Overheight cargo still has to move through a terminal built for boxes. The Bromma OSX45E is how: a fully automatic, electrically operated overheight frame for flat racks and open-top (OOG) containers, working with the spreader you already have.
It locks itself
AUTOLOCK is what separates the OSX45E from a mechanically operated frame.
A landing pin at each corner, each independently verified by its own proximity switch, confirms the frame has seated correctly. When all four confirm, the twistlocks rotate to locked and a red LED says so. Unlocking takes a deliberate double command from the operator, confirmed by green, so it cannot happen by accident.
The operator performs no open-close sequence at all. That takes a step out of every lift, and with it the human error that came with the step.
And it cannot lock in the wrong position
Until all four landing pins confirm, the twistlocks are blocked from rotating — mechanically and electrically. If a pin fails, the indicator lights flash to say so.
If gravel, debris or ice obstructs any one twistlock, all four return to the open position. It is not possible to lift from a partially locked state.
And if power is ever lost, each twistlock can be operated by hand, even while the frame is sitting on a container.
Bromma calls these three systems triple safety redundancy. In practice there are only two states the frame will let you lift from: all four locked, or none.
It tells you what it is doing
Two sets of LED indicators, one on each side, report the position of all four twistlocks together — green open, yellow landed, red locked — readable from the cab or from the ground.
Behind them an IP-67 rated PLC keeps a record and shows it on the frame: battery voltage and charge status, total time in operation, cumulative lifting cycles as TEU handled, and error messages and fault codes. A smart service mode guides a technician through troubleshooting.
Maintenance follows what the frame has actually done rather than how long you have owned it.
It fits the spreader you already have
The OSX45E connects to any spreader of ISO standard base measures within 20 to 45 ft, without adapters and without modification to the parent spreader — independently of which way that spreader's twistlocks rotate. Its twistlocks act as extensions of the spreader's own, locking and unlocking together.
As the spreader telescopes, the frame telescopes with it. One unit handles 20, 30, 40 and 45 ft containers as well as flat racks, with no changeover in between.
A fixed version is available at 20 or 40 ft for operations handling a single size, with the same clearance heights, the same rating and the same AUTOLOCK.
It needs nothing built for it
The OSX45E does not require a dedicated parking fixture. It can be left directly on the quay, on top of a flat rack, or in any suitable location, held by its own twistlocks — which saves both the structure and the quayside space it would take up. An optional 20 ft parking frame is available for operations that prefer a fixed resting position.
Power is an internal 24 V battery system charged by solar panels on the beam, with 110 or 220 V cable charging as backup for high-cycle environments. Nothing connects to the crane. Nothing is installed on the quay.
Between lifts it looks after itself. The panels keep the batteries charged while it stands idle, and after three to five minutes of inactivity it sleeps. It wakes the moment the spreader lands and the operator calls for the twistlocks. There is no start-up procedure.
Built in Sweden
The OSX45E is hand built in Sweden from high-grade S355 steel by licensed welders, CE certified to ISO 3834-2 and designed in accordance with EN13001. It is approximately 15% lighter than competing frames, which returns capacity to the cargo, and it is rated from −20 to +50 °C.
Specification
Telescopic from 20 to 45 ft. 50 tonnes SWL evenly loaded, 50 tonnes ±10% eccentric, to EN13001 across 600,000 cycles. Free clearance heights of 2.4, 2.7 and 3.0 metres. Fixed versions at 20 or 40 ft.
Bromma also offers the mechanical OSR45, telescopic from 20 to 45 ft, for operations where a frame with no electrical system is the better fit.