af (m^2)
Ar (m^2)
0.31356
0.528
0.31356
2
- 0.6
3
(𝐸𝑃𝐴)𝑆 = 𝐶𝑓 [ 𝐷𝑓 Σ 𝐴𝑓 + 𝐷𝑟 Σ (𝐴𝑟 𝐷𝑟 ) ]
𝐴𝑔
𝐶𝑓 = 4.0
+ 0.97
𝐶𝑓
2.98
𝐷𝑓
1.00
𝐷𝑟
1.00
𝑅𝑟
0.44576
(𝐸𝑃𝐴)𝑆
1.9900
𝑘𝑧
0.7538
𝑞𝑧
1.940
𝑭𝒔𝒕
3.2815
PANEL 2
𝐴𝑔 = L X W
=
𝑅𝑟 = 0.36 + 0.26
𝐴𝑓 + 𝐴𝑟
2
- 5.9
𝑘𝑧 =
+ 4.0
𝑞𝑧 = 0.613 𝑘𝑧 𝑘𝑧𝑡 𝑘𝑑 𝑉𝑠𝑣 2 I
𝐴𝑔
2
𝑧
2.01 ( ) α > 0.85
𝑧𝑔
𝐹𝑠𝑡 = 𝑞𝑧 𝐺ℎ (𝐸𝑃𝐴)𝑆
4.17
0.20
Component
Length
Width
Leg
5.2
0.0603
Diagonal
7.35
0.05
0.3675
Horizontal
3.21
0.05
0.1605
Total
Af (m^2)
Ar (m^2)
0.31356
0.528
0.31356
2
- 0.6
3
(𝐸𝑃𝐴)𝑆 = 𝐶𝑓 [ 𝐷𝑓 Σ 𝐴𝑓 + 𝐷𝑟 Σ (𝐴𝑟 𝐷𝑟 ) ]
𝐴𝑔
𝐶𝑓 = 4.0
+ 0.97
𝐶𝑓
2.98
𝐷𝑓
1.00
𝐷𝑟
1.00
𝑅𝑟
0.44576
(𝐸𝑃𝐴)𝑆
1.9900
𝑘𝑧
0.8722
𝑞𝑧
2.244
𝑭𝒔𝒕
3.7957
PANEL 3
𝐴𝑔 = L X W
=
𝑅𝑟 = 0.36 + 0.26
𝐴𝑓 + 𝐴𝑟
𝐶𝑓 = 4.0
- 5.9
𝑘𝑧 =
+ 4.0
2
𝑧
2.01 ( ) α > 0.85
𝑧𝑔
𝑞𝑧 = 0.613 𝑘𝑧 𝑘𝑧𝑡 𝑘𝑑 𝑉𝑠𝑣 2 I
𝐹𝑠𝑡 = 𝑞𝑧 𝐺ℎ (𝐸𝑃𝐴)𝑆
𝐹𝑔 = 𝐶𝑑 𝑑𝐿𝑔 𝐺ℎ 𝑞𝑧 𝑠𝑖𝑛2 Ɵ
𝐹𝑤 = 𝐹𝑠𝑡 + 𝐹𝑔
𝐴𝑔
4.17
0.20
Ar (m^2)
𝐶𝑓
2.98
𝐷𝑓
1.00
𝐷𝑟
1.00
𝑅𝑟
0.44576
(𝐸𝑃𝐴)𝑆
1.9900
𝑘𝑧
0.9499
Component
Length
Width
Leg
5.2
0.0603
Diagonal
7.35
0.05
0.3675
𝑞𝑧
2.444
Horizontal
3.21
0.05
0.1605
𝐹𝑠𝑡
4.1340
𝐹𝑔
0.3857
𝑭𝒘
4.5197
Total
Af (m^2)
0.31356
0.528
0.31356
2
- 0.6
3
(𝐸𝑃𝐴)𝑆 = 𝐶𝑓 [ 𝐷𝑓 Σ 𝐴𝑓 + 𝐷𝑟 Σ (𝐴𝑟 𝐷𝑟 ) ]
𝐴𝑔
2
+ 0.97
PANEL 4
𝐴𝑔 = L X W
=
𝑅𝑟 = 0.36 + 0.26
𝐴𝑓 + 𝐴𝑟
2
- 5.9
𝑘𝑧 =
+ 4.0
𝑞𝑧 = 0.613 𝑘𝑧 𝑘𝑧𝑡 𝑘𝑑 𝑉𝑠𝑣 2 I
𝐴𝑔
2
𝑧
2.01 ( ) α > 0.85
𝑧𝑔
𝐹𝑠𝑡 = 𝑞𝑧 𝐺ℎ (𝐸𝑃𝐴)𝑆
4.17
0.20
Component
Length
Width
Leg
5.2
0.0603
Diagonal
7.35
0.05
0.3675
Horizontal
3.21
0.05
0.1605
Total
Af (m^2)
Ar (m^2)
0.31356
0.528
0.31356
2
- 0.6
3
(𝐸𝑃𝐴)𝑆 = 𝐶𝑓 [ 𝐷𝑓 Σ 𝐴𝑓 + 𝐷𝑟 Σ (𝐴𝑟 𝐷𝑟 ) ]
𝐴𝑔
𝐶𝑓 = 4.0
+ 0.97
𝐶𝑓
2.98
𝐷𝑓
1.00
𝐷𝑟
1.00
𝑅𝑟
0.44576
(𝐸𝑃𝐴)𝑆
1.9900
𝑘𝑧
1.0092
𝑞𝑧
2.5968
𝑭𝒔𝒕
4.3925
PANEL 5
𝐴𝑔 = L X W
=
𝑅𝑟 = 0.36 + 0.26
𝐴𝑓 + 𝐴𝑟
2
- 5.9
𝑘𝑧 =
+ 4.0
𝑞𝑧 = 0.613 𝑘𝑧 𝑘𝑧𝑡 𝑘𝑑 𝑉𝑠𝑣 2 I
𝐴𝑔
2
𝑧
2.01 ( ) α > 0.85
𝑧𝑔
𝐹𝑠𝑡 = 𝑞𝑧 𝐺ℎ (𝐸𝑃𝐴)𝑆
4.17
0.20
Component
Length
Width
Leg
5.2
0.0603
Diagonal
7.35
0.05
0.3675
Horizontal
3.21
0.05
0.1605
Total
Af (m^2)
Ar (m^2)
0.31356
0.528
0.31356
2
- 0.6
3
(𝐸𝑃𝐴)𝑆 = 𝐶𝑓 [ 𝐷𝑓 Σ 𝐴𝑓 + 𝐷𝑟 Σ (𝐴𝑟 𝐷𝑟 ) ]
𝐴𝑔
𝐶𝑓 = 4.0
+ 0.97
𝐶𝑓
2.98
𝐷𝑓
1.00
𝐷𝑟
1.00
𝑅𝑟
0.44576
(𝐸𝑃𝐴)𝑆
1.9900
𝑘𝑧
1.0578
𝑞𝑧
2.7218
𝑭𝒔𝒕
4.6039
PANEL 6
𝐴𝑔 = L X W
=
𝑅𝑟 = 0.36 + 0.26
𝐴𝑓 + 𝐴𝑟
2
- 5.9
𝑘𝑧 =
+ 4.0
𝑞𝑧 = 0.613 𝑘𝑧 𝑘𝑧𝑡 𝑘𝑑 𝑉𝑠𝑣 2 I
𝐴𝑔
2
𝑧
2.01 ( ) α > 0.85
𝑧𝑔
𝐹𝑠𝑡 = 𝑞𝑧 𝐺ℎ (𝐸𝑃𝐴)𝑆
4.17
0.20
Component
Length
Width
Leg
5.2
0.0603
Diagonal
7.35
0.05
0.3675
Horizontal
3.21
0.05
0.1605
Total
Af (m^2)
Ar (m^2)
0.31356
0.528
0.31356
2
- 0.6
3
(𝐸𝑃𝐴)𝑆 = 𝐶𝑓 [ 𝐷𝑓 Σ 𝐴𝑓 + 𝐷𝑟 Σ (𝐴𝑟 𝐷𝑟 ) ]
𝐴𝑔
𝐶𝑓 = 4.0
+ 0.97
𝐶𝑓
2.98
𝐷𝑓
1.00
𝐷𝑟
1.00
𝑅𝑟
0.44576
(𝐸𝑃𝐴)𝑆
1.9900
𝑘𝑧
1.0992
𝑞𝑧
2.8284
𝑭𝒔𝒕
4.7842
PANEL 7
𝐴𝑔 = L X W
=
𝑅𝑟 = 0.36 + 0.26
𝐴𝑓 + 𝐴𝑟
𝐶𝑓 = 4.0
- 5.9
𝑘𝑧 =
+ 4.0
2
𝑧
2.01 ( ) α > 0.85
𝑧𝑔
𝑞𝑧 = 0.613 𝑘𝑧 𝑘𝑧𝑡 𝑘𝑑 𝑉𝑠𝑣 2 I
𝐹𝑠𝑡 = 𝑞𝑧 𝐺ℎ (𝐸𝑃𝐴)𝑆
𝐹𝑔 = 𝐶𝑑 𝑑𝐿𝑔 𝐺ℎ 𝑞𝑧 𝑠𝑖𝑛2 Ɵ
𝐹𝑤 = 𝐹𝑠𝑡 + 𝐹𝑔
𝐴𝑔
4.17
0.20
Ar (m^2)
𝐶𝑓
2.98
𝐷𝑓
1.00
𝐷𝑟
1.00
𝑅𝑟
0.44576
(𝐸𝑃𝐴)𝑆
1.9900
𝑘𝑧
1.1354
Component
Length
Width
Leg
5.2
0.0603
Diagonal
7.35
0.05
0.3675
𝑞𝑧
2.9215
Horizontal
3.21
0.05
0.1605
𝐹𝑠𝑡
4.9417
𝐹𝑔
1.2943
𝑭𝒘
6.236
Total
Af (m^2)
0.31356
0.528
0.31356
2
- 0.6
3
(𝐸𝑃𝐴)𝑆 = 𝐶𝑓 [ 𝐷𝑓 Σ 𝐴𝑓 + 𝐷𝑟 Σ (𝐴𝑟 𝐷𝑟 ) ]
𝐴𝑔
2
+ 0.97
PANEL 8
𝐴𝑔 = L X W
=
𝑅𝑟 = 0.36 + 0.26
𝐴𝑓 + 𝐴𝑟
2
- 5.9
𝑘𝑧 =
+ 4.0
𝑞𝑧 = 0.613 𝑘𝑧 𝑘𝑧𝑡 𝑘𝑑 𝑉𝑠𝑣 2 I
𝐴𝑔
2
𝑧
2.01 ( ) α > 0.85
𝑧𝑔
𝐹𝑠𝑡 = 𝑞𝑧 𝐺ℎ (𝐸𝑃𝐴)𝑆
4.17
0.20
Component
Length
Width
Leg
5.2
0.0603
Diagonal
7.35
0.05
0.3675
Horizontal
3.21
0.05
0.1605
Total
Af (m^2)
Ar (m^2)
0.31356
0.528
0.31356
2
- 0.6
3
(𝐸𝑃𝐴)𝑆 = 𝐶𝑓 [ 𝐷𝑓 Σ 𝐴𝑓 + 𝐷𝑟 Σ (𝐴𝑟 𝐷𝑟 ) ]
𝐴𝑔
𝐶𝑓 = 4.0
+ 0.97
𝐶𝑓
2.98
𝐷𝑓
1.00
𝐷𝑟
1.00
𝑅𝑟
0.44576
(𝐸𝑃𝐴)𝑆
1.9900
𝑘𝑧
1.1678
𝑞𝑧
3.0049
𝑭𝒔𝒕
5.0828
PANEL 9
𝐴𝑔 = L X W
=
𝑅𝑟 = 0.36 + 0.26
𝐴𝑓 + 𝐴𝑟
𝐶𝑓 = 4.0
- 5.9
𝑘𝑧 =
+ 4.0
2
𝑧
2.01 ( ) α > 0.85
𝑧𝑔
𝑞𝑧 = 0.613 𝑘𝑧 𝑘𝑧𝑡 𝑘𝑑 𝑉𝑠𝑣 2 I
𝐹𝑠𝑡 = 𝑞𝑧 𝐺ℎ (𝐸𝑃𝐴)𝑆
𝐹𝑔 = 𝐶𝑑 𝑑𝐿𝑔 𝐺ℎ 𝑞𝑧 𝑠𝑖𝑛2 Ɵ
𝐹𝑤 = 𝐹𝑠𝑡 + 𝐹𝑔
𝐴𝑔
4.17
0.20
Ar (m^2)
𝐶𝑓
2.98
𝐷𝑓
1.00
𝐷𝑟
1.00
𝑅𝑟
0.44576
(𝐸𝑃𝐴)𝑆
1.9900
𝑘𝑧
1.1971
Component
Length
Width
Leg
5.2
0.0603
Diagonal
7.35
0.05
0.3675
𝑞𝑧
3.0803
Horizontal
3.21
0.05
0.1605
𝐹𝑠𝑡
5.2103
𝐹𝑔
2.4775
𝑭𝒘
7.6878
Total
Af (m^2)
0.31356
0.528
0.31356
2
- 0.6
3
(𝐸𝑃𝐴)𝑆 = 𝐶𝑓 [ 𝐷𝑓 Σ 𝐴𝑓 + 𝐷𝑟 Σ (𝐴𝑟 𝐷𝑟 ) ]
𝐴𝑔
2
+ 0.97
TOTAL DESIGN WIND FORCE ON GUYED TOWER
𝐹𝑊 = 𝐹𝑊1 + 𝐹𝑊2 + 𝐹𝑊3 + 𝐹𝑊4 + 𝐹𝑊5 + 𝐹𝑊6 + 𝐹𝑊7 + 𝐹𝑊8 + 𝐹𝑊9
𝐹𝑊 = 3.2815 + 3.7957 + 4.5197 + 4.3925 + 4.6039 + 4.7842 + 6.236 + 5.0828 + 7.6878
𝐹𝑊 = 44.3841 KN