Lowering headframe masts

• Headframe supported by three stainless steel cables for longer-term stability than twin cable systems
• Option to install mechanical latching system on three arms, to release strain on cables when headframe is in the operating position
• Headframe supplied prepared ready for installation, complete with three cables looped for dropping into the mast shaft and junction box for the multicore cable mounted on headframe
• Single 275Kg or single 550Kg winch located in the base of the mast. The winch is self-sustaining, with a gravity latch on the input shaft
• A 10mm earth terminal is provided in the base of the mast
• Single multicore cable for all lanterns is located on an independent pulley, stopping multiple cables from becoming entangled inside the mast

• Single multicore - with 18 cores on the 275Kg winch mast (for up to 8 floodlights/lanterns), or 25 cores on the 550Kg model (for up to 12 lanterns)
• A multicore electric cable, with integral signal cables for CCTV and WiFi, is available on request
• Electrical cable is supplied with a plug and socket at lower end. This means you can detach the cable and power the headframe at ground level using a separate extension cable
• A lightweight dual-speed reversible power tool is supplied with its own mounting bracket, which is clamped directly to the body of the mast. A remote hand-held box with non-latching buttons controls the unit, enabling the operator to stand at a safe distance when lowering.

Building your mast

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Step 1
- Identify the correct Abacus floodlight from the lighting design and then…

Step 2
Select the correct headframe option based on:

- the floodlight arrangement

- external IP65 or internal control gear (internal gear only available with Challenger® 4)

Step 3
Select the central assembly code determined by:

- mast height e.g. 30m is RLW-HF-30M-xxx-xx

- multicore electric cable, for 275kg winch is 18core (18C) & 550kg winch is 25core (25C); e.g. RLW-HF-30M-18C-XX

- whether the latching system is required (-L) or not (-NL); e.g. RLW-HF-30M-18C-NL

Note: the central assembly is delivered to site fully assembled with stainless steel cables and multicore cable factory-assembled ready for immediate installation.

Step 4
Select the correct mast structure based on:

- mast height

- winch capacity (determined by headframe choice)

- site wind speed and headframe area

For each height and winch capacity there is a light duty and medium duty mast option, which covers most requirements. Other mast structures for higher wind loads are available on request.

Step 5
Select any necessary accessories for example:

- the floodlight mounting bracket, required if a floodlight with stirrup is selected (not necessary for the Challenger® 4/RLW model)

- Power tool operating system, dependent on winch capacity

- Lightning rod