6
The overheight frame twistlocks act as extensions
of the parent spreader twistlocks. Both spreader and
overheight frame twistlocks unlock and lock simulta-
neously.
Each twistlock incorporates a landing pin with a
mechanical interlock to prohibit unlock operations
when under load, similar to the Bromma spreaders.
The twistlock pins are proof load tested to 40 metric
tons.
An index unit makes the overheight frame twistlock
move fully 90° when unlocking or locking, eliminat-
ing any slack in the twistlock system.
TWISTLOCKS
The overheight frame twistlocks act as extensions
of the spreader twistlocks and will work in the same
way as a normal spreader operation.
When the twistlocks from the overheight frame are
in locked position, the overheight frame will be held
in the spreader by the twistlocks.
The latches will still be locked, but there will be a
clearance between the latches and the lugs, so the
full weight of both overheight frame and load under-
neath will hang on the twistlocks instead of the lugs
and latches.
As a result, the spreader lugs will only be under load
when the twistlocks are unlocked, and there is no
load hanging under the overheight frame.
LIFTING CARGO UNDER THE OSR45
