MEMBINA LALUAN BARU JALAN KG RAHMAT
MERENTASI ESTET SRI GADING
BATU PAHAT, JOHOR
METHOD STATEMENT FOR BEAM LAUNCHING
1.0
Introduction
1.1 This method statement describes the method and procedures for launching the
precast 1.350m high x 0.8m top x 0.3m base x 20m long PRT-beams.
1.2 The launching layout and other relevant information about the crane are included
for reference.
2.0
Beam Details
2.1
Length = 20m
2.2
Weight = 24 ton
2.3
Quantity = 8 beams
3.0 Manpower and Equipment
3.1
Manpower
a) 1 supervisor
b) 1 crane operator
c) 4 riggers
3.2 Equipment
1 unit of 200 ton mobile crane
1 unit of trailer carrying the counter weights & accessories
4.0 Prior to Launching
4.1 All machineries and equipments shall be inspected and confirmed to be in good
conditions.
4.2 Tool Box Meeting and Safety induction shall be conducted by the Contractor.
4.3 The working access and crane parking platform shall be levelled and checked.
The working platform must be backfilled upto the abutment wall and well
compacted for stability.
4.4 Contractor to mark precisely the position for the centreline of the beams on the
abutments.
5.0 Site Setup.
5.1 Park the crane right behind the abutment, as shown in the Lifting Pan attached.
5.2 With this set up, the maximum working radius of the crane is not more than 18m.
This distance is enough to cover all the 8 beams.
5.3 Since this launching operation uses only 1 crane, the working load for the crane is
24 ton which is the weight of the beam .
5.4 According to the load chart, this crane with boom length set at 31.6m, has a lifting
of 31 ton at 18m working radius.
5.5 Since the lifting capacity is greater than working load of 24 ton, this crane and the setting
up is suitable and safe for use in this launching operation.
6.0 Launching Sequences
6.1 The trailer will bring the precast beams into the launching area.
6.2 Each trailer will carry 2 nos of the precast beams.
6.3 Park the trailer as close as possible to the crane as shown in the plan.
6.4 Then the crane can lift the first beam off the trailer and place it on the abutments.
6.5 Check the accuracy of the beam position and if satisfactory, the lifting slings will
be released.
6.6 Repeat the same sequence for the balance 7 beams.
7.0 Securing of Beams
Since the beams are resting freely on rubber bearing pads ontop of the abutments, these
beams are subjected to various vibrations from machineries working nearby and possible
movements. They have to be secured to prevent them from toppling over. This can be done by
welding the starter bars at the top with traverse rebars at 3 locations (minimum) i.e. at
two beam ends and the mid-span. Then all the 8 beams will form a raft and will be stable
and safe.
Prepared and submitted by:
LEE BOON
October, 2019