HD Range (Heavy Duty Mast) - Pneumatic Telescopic Hilomast
The new HD (Heavy Duty) range has been designed to the highest possible specifications, the lifting capacity of these new masts has significantly increased, even when deployed at maximum heights.
The flexibility of this range comes from using heat treated aluminium tubes that increase in 1⁄2" increments, this allows the mast to have larger top sections, in turn giving a stronger mast. These 1⁄2" increments also allow the HD range to contain up to 12 sections, giving more flexibility than ever before when designing special masts to suit specific customer requirements.
Improved locking collars have been incorporated, these are manufactured from harder material and have double the bearing width to improve the sliding between tubes. Anti-rotation keys are now 20% longer, giving our strongest resistance to torsional loads yet.
HD Mast Applications
The HD range of masts are for special applications where high head loads are required or where maximum directional stability is necessary.
- Mounting video cameras fitted with telephoto lenses
- Microwave dish antennas for Electronic News Gathering/Outside Broadcast
- Direction sensitive antennas or devices
- CCTV
- Floodlighting, anemometers and survey equipment.
Specification for Locking Collar and Non Locking Collar (NLC) models.
| Mast | Height Ext. | Height Retracted | No. of Sections | Dia. of Top Section | Vertical Head Load | Max Wind Speed Unguyed | Sail Area |
| m | m | mm | kgs | kph | metres sq. | ||
| HD9-044-155-5 | 4.45 | 1.54† | 5 | 178 | 336 | 200 | 1.1 |
| HD9-068-170-8 | 6.82 | 1.69† | 8 | 140 | 211 | 200 | 1.1 |
| HD9-107-232-7 | 10.7 | 2.32† | 7 | 152 | 250 | 140 | 1.1 |
| HD9-121-237-8 | 12.2 | 2.36† | 8 | 140 | 211 | 130 | 1.1 |
| HD9-181-256-12 | 18.1 | 2.56† | 12 | 89 | 90 | 60 | 1.1 |
| HD9-189-308-9 | 18.9 | 3.07† | 9 | 127 | 176 | 65 | 1.1 |
| HD9-230-318-11 | 23 | 3.17† | 11 | 102 | 115 | 40 | 1.1 |
| HD9-309-442-9 | 30.9 | 4.41† | 9 | 127 | 25 | 35 | 1.1 |
The table shows the vertical head load that each mast will support and the maximum operational wind speed. The weight of the antenna, however, is not usually the main criterion when selecting a mast. The limiting factor is usually the 'side surface area' of the antenna. The wind speeds shown are based on the following side surface areas: HD Masts = 11000 sq. cms.
† With non-rotating base plate.