MEGATRO SQUARE SELF-SUPPORTING LATTICE TELECOM TOWER (MGT-GF-LT65)
MEGATRO is a full service engineering company with a global reputation for delivering excellence and innovation in telecommunications systems.
Over 10 years of experience and innovation in engineering, designing and building towers has evolved MEGATRO into its current form:

1. Full Turn-Key provider including site acquisition, engineering services, manufacturing,   field services-DAS, tech services, value added reseller and monitoring, maintenance and network ownership

2. Specialize in developing supplying and building wireless and wired networks and in-building telecommunications systems, as well as energy infrastructure

3. Single source from Design to System Integration

4. Top quality, ISO 9001 registered

A complete selection of towers including self-support, lattice steel tower, monopoles and guyed towers, form custom-designed radar towers to broadcast towers and energy infrastructure. MEGATRO carries a variety of related products including fall protection, transmission lines, antennas, obstruction lights, and accessories, and other products if client need, MEGATRO also tailored product as per client condition.

MEGATRO mainly design all kinds of towers and posts for:

1. Telecoms

2. Power transmission

3. TV and Radio Broadcast

4. Roads and City Development

Our complete selection of towers includes:

1. Self-supporting

2. Monopoles

3. Guyed towers

4. Custom-designed radar towers

5. Broadcast towers

6. Power transmission

MEGATRO also designs and manufactures tower related products including:

1. Fall protection

2. Antenna brackets

3. Other accessories if needed by clients

This photo refers to our integrated telecom tower and accessories products. They are combined products which we design and fabrication, even source other items for our clients.

Products scope:
1 Telecom tower and antenna mounts
2 Tower foundation plate and anchor bolts
3 Obstruction light (ICAO)
4 Cable tray
5 Shelter room
6 Lightning rod
7 Tower earthing kits and rod
8 ladder for cable and feeder
9 Painting serves
10 Design for tower and foundation
11 Other services as per client
&
 With general technical data as follow:
• Designed for medium to heavy loads
•Designed for primary cellular and MW backbone sites or central    communication hubs
• Lower freight cost due to freight efficiency
• Available with a large variety of accessories that can be easily mounted at any stage
• Enables easy reinforcement of legs at the site
• Modular design to fit a specific site design and enable last-minute modifications

Accessories:
• Working and rest platforms
• Horizontal cable gantries
• Antenna mounts
• Anti-climb guard & other safety devices
• Paint kit (ICAO standards)
• Obstruction lighting system
(ICAO standards)
• Lightning protection kit

Optimal Height:
50 to 120m

Design Standards:
TIA/EIA 222-G, or BS8100, EUROCODE 3 PART 3-1

Materials:
• Legs Q355B, or ASTM A572 GR50, or ST 52-3, or S355JR
• Braces and plates Q235B, or ASTM A36, or S235, Or ST 37-2
 Bolts: Chinese grade 6.8 and 8.8, which similar to ASTM A394

Fabrication
A) Dimension and tolerance for angle are according to GB/T1591-1994, similar to EN 10056-1/2
B) Hot dip galvanization in accordance with GB/T 13912-2002, which similar to ASTM A 123
C) The welding will be performance in accordance with AWS D1.1 or CWB standard

Connections:
Bolts (ISO 8.8, SAE Grade 5, or ASTM
A-325) + flat washers, nuts and spring
washers (5% hardware overage)

Anti-Corrosion Treatment:
All steel elements are hot-dip galvanized (ASTM A123)
Paint kit (white/orange)

Anchoring:
Anchor rods (ASTM F1554) used with
leveling nuts and a positioning template

Ladder:
• Caged or open ladder with Safety climbing line or rail
• Usually installed inside the tower
• Option for attachment to any tower face
• Vertical cable hangers
Shipment:
Standard 20' to 40' ISO container
Documentation:
• Detailed packing list
• Installation & maintenance
manual
• Foundation design

For this SQUARE SELF-SUPPORTING LATTICE TELECOM TOWER (MGT-GF-LT65),  
1 Material Specifications:
Mild Steel
The mild steel according to BS EN 10025 grade S235J0 or Equiv. with the following
Mechanical properties:
Min. yield strength in N/mm2          =235 for thickness<=16mm
=225 for thickness >16&<40mm
Min tensile strength in N/mm2=340  for thickness>3 & <100mm
The mild steel according to BS EN 10025 grade S275J0 or Equiv. with the following
Mechanical properties:
Min.yield strength in N/mm2   =275 for thickness<=16mm
Min tensile strength in N/mm2  =430 for thickness>3&<100m

High Tensile Steel
 High tensile steel according to BS EN 10025 grade S355J0 or Equiv. With the following
mechanical properties:
Min. yield strength in N/mm2    =355 for thickness<=16mm
=345 for thickness > 16& <40   mm 
= 335 for   thickness > 40   & < 63   mm
Min tensile strength in N/mm2    = 490 for   thickness > 3     & < 100 mm

Bolts
The bolts are according to ASTM A325 or DIN 267 Grade 8.8 or equivalent with the following
mechanical properties:
Min Yield strength  = 640 N/mm2 
Min Tensile strength = 800 N/mm2

2 Design standards
ANSI/TIA-222-G
AISC LRFD
ASCE 7-0
Or equivalent standard design codes

3 wind loads characteristics
Basic Design Wind Speed (3 Second Gust)   160 km/hr 
operational Wind Speed (3 Second Gust)      120 km/hr
Maximum allowable title & twist              0.50  DEG  at 120 Km/hr.
Site Exposure Category                        C
Structure Class                                 II 
Topographic Category                           1 
Datum for wind speed                       10.0m above ground.
Building Height                                35.0 m for any RT Structure
The steel should be galvanized of at least 85 micron coat thickness.

4 Slenderness Ratio Limits:
The maximum allowable slenderness ratio (L/R) for various types of members shall not
exceed the following values:
main members (legs)     150
bracing & main horizontals 200
redundant               250
tension only members     300

5 antenna and RRU dimensions
Antenna 12 ports single beam     2688*600*200mm/60kg
RRU                           500*400*200mm/30kg

6 Design loads for this type GF-LT Self-supporting tower
4×antennas 12 ports at top level
5×RRU's for each sector "Behind antenna"
4×MWD's 1.8m at level top-4m
4×MWD's 1.8m at level top-6m
4×MWD's 1.8m at level top-8m
4×MWD's 1.8m at level top-10m
Feed lines 2×7/8"for each sector & 1×1/2" for each MWD


Our MEGATRO performs in-house design activities by PLS software or other software. Our Engineering Department is boasting of highly qualified engineering who are conversant with international codes and standards. The work is carried out with extensive use of CAE/CAD via a large of computer network. The computer hardware & drafting software are liked to the CNC workshop equipment for downloading of information thereby eliminating error and saving valuable production time.

After fabrication all towers are delivered to the galvanizing facility to be Hot Dip Galvanized. Towers are processed through the facility by Caustic Cleaning, Pickling, and then Fluxing. These strict procedures insure years of maintenance free towers.

Moreover, we offer cost effective range of development and installation service regarding as an additional installation service. These are further, designed for both government and civil communications and suitable for both far-off and short distance communications. For additional protection, we cover these with protective shield to prevent the radioactive fallouts.

Other information:
Availability size: Based on the customer's requirements.
Material: Chinese material or as per clients requirement
Package: Both parties discuss before delivery
Port of Loading: Qingdao Port
Lead Time: One month or based on the customer's needs
Minimum order: 1 set
Fabrication standard: Chinese Standard or other standard which client accepted



APPLICABLE STANDARD AND CODES
All towers manufactured and design shall be generally in accordance with latest revision of the following standards except where specifically directed otherwise.
General
IEC 60050 (151)                         International Electro-technical Vocabulary
                                       Part 51 Electrical and Magnetic Devices
IEC 60050 (601)                      Chapter 601: Generation, transmission and distribution of electricity-General
IEC 60050 (601)                    Chapter 601: Generation, transmission and distribution of electricity-Operation
IEC 60059                              IEC standard current ratings
Chinese Standard

American Standards:

DIN VDE 0101                       -  Isokeraunic Level
VDE 0201                              - Climatic and environmental   conditions
CVDE 0210                           -  Minimum safety factors under    simultaneous working loads
ISO R898 Mechanical Properties of Fasteners
BS EN ISO 1461:1991 - High dip galvanized coatings on fabricated iron and steel articles. Specifications and standards
A) BS 5950: Welding Terms And Symbols
B) BS 729: Hot - Dip Galvanised Coating On Iron And Steel Articles
C) BS 2901: Filler Rods And Wires For Gas Shielded Arc Welding: Part 1 Ferritic Steels
D) BS 3692: ISO Metric Precision Hexagon Bolts, Screws And Nuts
E) BS 4360: Weldable Structural Steel
F ) BS 5135: Metal - Arc Welding Of Carbon And Carbon Manganese Steel
G) BS 5950: Part 1: Code Of Practice For Loading Latticed Tower & Masts
Part 2: Guide To The Background And Use Of Part 1"Code OF Practice For Loading"
Part 3: Strength Assessment of Members
H) DD 133 (1986): Code Of Practice For Loading Latticed Tower & Masts
I) BS 4592 (1987): Part 2: Specification For Expanded Metal Grating Panels
J) BS 4592 (1977): Code Of Practice For Protective Coating Of Iron And Steel Structure Against Corrosion
K) BS 4190: Bracing & Flanged Bolts
L) BS 4190: Rolled Steel sections, Flats & Plates

If any special requirement, we can design and discuss with client.