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Design of monopole Tower

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ZND090-AMT-Td-0001 Rev. A FAST PLANETS Co LTD., ENGINEERING DEPARTMENT P.0. BOX : 34620 RIYADH - 11478 ANALYSIS / COMPARATIVE STUDY OF EXISTING 25+4.0m Extended Latticed MONOPOLE TOWER (LTE Project 2011) Main Site No.: ZND090 ORIGINAL DESIGN LOAD + EXISTING & PROPOSED LOADING CONDITION
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Page 1: Design of monopole Tower

ZND090-AMT-Td-0001 Rev. A

FAST PLANETS Co LTD.,ENGINEERING DEPARTMENT

P.0. BOX : 34620RIYADH - 11478

ANALYSIS / COMPARATIVE STUDYOF EXISTING

25+4.0m Extended Latticed MONOPOLE TOWER(LTE Project 2011)

Main Site No.: ZND090ORIGINAL DESIGN LOAD + EXISTING & PROPOSED LOADING CONDITION

Page 2: Design of monopole Tower

Page 2 of 11

LTE Project 2011 ZND090-AMT-Td-0001 Rev.A

TABLE OF CONTENTS

TITLE PAGE NO.

COVER PAGE 1

TABLE OF CONTENTS 2

INTRODUCTION 3

CONCLUSION 3

TOWER COMPARATIVE STUDY 4

TABLE I - WIND LOAD ON ANTENNA SUPPORT PIPE 6 AND OTHER MOUNTED POLE STRUCTURE

TABLE II - STANDARD 25m SELF-SUPPORT MONOPOLE WIND LOAD 7

TOWER DEFLECTION 8

TOWER INFORMATION 9

ATTACHMENT

ORIGINAL TOWER LOAD DESIGN CALCULATIONTOWER PROFILE

Analyzed by: Checked by: Approved by:

J.B.Vasquez J.A.Hasson A.A.AleemTelecom Engineer Structural Engineer Projects Manager

Page 3: Design of monopole Tower

Page 3 of 11

LTE Project 2011 ZND090-AMT-Td-0001 Rev.A

Main Site No. ZND090

Tower load comparative study for main site no. ZND090 was performed to compare the design load against the actual load to determine its feasibility to support the existing and the proposed new antenna loading to be used for LTE Project 2011.

Refer to pages 4 to 7 for the detailed comparative study of the tower original design loading and actual loading. Tower existing loading condition and proposed new antennas and tower physical condition and other relevant information are tabulated on pages 9 to 11. For information on tower mast geometry and member sizes, see attachment.

INTRODUCTION

The results show that the tower meet the criteria of 39 m/s (140KPH) basic wind speed. The original design load of the tower is greater than the present actual load and it is indicative that there is no increase in antenna loads. Hence, we can conclude that the tower can safely support the existing and the proposed microwave antenna loading for LTE Project 2011.

CONCLUSION

Page 4: Design of monopole Tower

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LTE Project 2011 ZND090-AMT-Td-0001 Rev.A

Comparison between original design loads and actual loads for standard 25.0m Monopole tower

Tower height = 25 m

1.690

Original Design Loads

Wind speed = 39 m/s

Design Loads Size Dept Qty, n Elevation Kz Fa Fa*Gh*Kz*n Base Moment

(m) (m) (kN) (kN) (kN-m)

PANEL 900 MHZ GSM 9 25.0 1.299 0.89 17.51 437.64

HP 1.20 DIA MW 2 25.0 1.299 1.39 6.10 152.57

HP 2.40 DIA MW 1 25.0 1.299 5.56 12.21 305.15

Tubular Poles 1 25.0 m high GSM LS N/A 4 1.000 N/A 4 N/A 4 4636.41

Mounted Poles 2 2.0 m high GSM LS N/A 4 1.000 N/A 4 N/A 4 2.86

Cantilevered Lattice 3 4.0 m high GSM LS N/A 4 1.000 N/A 4 N/A 4 137.89

Total Base Moment = 5672.52

1 25.0m high Monopole Tubular Pole

2 2.0 m high Mounted Pole

3 4.0m high Cantileverd Lattice

Gh =

4 Previously gusted (i.e. KZ and Gh equal to 1.0), see Tables I, II & III

Page 5: Design of monopole Tower

Page 5 of 11

LTE Project 2011 ZND090-AMT-Td-0001 Rev.AActual Loads

Wind speed = 35 m/s 1.69Actual Loads Size Dept Qty, n Elevation Kz Fa Fa*Gh*Kz*nBase Moment

(m) (m) (kN) (kN) (kN-m)LR 0.20 Ø x 2.0m GSM 1 30 1.3687 0.016 0.04 1.08

PANEL 900 MHZ GSM 3 29 1.3555 0.713 4.90 142.10

HP 0.30 DIA. MW 4 28 1.3420 0.120 1.09 30.48

PANEL 1800 MHZ GSM 1 26 1.3139 0.534 1.19 30.83

HP 0.30 DIA. MW 1 24 1.2842 0.120 0.26 6.25

PANEL 900 MHZ GSM 1 25 1.2992 0.713 1.57 39.14

3G 2100 MHZ GSM 1 25 1.2992 0.538 1.18 29.53

HP 0.30 DIA. MW 1 24 1.2842 0.120 0.26 6.25

HP 0.60 DIA. MW 1 23 1.2687 0.350 0.75 17.26

HP 0.30 DIA. MW 1 23 1.2687 0.120 0.26 5.92

HP 0.30 DIA. MW 2 22.5 1.2607 0.120 0.51 11.51

HP 0.30 DIA. MW 1 23 1.2687 0.120 0.26 5.92

NEW LTE 1 GSM 3 26.00 1.314 0.538 3.58 93.18

Tubular Poles 25.0m high GSM LS N/A 2 1.000 N/A 2 N/A 2 3734.14Mounted Poles 2.0M high GSM LS N/A 2 1.000 N/A 2 N/A 2 2.26

Cantilevered Lattice 4.0m high GSM LS N/A 2 1.000 N/A 2 N/A 2 111.26

Total Base Moment = 4267.11% Comparison of original design loads versus actual loads = 0.7522

Conclusion : Since there is no increase in antenna loads, therefore the tower can safely support the existing plus the proposed new loading.

GH =

1 New GSM antenna2 Previously gusted (i.e. KZ and Gh equal to 1.0), see Tables I & II

Page 6: Design of monopole Tower

LTE Project 2011 ZND090-AMT-Td-0001 Rev.A

Table I - Wind load on antenna support pipe and other mounted pole & latticed structures.

Tower ht. = 25 m

Wind speed = 39 m/s

1.5625 Sec.2.3.4.1 of TIA-EIA-222-F

Actual Loads Size Dept Length, lDiameter, dAppurtenance Kz Pressure C

(mm) (mm) c/l Elev., (m) (C<4.40) (kN/m)

LR 20ømmx2.0m GSM 2000 20.0 29.80 1.366 1.274 0.912 1.200 0.048

Table I - Wind load on antenna support pipe and other mounted pole structures.

Tower ht. = 25 m

Wind speed = 35 m/s

1.5625 Sec.2.3.4.1 of TIA-EIA-222-F

Actual Loads Size Dept Length, lDiameter, dAppurtenance Kz Pressure C

(mm) (mm) c/l Elev., (m) (C<4.40) (kN/m)

LR 20ømmx2.0m GSM 2000 20.0 29.80 1.365 1.025 0.818 1.200 0.038

Gh1 = 1.00 </=GH</=1.25

CF Force, Fc

qz (kPa)

1 multiplied by 1.25, to compensate for the greater gust response for mounted pole structure (EIA/TIA-222-E, Sec. 2.3.4.4)

Gh1 = 1.00 </=GH</=1.25

CF Force, Fc

qz (kPa)

1 multiplied by 1.25, to compensate for the greater gust response for mounted pole structure (EIA/TIA-222-E, Sec. 2.3.4.4)

Page 7: Design of monopole Tower

Table I - Wind load on antenna support pipe and other mounted pole & latticed structures.

Force, Fc

Force, Fc

Page 8: Design of monopole Tower

Page 7 of 11

LTE Project 2011 ZND090-AMT-Td-0001 Rev.A

Total Base Moment = 1042.59

Page 9: Design of monopole Tower

LTE Project 2011 ZND090-AMT-Td-0001 Rev.A

TABLE II - 25.0M SELF-SUPPORTING MONOPOLE TOWERTypical tower wind load distribution as per section in normal to the tower face.

H = 25 m Heightof MonopoleV = 39 m/s Basic Design Wind speed for the structure

1.69 Gust Response of Monopole as per Section 2.3.4.2 of TIA-EIA_222-F

SECTION OTM(kN-m)1 9.567 9.854 18456.99 130.95 20.482 2682.122 10.719 11.041 17668.57 140.46 11.520 1618.103 9.121 9.395 14372.05 97.22 3.458 336.187

Total = 4636.41 kN-m

TABLE II - 25.0M SELF-SUPPORTING MONOPOLE TOWER

Typical tower wind load distribution as per section in normal to the tower face.

H = 25 m Heightof MonopoleV = 35 m/s Basic Design Wind speed for the structure

1.69 Gust Response of Monopole as per Section 2.3.4.2 of TIA-EIA_222-F

SECTION OTM(kN-m)1 9.567 9.854 14865.10 105.47 20.482 2160.242 10.719 11.041 14230.11 113.12 11.520 1303.143 9.121 9.395 11575.13 78.30 3.458 270.761

Total = 3734.14 kN-m

GH =

AG(sq.m.) AR(sq.m.) GH*qZ*AGF=qz*GH*CF*AR(kNs)zequivalent(m)

GH =

AG(sq.m.) AR(sq.m.) GH*qZ*AGF=qz*GH*CF*AR(kNs)zequivalent(m)

Page 10: Design of monopole Tower

ZND090-AMT-Td-0001 Rev.A

Page 11: Design of monopole Tower

Page 8 of 11

LTE Project 2011 ZND090-AMT-Td-0001 Rev.A

TOWER DEFLECTION

As per original design loads:

ELEV. 45 m/s WIND SPEED 33 m/s WIND SPEED

(m) DEFLECTION (mm)ROTATION (deg) DEFLECTION (mm) ROTATION (deg) ALLOW. TILT/SWAY (deg)

36.00 79.70 0.24 44.00 0.13 0.50

The above shown tower deflection is based on the original design loads (attached); considering that the existing + proposed antenna loads are less than the original design loads, thus actual tower deflection will be lesser than the deflection due to original design loads.

Page 12: Design of monopole Tower

Page 9 of 11

LTE Project 2011 ZND090-AMT-Td-0001 Rev.A

The following two tables include existing tower loading, proposed loading, physical condition of the steel tower and foundation and other relevant information.

TOWER SITE INFORMATION

Page 13: Design of monopole Tower

Page 10 of 11

LTE Project 201 ZND090-AMT-Td-0001 Rev.A

Site Survey Report - Tower Antenna Loads

Date:22/05/2009

Site 306-00-000

ANTENNA LOADING DATA FEEDLINES/ LADDER DATA

No. TYPE SIZE ELEV. AZIM. F/L QTY SIZE TYPE REMARKS

(meter)(meter) (deg.) (mm)

NOTES

ANTENNA DATA:No. Assign a number to each antenna, starting at top of tower and working down.

TYPE Paraboloid (Dish): S- Solid, G- Grid, HP- High Performance (Flat Shielded), R- with RadomeT.V.- UHF, BC- Broadcast, Y- Yagi, D- Directional (cellular), O- Omnidirectional, P- PagingReflectors: CHR- Conical Horn Reflector, FPR- Flat Plate Passive Reflectors.G.S.M.: A- ALLGON, ADC- ADC Dual Polarized.MISC.: S/S- Self Supporting Tower, G/T- Guyed Tower, P/M- Pole Mount.

SIZE: Indicate diameter in meters for parabolic (microwave dishes), size for other types.ELEV. Height above ground in meters (Elevation).AZIM. Azimuth: Show antenna orientation in degrees or compass reading (N, NE, E,SE, S, etc.).F/L Indicate antenna mount: Face (F) or leg (L).REMARKS Existing or proposed new antenna(s) designation.

FEEDLINES/ LADDER DATA COMMENTS

QTY: Quantity.

SIZE: Diameter or size in (mm).

TYPE: W- Waveguide, C- Coax, H- Heliax, L- Ladder.

Page 14: Design of monopole Tower

Page 10A of 11

LTE Project 201 ZND090-AMT-Td-0001 Rev.A

Site Survey Report - Tower Antenna Loads

Date:22/05/2009

Site 306-00-000

ANTENNA LOADING DATA FEEDLINES/ LADDER DATA

No. TYPE SIZE ELEV. AZIM. F/L QTY SIZE TYPE REMARKS

(meter)(meter) (deg.) (mm)

NOTES

ANTENNA DATA:No. Assign a number to each antenna, starting at top of tower and working down.

TYPE Paraboloid (Dish): S- Solid, G- Grid, HP- High Performance (Flat Shielded), R- with RadomeT.V.- UHF, BC- Broadcast, Y- Yagi, D- Directional (cellular), O- Omnidirectional, P- PagingReflectors: CHR- Conical Horn Reflector, FPR- Flat Plate Passive Reflectors.G.S.M.: A- ALLGON, ADC- ADC Dual Polarized.MISC.: S/S- Self Supporting Tower, G/T- Guyed Tower, P/M- Pole Mount.

SIZE: Indicate diameter in meters for parabolic (microwave dishes), size for other types.ELEV. Height above ground in meters (Elevation).AZIM. Azimuth: Show antenna orientation in degrees or compass reading (N, NE, E,SE, S, etc.).F/L Indicate antenna mount: Face (F) or leg (L).REMARKS Existing or proposed new antenna(s) designation.

FEEDLINES/ LADDER DATA COMMENTS

QTY: Quantity.

SIZE: Diameter or size in (mm).

TYPE: W- Waveguide, C- Coax, H- Heliax, L- Ladder.

Page 15: Design of monopole Tower

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LTE Project 2011 ZND090-AMT-Td-0001 Rev.A

TOWER INSPECTION CHECKLIST

Existing Tower Light x Medium Heavy None

Tower Type Tower Cross-Section Tower Membersx Self Supporting Triangular Tubular AngleSolid Rd

Guyed Mast x Rectangula Legs xMonopole Diagonals x

Struts xTower Conditions:

Guy Wires Structural

x Good, no visible rust or kinks, straight members Yes NoAverage, some surface rust, no other damage x Ladder ExistsBelow Average, rusty, needs maintenance x Enclosed LadderPoor, severe rust, bent/ missing members, bolts or stra x PaintedLoose or corroded bolts or anchor bolts or Guy HardwarSagging Guy wires, Tower Out of Plumbness or Twisted

Foundation Type Condition Cement GroutPiers x Good, no visible cracks or damage x Good

x Raft Average, edges rough, no cracks, edge wear FairPiles Below Average, surface cracks, edge wear Poor, missingRoof Mount Poor cracks, spalding, deterioratingOthers

x

Comments :

Tower Manufacturer Al Babtain Le Blanc Model 36.0 M

Tower Base outside width 6.70 m Anchor Bolt Size 25 dia. mmBasePlate Thickness 4.0 cm

BasePlate dimensions 40x40 cm

Red/White, No. of bands 7

Pedestal Size 70 x 70 cm Guy Anchor Size N/A . Distance from tower to anchor block N/A


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