A trailer mounted mast, such as one in the Heavy Duty 804 series, has all the advantages of a vehicle mounted mast plus more. It is independent of the vehicle used to tow it and when in use in one place for a period of time there is no loss of vehicle use. Also the life of a Clark Mast is usually longer than that of the vehicle in which it may have been built, so no costly refits are necessary.

UP TO 30 METRES
Clark Model 804 Heavy Duty Trailer masts, based on Clark's XT series Extra Heavy Duty masts, are a boon to all those who need to lift an antenna or other apparatus up to a height of 30 metres, where great un-guyed stability is required, for a short duration of time, with a minimum of physical work and manpower. One person can set up and extend the mast practically anywhere. The mast is hydraulically swung from the horizontal to vertical "ready-for-extension" position. The 804/30S weight of approximately 1070 Kg enables the trailer to be towed by most standard size cars and four wheel drives.

The Model 804 is based on a Heavy Duty two-wheel trailer specially designed for its work. Many details were incorporated during development to make operation simple, easy and safe. The air pressure for mast extension is provided by a petrol engine driven compressor. Where preferred however, a 24/12 volts DC or 240 volts AC electric motor may be specified in place of the petrol engine.

The Heavy Duty 804 series comes with four different mast heights available, the model 804/15, extended height of 15 metres, model 804/18, extended height of 18 metres, model 804/26, extended height of 26 metres and model 804/30S with an extended height of 30 metres.