POLE INSTA I NSTALLAT LLATION ION METHODOLOGY METH ODOLOGY
1.0
PURPOSE
This purpose of this procedure is to ensure concrete pole lifting & erection to provide the safely installation and as per the design requirement and specification.
2.0
DEFINITION
Supervisor
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Authorized crafts man responsible for the supervision of the job.
Crane perator
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Authorized! certified persons shall be operating during erection poles.
Crane "igger
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Sling
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Competent person shall be #or$ during erection poles A non-metallic sling of minimum suitable length and appropriate S% for the #eight of the load being lifted.
' The Supervisor Supervisor shall ensure ensure that no persons persons shall access the #or$ #or$ area throughout throughout the #or$ procedure #ithout first gaining his approval. ' (ole erection erection shall shall not be carried carried out using manual manual gear. gear. ' All lifting lifting equipment equipment shall be of an approved type) fit for purpose purpose and be #ithin #ithin the current pole erection. ' *o pole shall shall be erected if the the pole is damp or #et or or during periods periods of rain. rain.
3.0
TRANSPORTATION & HANDLING
%hen poles are loaded in more than one layer) timber spacers!bearers are not less than +,,mm /mm should be placed bet#een each layer) vertically above the bottom ro# supports. (oles in the second and subsequent layers must have steel choc$s placed at the butt ends of the t#o outside poles) #ith the tips of the poles resting in scalloped timber bearers. %hen there are t#o or more layers) the poles in the second and subsequent layers should alternate in direction) #ith the tips above the butts of the preceding layer) to provide the best load sharing bet#een ale. The completed load of concrete poles should be fastened do#n using a minimum of four sets of chains and load binders only. The fastening points should al#ays be over the timber bearers. All fastening points must have a rubber pad placed bet#een the chains and contact point of the concrete pole) to prevent the chains damaging the eternal surface of the poles. *o loads are to be secured #ith nylon load restraints only. oads #ill not be permitted to leave any Concrete (oles yard unless secured by a minimum of four chains and load binders.
Align fastening timber bearers
(oles must not be secured via joint lugs
(oles of mied sizes should be arranged to provide the best possible sharing of #eight across the tray of the vehicle. %hen poles of different diameters are placed in one layer) a short support bearer in conjunction #ith pac$ing timbers can be used to support the overlying bearer.
Pole of differe! di"#e!er re$%ire %''or! (e"rer "d !i#(er '")*i+
,.0
UNLOADING
%hile unloading) it is paramount that the follo#ing guidelines are follo#ed to maintain the integrity of the product and) most importantly) to ensure the highest level of safety. %hen unloading) it may be necessary to roll a pole side#ays to gain access for fitting a lifting chain or sling. 0efore removing the choc$s) ensure that a second set of choc$s is in place) to limit the movement of the pole. 1ntil lifting chains or slings are fitted to a pole and secured) the pole and every other pole remaining on the truc$ should be choc$ed on both sides to prevent accidental side movement.
0efore unloading the poles) the vehicle must be positioned #ith a minimum of cross-fall to prevent the load from moving. 2f the transport operator considers the cross-fall too ecessive to allo# safe unloading) a more suitable area or positioning of the truc$ must be sought) at the discretion of the operator. 2f a cross-fall cannot be avoided) the pole on the higher side must be the first pole of each layer to be unloaded. 3ven #hen on level ground) al#ays unload the outer pole first - never ta$e an inner pole. The vehicle must not be moved #hile any part of the load is unsecured. 2f the vehicle is required to move only a short distance and the speed does not eceed 4 $m!h on smooth and level ground) the poles can be secured #ith a single chain and choc$s on the t#o outside poles on each layer. %hen unloading by crane on site) a dual-point lift using double-legged chain slings must be used. The balance point is mar$ed on the pole or pile 5at approimately ,.6 length7 from the butt of a tapered pole or at the midpoint of a parallelsided pile. A chain sling is normally used) but a fabric sling can be used as an alternative.
Ulo"di+ 'ole -i! )"(le li+
/.0 LIFTING FOR THE FINAL PLAEMENT
Slinging and load handling is perhaps the most vital part of any lifting operation. 8o not get involved in any slinging or elevator operations unless you have been adequately trained and authorized to do so. 9ailure to follo# this advice could lead to death or injury. A proper ris$ assessment must be completed) all slings and equipment must be inspected before use) any faults reported and if damaged removed from service. 8uties include: ' Attaching and detaching the load to and from the base machine ' 1sing the correct lifting accessories in accordance #ith the lifting plan or procedure ' ;isually chec$ing the lifting accessories for damage before use
' 2nitiating and directing the movement of the load by giving the appropriate Signals to place the load safely 8ue to the nature of the #or$ performed by earthmoving plant) often in unstable ground conditions) it is necessary to consider machine self-recovery 5de-bogging7 as part of an operatorhigh side? ' Climb off the machine from the high side ' Assess the situation An operator #ill #orsen the situation by repeatedly driving the machine bac$ and forth until selfrecovery is all but impossible. @o#ever) most hydraulically po#ered machines are capable of self-recovery) using the attachments as hydraulic jac$s. 9or eample) a trac$ed hydraulic ecavator attachment can he lo#ered until the trac$ is clear of the ground the trac$ can then be pac$ed up #ith timbers or sle#ed out of all but the #orst situation. 2f it is necessary to use another machine to push or to#) it is important that the to#ing point or the pushing point is chosen carefully: parts #hich are li$ely to be damaged by pushing or pulling must never be used.
=achine recovery can be hazardous and the follo#ing basic rules must be observed: ' ne person only should give instructions 5unless an emergency arises7 ' All persons must be $ept #ell clear of to# ropes our #inch ropes under load ' The recovery vehicle should have a cab to protect the driver from the #hiplash of a bro$en rope
' The load carrying capacity of any chain or #ire rope used for to#ing must he carefully assessed ' Chains or ropes used for to#ing must not subsequently be used for lifting operations ' A chec$ must be made that all recovery equipment is correctly applied before attempting the recovery ' Tools) not hands) should he used to clear any obstruction 9or concrete poles) such as the po#er distribution ranges) the quic$est and easiest method of lifting the pole for installation is by using a cho$e chain or sling. This can be achieved by #rapping a chain or sling around the pole at least B,,mm from the tip of the pole. =ost po#er distribution and lighting poles include a through-tube in this area that can be used to secure a bolt above the chain or sling to prevent slip.
.0
INSTALLATION METHOD
E)""!io
Concrete poles can be installed using direct embedment methods. The most economical method of installation #ill depend on the sub-soil conditions) access to site for plant and equipment and the design criteria applicable to the pole. A hole for the concrete poles is augured to the required depth. *ominal setting depths for po#er poles) *ominal setting depths quoted are based on a standard set of soil strength parameters and hole diameters. Care should be ta$en to determine #hether the site conditions meet the minimum requirements applicable to the specified embedment depth.
E)""!e (4
A%+er
The auger size should allo# sufficient room to either adequately place and ram solid the bac$fill) or pour and vibrate the concrete bac$fill. As a rule of thumb) the hole diameter should be a minimum of the pole butt diameter plus ,,mm) rounded up to the nearest standard auger diameter 5typically in increments of +/,mm) i.e. D,,) 6/,) B,,) /,) E,,) +,/,) +,,) +D/,) +/,,) etc.7.
Work near overhead or underground essential services
%e #ill ensure) #here reasonably practical) that that no-one comes #ithin an unsafe distance of an overhead or underground po#er line. 2f maintaining a safe distance is not reasonably practical) #e #ill: •
assess the ris$ associated #ith the proposed #or$
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implement control measures consistent #ith the ris$ assessment
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contact and consult #ith the FT =anagement.
For excavation work near underground essential services:
ta$e all reasonable steps to obtain current underground essential services information before directing or allo#ing the ecavation #or$ to start •
•
provide this information to any person engaged to carry out the ecavation #or$
consider this information #hen carrying out) directing) or allo#ing the carrying out of the ecavation #or$ •
•
ensure this information is available for inspection.
I!"ll"!io
(ole 3rection by mobile crane
0ac$ 9illing #ith sand
0ac$ 9illing #ith concrete pole footing
Typically) the cuttings generated from auguring the hole are considered satisfactory bac$fill material. 2t is regarded as good practice to use a sand bac$fill at the base of the pole and then pole standing finished and chec$ed concrete bac$fill at the base of the pole footing. 0e a#are of the dangerous of pole standing and stay alert as you could fall into pole standing and!or over turn machines and into them. (eople are $illed or seriously injured #hen #or$ing in pole standing. (ole standing #or$ has to be properly planned) managed) supervised and carried out to prevent accidents. After fiing the pole in concrete foundation) the pole needs to be supported by eternal supports for 64 hours. The poles are ready install electrical instrument after 64 hours.
5.0 SAFETY PREAUTION
All safety precaution measures shall be strictly adhered so as to avoid injury or endanger to life of all personal concern. ' All the erection team members are instructed and a#are of the safety at #or$. Short courses and training regarding to safety at #or$) should be organized by concerned company. ' All the team must use enough safety tools and equipment for the safe and secure #or$ i.e. helmets) shoes) ropes) gloves and glasses etc. ' As all the pole members are heavy in #eight so their loading) unloading and moving on site must be done carefully. ' 9irst aid is provided for all the team #hen they get some injuries during the erection #or$ and ' 9irst aid bo is provided by the company on the sites. ' @andling of pole can be ris$y) so all the teams must use cranes) for$ lifter) pulleys and other tools for the safe #or$.
' 2t has to be guided to all the technicians to use their safety tools and they #ill be told about the safety at #or$ during all of the erection #or$. ' Some sharp edges of pole structure are a reason for injuries everyone is advised to use long sleeve leather gloves etc. ' %or$ing area to be barricaded and #arning sign to installed ' Tool bo tal$ to be carried out before starting any #or$.
