Guyed mast

A guyed mast is a tall thin vertical

wind loads. Examples include masts on sailing vessels, towers for telecommunications, meteorology, and masts on cranes, power shovels, draglines, and derricks, starting with the simple gin pole

.

Applications

The principle applications of guyed masts are the

draglines, and derricks, the simplest of which is the gin pole

.

Guyed masts are frequently used for

rhomboidal

) shape gave it the shear strength that it only required one set of guys.

Guyed masts are sometimes also used for

pylons (transmission towers), although their usage in agricultural areas is problematic because anchor foundations handicap ploughing. The tallest guyed tower is currently^[when?] the 2,063 feet (629 m) KVLY-TV mast near Blanchard, North Dakota

, USA.

The mast on heavy equipment such as a crane is its main supporting tower, typically of trussed steel construction. Wire rope guys typically led back to the crane's base stabilize it and support its ability to bear significant shear loads while lifting.

A sailboat's mast is supported by shrouds and stays - nautical equivalents of guy wires
The Sendeturm Jauerling is a partially guyed 141 meter tower built in 1958, consisting of a 35-metre-high free-standing steel framework tower, which carries a 106 meter guyed steel tube mast on the top
The Trispastos
("three-pulley-crane") is a simple guyed mast form of crane that dates to Greco-Roman times

Partially guyed tower

partially guyed tower

that consists of an 80 m (260 ft) high reinforced concrete tower topped since 2012 by a 223 m (732 ft) steel lattice television mast

A partially guyed tower is a tower structure which consists of a free-standing base, in most cases of concrete or of lattice steel, with a guyed mast on the top. The anchor base of the guyed mast can be on the top of the tower or on the ground.

Use

Partially guyed towers are typically used when a very high tower for FM and TV transmission is required, while also carrying antennas for directional radio services at a much lower height. In such cases the antennas for directional radio services are mounted on the top of the free-standing part of the tower, while the guyed mast on its top carry the FM and TV antennas. They can be also used in order to upgrade small stable towers (like watertowers) with a long antenna mast for FM and TV broadcasting. However their use is rare, and they exist chiefly in certain European countries.

Note that mast radiators which stand atop an antenna tuning hut (a.k.a. helix building) are not considered partially guyed towers, because the hut is much smaller than the mast radiator. Such constructions include the Mühlacker radio transmitter and the Ismaning radio transmitter.

Anchor placements

Partially guyed towers can be divided into two types, depending on the placement of the guy anchors.

Atop the free-standing tower

Guyed masts on skyscrapers or wider towers are often guyed on the roof of the free-standing basement structure. In such cases, there is no major constructive difference of the guyed mast to a guyed mast on plain ground, and the construction of the free-standing basement tower does not differ much from a tower of the same height without a mast. The guyed mast of such constructions is usually of lesser height than basement tower.

On the ground

Partially guyed towers in which at least one basement of the guy anchors is on the ground are more rare. The placement of guy basements across a broader geometric base allows for a mast much taller than the free-standing basement tower, and the integration of tower and mast should be considered in all facets of construction and maintenance.

Gallery

200 foot (61 m) radio mast of an AM radio station in Mount Vernon, Washington, USA, supported by three sets of 120° guy lines
Mast guy line
Guyed mast guy line anchor
Guyed mast transmitter building
A guyed FM and TV radio mast in Christmas, FL. It is 1,695 feet (517 m) tall.^[1]