MEGATRO Simple Signal Mobile steel tower
MEGATRO provides customized communication mobile towers in every phase of project realization and ensures that high quality work is carried out on schedule and at low cost. We offer comprehensive solutions to match the special requirements of each organization, aiming for absolute customer satisfaction. All our communication mobile towers are marked by quality construction and superior strength, and are suitable for a wide range of demanding applications in communication infrastructure.
MEGATRO provide every type of lattice steel tower & mast for communication mobile application. These towers are, typically, tall structures designed to support telecom accessories with antennas (also known as aerials) for telecommunications and broadcasting, including television, antenna and other supports, which also can accommodate a variety of disc with network parts. MEGATRO also offers a wide variety of accessories and mounts.
We are licenced and fully
insured to undertake still and video assignments using small, battery powered RPAS (Remotely Piloted Aircraft System) quadcopters fitted with an integral 4K video camera with the ability to take high quality stills in both RAW and JPEG.
Using experience already gained in working with estate agents and developers, we are able to offer the option of flexible video and still photography using the quad, in addition to stable, high quality images from the masthead system .
DESTINATION
In 2007 we developed a simple system for producing quality images taken with a remote controlled camera mounted on a 50′ telescopic mast. This system is often used in situations where the RPAS is not viable due to adverse weather conditions, or where deployment would contravene CAA regulations.
This low level aerial photography, using the latest software & equipment, is an ideal and cost effective solution for estate agents, property developers, health & safety surveyors, and building inspectors who need images of sites and buildings which would otherwise require the use of expensive scaffolding or aircraft.
The masts are generally mounted on 4×4 vehicles, making access to off-road sites much easier; they can also be used 'free-standing', using guy wires for stability, when vehicle access is not an option.
The system can be erected, operated and dismantled by one person in little over an hour, with the images supplied on CD at the end of the process.
Among our various clients, we count festival organisers, local newspapers and private individuals, all of whom require a different 'viewpoint' to that provided by ground based equipment.
With our high magnification capability, we are able to supply detailed, close-up assessment shots of roofs, gutters and chimneys in hard to reach places without the inconvenience and expense of erecting scaffolding.
We offer high power projections for product launches, promotions & events, - inside or out - from single colour logos of any size to full colour photographs, video projection and 3D mapping solutions.
Our projectors are used to promote campaigns for local councils, fire authorities, police, nightclubs & bars.
We have projected logos for extreme sports events in the UK & Europe, in addition to providing bespoke video projection designed by Harry Houlker for the 2011 anniversary event at the Andrew Logan Museum in Powys.
Our communication mobile tower is fabricated by solid steel pipe with angle or bracing members, which provides great strength, low weight and wind resistance, and economy in the use of materials. Lattices of triangular cross-section are most common, and square lattices are also widely used. 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.
Radio masts and towers are, typically, tall structures designed to support antennas (also known as aerials) for telecommunications and broadcasting, including television. There are two main types: guyed and self-supporting structures. They are among the tallest man-made structures.
Masts are often named after the broadcasting organizations that originally built them or currently use them.
In the case of a mast radiator or radiating tower, the whole mast or tower is itself the transmitting antenna.
Mast or tower?
A radio mast base showing how virtually all lateral support is provided by the guy-wires
The terms "mast" and "tower" are often used interchangeably. However, in structural engineering terms, a tower is a self-supporting or cantilevered structure, while a mast is held up by stays or guys. Broadcast engineers in the UK use the same terminology. A mast is a ground-based or rooftop structure that supports antennas at a height where they can satisfactorily send or receive radio waves. Typical masts are of steel lattice or tubular steel construction. Masts themselves play no part in the transmission of mobile telecommunications. Masts (to use the civil engineering terminology) tend to be cheaper to build but require an extended area surrounding them to accommodate the guy wires. Towers are more commonly used in cities where land is in short supply.
There are a few borderline designs that are partly free-standing and partly guyed, called additionally guyed towers. For example:
- The Gerbrandy tower consists of a self-supporting tower with a guyed mast on top.
- The few remaining Blaw-Knox towers do the opposite: they have a guyed lower section surmounted by a freestanding part.
- Zendstation Smilde, a tall tower with a guyed mast on top (guys go to ground)
- Torre de Collserola, a guyed tower with a guyed mast on top (tower portion is not free-standing)
Materials
Typical 200 foot (61 m) triangular guyed lattice mast of an AM radio station in Mount Vernon, Washington, USA
Steel lattice
The steel lattice is the most widespread form of construction. It provides great strength, low weight and wind resistance, and economy in the use of materials. Lattices of triangular cross-section are most common, and square lattices are also widely used. Guyed masts are often used; the supporting guy lines carry lateral forces such as wind loads, allowing the mast to be very narrow and simply constructed.
When built as a tower, the structure may be parallel-sided or taper over part or all of its height. When constructed of several sections which taper exponentially with height, in the manner of the Eiffel Tower, the tower is said to be an Eiffelized one. The Crystal Palace tower in London is an example.
Russian TV tower, Penza
Tubular steel
Guyed masts are sometimes also constructed out of steel tubes. This construction type has the advantage that cables and other components can be protected from weather inside the tube and consequently the structure may look cleaner. These masts are mainly used for FM-/TV-broadcasting, but sometimes also as mast radiator. The big mast of Mühlacker transmitting stationis a good example of this. A disadvantage of this mast type is that it is much more affected by winds than masts with open bodies. Several tubular guyed masts have collapsed. In the UK, the Emley Moor and Waltham TV stations masts collapsed in the 1960s. In Germany the Bielstein transmitter collapsed in 1985. Tubular masts were not built in all countries. In Germany, France, UK, Czech, Slovakia, Japan and the former Soviet Union, many tubular guyed masts were built, while there are nearly none in Poland or North America.
Telescopic, pump-up and tiltover towers
Main article: Cell on wheels
A special form of the radio tower is the telescopic mast. These can be erected very quickly. Telescopic masts are used predominantly in setting up temporary radio links for reporting on major news events, and for temporary communications in emergencies. They are also used in tactical military networks. They can save money by needing to withstand high winds only when raised, and as such are widely used in amateur radio.
Telescopic masts consist of two or more concentric sections and come in two principal types:
- Pump-up masts are often used on vehicles, and are raised to their full height pneumatically or hydraulically. They are usually only strong enough to support fairly small antennas.
- Telescopic lattice masts are raised by means of a winch, which may be powered by hand or an electric motor. These tend to cater for greater heights and loads than the pump-up type. When retracted, the whole assembly can sometimes be lowered to a horizontal position by means of a second tiltover winch. This enables antennas to be fitted and adjusted at ground level before winching the mast up.
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General Design Criteria
Mast will be designed based on GB, BS 8100, TIA/EIA-222-G-2006, IS 802 & IS875 or equivalent international standards.
The wind loading on the tower and antennas mounted on it will withstand a ground level wind velocity of 140 Km/h and survival speed of 180 Km/h including with height in accordance with latest BSI CP3: Chapter V: Part 2: British Standard (BS)
Antenna that will be considered when it calculates wind areas will be Six GSM antennas, Two each 600 mm diameter microwave dishes & one 1.2m Ø Microwave plus all the feeders for GSM and MW antennas.
Allowance will be given to the effective windage area of the following:
Feeder runway
Feeders
Platforms and guard rails
Ladder and ladder guards
MEGATRO submit the complete data showing the drag factor from various angles of wind on the antenna offered.
Other information:
Port of Loading: Qingdao Port
Lead Time: One month or based on the customer needs
Performance Standard
Besides conform to the drawing and design, the materials and fabrication of tower components shall conform to Chinese Standard or other international standard.
Payment: TT, LC
Origin: Shandong, China
Minimum Order: 1 set
Packaging: Export standard package
Inspection: In house or their party inspection
Samples: Charge
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