SCHWING GMBH – Separate Placing Booms SPB 02/2014
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The construction bolts in the mast section, are M36 x 360 cap screws and be of
10.9 grade. The torque for these bolts is according to drawing No.10216625.
Correct pipe clamps are to be used to attach the delivery line and plastic support
plates are also required where the delivery line is attached to the ladder brackets.
Safety clips must be fitted to all pipe clamps and where required “R” clips must be
in place (such as the working platform mounting points).
To join the column sections together, initially the “Top” section of mast has to be
“packed up” level and the next section suspended from the crane, for this
operation some form of support, of sufficient capacity, is required.
Total lifting weight of the column assembly complete with 3 No. 6m sections, top
section, working platform, ladders with back rests and the concrete delivery
pipeline is approximately 5,500 kg. A crane of sufficient capacity is required for the
operation of lifting the column on top of the heavy duty cross frame.
Otherwise, the column must be assembled on top of the heavy duty cross frame,
one piece at a time. For this method of assembly, a form of access platform is
required for the assembly operatives to work safely at 6m, 14, and at 20m height.
The total lifting weight of the boom assembly is 6,400 kg and if the site does not
have the tower crane, which could not lift the boom in one piece, it can be split
into "turret section" and "boom packet". The weights of the split sections are
2,600kg and 3,800 kg respectively.
THE OPERATION OF INSTALLING A “SCHWING” PLACING BOOM
REQUIRES THE CRANE TO BE MADE AVAILABLE WHEN THE ASSEMBLY
TEAM IS READY TO CARRY OUT THE INDIVIDUAL OPERATIONS.
TRYING TO CARRY ON WITH NORMAL SITE MOVEMENTS AND “FIT IN”
THE TASKS REQUIRED FOR ASSEMBLY, NOT ONLY LEADS TO DELAYED
AVAILABILITY OF THE BOOM, BUT ALSO THE POSSIBILITY OF MISTAKES
OCCURING BECAUSE OF LONG DELAYS BETWEEN OPERATIONS.
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