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The intermediate double taper box boom
Energy Cranes EC40 is a proven machine developed from the popular American Aero Bay-Master 20.
Designed to withstand arduous service on substantial manned offshore installations and drilling rigs, in a typical 50ft (15.2m) boom configuration, the EC40 delivers 10.5 US tons (9.1 tonnes) on-board and 6.1 US tons (5.6 tonnes) off-board load capability at 20ft (6.1m) radius.
Designed and manufactured under API 2C-6th edition, the EC40 can be configured to optimize the on-board and off-board capacity by utilizing the established methods within API 2C.
Rotating Structure
The reinforced base plate, to which the bearing, gearbox, and luffing cylinders are bolted, virtually eliminates shock-load and, in consequence, extends bearing life. The symmetrical superstructure avoids localised stress. Continuous 360° swing control is delivered through two heavy duty hydraulic planetary drives, with static and dynamic brakes, mounted to the ball ring so as to facilitate ease of inspection/maintenance of all retaining bolts.
Boom & Load Control
Box Booms are available from 30-70 ft (9.1-21.3m) in length. A jib extension accommodates the auxiliary hoist line/sheave. Boom luffing cylinders equipped with counter-balance valves are utilized to control the boom position. Main and auxiliary hoist control comes from hydraulic planetary hoists equipped with counter-balance valves for power load-lowering. Automatic spring-applied hydraulic release brakes and ratchet/pawls are fitted. Safety kick-outs such as Anti-2-Block are standard.
Operator’s Station
An operator’s station can be mounted on the body (walk-around) or remote based on the project requirements. Hydraulic controls have dead-man failsafe and there are pressure gauges for each pump. The control panel includes prime mover controls/gauges.
Options
- Power Units
- Load Indicator Systems
- Electrical Equipment
- Load Hoists
- Whip Extension/Hoist
- Rigging
- Pedestal Adapters
- Hydraulic Systems
- Cold Weather Materials

