HG Power Transmission Sdn. Bhd.
Client : Tenaga Nasional Berhad Date : 01/10/2018
Contract Title 500kV Double Circuit Transmission Line from PMU Bentong
South to PMU Lenggeng (Point L to LGNG) and 275kV Double
: Circuit Transmission Line from PMU Lenggeng to PMU Mahkota
Page : 1 Of 3
Cheras (Point L to Lenggeng)
Doc.
Contract No : TNB 369/2018 : MS-ER/01/REV1
No.
METHOD STATEMENT
Survey
Description
1.0 Receiving and sorting of Tower Parts or Pole Sections at the stockyard.
1.1 Area designated for sorting out of Tower/Pole Parts/Sections shall be cleared prior to
delivery of Tower/Pole Parts/Sections. As far as practical the area shall be leveled
and drains shall be constructed in and around of the area.
1.2 Tower/Pole Parts/Sections stored at stockyard shall be kept clear of ground by
placing timber or concrete spacers between the ground and Tower/Pole
Parts/Sections. Adequate spacers shall be provided when stacking bundle one on top
of another, where applicable.
1.3 Prior to delivery of Tower/Pole Parts/Sections, person in charge shall assign the area
of storing for each tower/pole type. It shall be separated in groups based on the
tower/pole type and within each group it shall be divided in to sub-groups such as
common body, body extension, leg extension etc. in order to simplify the collection of
Tower/Pole Parts/Sections for particular tower/pole location.
1.4 Care shall be taken to prevent deterioration or damage to the galvanizing during
lifting, transportation, storage and erection. Once the pole sections have been stored
or the bundles of tower parts have been opened, it shall be examined for any defect
including white rust. The affected areas shall be cleaned of white rust and shall be
touched up with approved galvanized paint.
1.5 All tower parts or pole sections shall be stamped during manufacturing with
distinguished erection marks as shown on erection drawing and Bill of Material.
1.6 Marking and numbering of each bundles shall clearly marked by manufacturer, to
enable easy identification of each bundles during sorting out at stockyard.
1.7 Bolts, Nuts and Washers shall be packed separately.
Photo: Example of segregation of tower parts
2.0 2.0 Distribution Of Tower/Pole Parts/Sections
2.1 Prior to transport of tower/pole parts/sections to tower/pole location, the required
sections, tower members, plates, and bolts(assembled with nuts and washers) shall
be separated and clearly marked for the particular tower/pole number, type, and if
applicable the body and/or leg extension portion.
2.2 Manual loading method or forklift or crane shall be used for loading of the tower/pole
parts/sections into the lorry. Timber shall be used below and in between loaded
HG Power Transmission Sdn. Bhd.
Client : Tenaga Nasional Berhad Date : 01/10/2018
Contract Title 500kV Double Circuit Transmission Line from PMU Bentong
South to PMU Lenggeng (Point L to LGNG) and 275kV Double
: Circuit Transmission Line from PMU Lenggeng to PMU Mahkota
Page : 2 Of 3
Cheras (Point L to Lenggeng)
Doc.
Contract No : TNB 369/2018 : MS-ER/01/REV1
No.
METHOD STATEMENT
Survey
tower/pole parts/sections, when they are loaded one on top of the other. Over loading
of the truck shall not be allowed, loaded tower/pole parts/sections shall be secured to
the lorry’s by mean of belts or sling wires. Bolts and nuts shall be packed into bags of
25kg to 50kg of weight.
2.3 Prior to offloading of tower/pole parts/sections at tower/pole location, the off-loading
area shall be cleared. It shall be offloaded over the timber logs placed on to the
ground. Vertical piling of tower/pole parts/section shall be limited in height to prevent
danger from overturning.
2.4 Offloading of tower/pole parts/sections shall consider the assembly and erection
procedure, so that the first part to be assembled should not be offloaded below the
parts needed for assembly and erection later.
3.0 3.0 Assembly On The Ground
3.1 Pre-assembled section/panels and/or members shall be in accordance with erection
drawing for the particular tower/pole location. Weight of section/panel to be lifted up
should not exceed safe working load for Derrick and/or Crane, where applicable. For
the sake of safety, the weight of such panel as far as practicable should not exceed
1.5 ton.
HG Power Transmission Sdn. Bhd.
Client : Tenaga Nasional Berhad Date : 01/10/2018
Contract Title 500kV Double Circuit Transmission Line from PMU Bentong
South to PMU Lenggeng (Point L to LGNG) and 275kV Double
: Circuit Transmission Line from PMU Lenggeng to PMU Mahkota
Page : 3 Of 3
Cheras (Point L to Lenggeng)
Doc.
Contract No : TNB 369/2018 : MS-ER/01/REV1
No.
METHOD STATEMENT
Survey
3.2 Bolts shall be fixed with nuts on the outsides of the structure or on bottom side of the
member/section wherever possible.
3.3 To minimize the time of erection works all smaller member bracing shall attach to its
corresponding main members or bigger diagonals, at least on one side.
3.4 Prior to erection, tower/pole parts/sections shall be checked for completeness and in
case of shortage of any of tower parts shall be reported to stock yard to arrange for
the required members.
3.5 Any shortage of main members, as determined by the engineer or Project Manager,
shall be notified for immediate delivery before the erection can be carried out and/or
resumed.
4.0 4.0 Erection Of Tower
4.1 Prior to erection of any tower/pole, stub-setting or anchor bolts setting dimensions of
the tower/pole to be erected shall be re-checked and re-confirmed against the stub-
setting or anchor bolt setting drawing and/or foundation drawing and/or checklist. In
case of any significant differences, the supervisor/engineer in charge shall be
informed and the erection works shall hold until further instruction.
4.2 First four (4) legs shall be erected manually with help of ropes. Place the derrick
close to the tower leg and by using winch, sling wires and ropes, the derrick shall be
lifted up to the first tower leg erected earlier.
HG Power Transmission Sdn. Bhd.
Client : Tenaga Nasional Berhad Date : 01/10/2018
Contract Title 500kV Double Circuit Transmission Line from PMU Bentong
South to PMU Lenggeng (Point L to LGNG) and 275kV Double
: Circuit Transmission Line from PMU Lenggeng to PMU Mahkota
Page : 4 Of 3
Cheras (Point L to Lenggeng)
Doc.
Contract No : TNB 369/2018 : MS-ER/01/REV1
No.
METHOD STATEMENT
Survey
4.3 Prepare anchor points for the upper derrick anchors. Tower leg shall be used as
anchor points. Level hoist shall be used for inclining and controlling of derrick during
the process of erection of tower. In some cases, a set of two double pulleys and
18mm nylon rope could be used for controlling of the upper side of the derrick. Care
shall be taken that rope used is at least 18mm diameter and is in sound and good
condition.
4.4 Secure wire rope guys to derrick and by level hoist to anchor points.
4.5 Once the derrick is erected to near vertical position, secure all guys maintaining
equal tension. Final position of the derrick shall be erected by releasing/pulling level
hoist.
4.6 Check security of the derrick anchors before start of erection works. In case of very
wide tower base, derrick can be lifted above one leg or between two adjoining legs.
Site supervisor or Foreman shall check security of anchors.
4.7 Tower shall be erected in assembled panels or one by one for heavier members
(especially main members). During lifting of pre-assembled panels, ropes shall be
attached at the bottom for controlling lifting. If wire rope slings are used for lifting,
gunny sheet shall be wrapped around steel/tower member to protect against
abrasion. Non- abrasive sling shall be used.
4.8 Fit internal tower bracings.
4.9 Check the tower steel/member (all bracing, bolts, nuts washer etc).
4.10 Remove all tools and equipment from the tower.
4.11 The tower site where positioning of derrick guys is not feasible (due to obstacles
such as existing lines or existing road or limited space, etc), erection of tower shall be
done by using crane. The erection of pole shall also be done using crane.
4.11.1 For the tower/pole sites located very close to an existing road or fairly
accessible by heavy vehicles, crane may be used for the tower/pole
erection.
4.11.2 Tower steel/member or pole sections shall be pre-assembled into panels or
smaller sections at or around tower/pole base, leaving open space for
setting of crane.
HG Power Transmission Sdn. Bhd.
Client : Tenaga Nasional Berhad Date : 01/10/2018
Contract Title 500kV Double Circuit Transmission Line from PMU Bentong
South to PMU Lenggeng (Point L to LGNG) and 275kV Double
: Circuit Transmission Line from PMU Lenggeng to PMU Mahkota
Page : 5 Of 3
Cheras (Point L to Lenggeng)
Doc.
Contract No : TNB 369/2018 : MS-ER/01/REV1
No.
METHOD STATEMENT
Survey
4.11.3 Once the crane is securely positioned as close as practicable to the
tower/pole base, erection shall start with lifting of assembled panels or
sections directly by crane.
4.11.4 The lifted panels/sections shall be secured to the crane hook and a guide
rope during lifting. Additional guide rope may be utilized as and when
necessary.
4.11.5 Once the panel/section is in place, it shall be fixed to position at the main
member/section using an appropriate fixing tool first before the bolts are
set.
4.11.6 After all necessary bolts at the main connection points are fixed, then the
attachment to the crane hook shall be released and the operation is
repeated with the next higher panel/section.
4.12 Generals notes
4.12.1 The methods of erection shall ensure that no part or parts or section of
the tower/pole is/are unduly strained.
4.12.2 Reaming or burning of holes shall not be allowed.
4.12.3 After erection, all foreign matter and surplus material shall be removed
from tower/pole and from the site.
4.12.4 After erection is completed, the inspection crew shall inspect the
erected tower/pole. This crew will ensure that right diameters and
lengths of bolts are used for each connection and firmly tightened. The
crew will ensure that all tower members or pole sections are installed in
accordance with erection numbers on tower/pole drawings. After
completion of the inspection, the crew shall provide an inspection report
to the engineer/site in charge for record.
4.12.5 Threads of all bolts below the anti-climbing devices shall be pinned or
locked according to approved method.
HG Power Transmission Sdn. Bhd.
Client : Tenaga Nasional Berhad Date : 01/10/2018
Contract Title 500kV Double Circuit Transmission Line from PMU Bentong
South to PMU Lenggeng (Point L to LGNG) and 275kV Double
: Circuit Transmission Line from PMU Lenggeng to PMU Mahkota
Page : 6 Of 3
Cheras (Point L to Lenggeng)
Doc.
Contract No : TNB 369/2018 : MS-ER/01/REV1
No.
METHOD STATEMENT
Survey
