Guys for Support
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Transcript of Guys for Support
Anchoring and Providing Guys for supports : Normally the guys are provided to the supports at the following places : 1. Angle locations 2. Dead and locations 3. Tee-off points . !teep gradients location to avoid uplift on the pole. !ometimes storm guys are provided along the straight run at e"ual intervals where wind pressure is more than #$%g&'2. The installation of guy will involve the following wor%s. 1. ()cavation of pit and fi)ing of stay rod 2. *astening of guy wire to the support 3. Tightening guy wire and fastening to the anchor. The mar%ing of the guy pit for e)cavation+ the e)cavation of pits and setting of the anchor rod must ,e carefully carried out. The stay rod should ,e placed in a position such that the angle of inclination of the rod with the vertical facr of the pit is 3#oo as the case may ,e. The concreting of the stays at the ,ottom should then ,e carried out. The ,ac% filling and ramming must ,e well done thereafter and allowed to set for at least - days. The free end of the guy wire is passed through the eyes of the anchor rod+ ,ent ,ac% parallel to the main portion of the guy and ,ound after inserting the ./ thim,le. The loop is pro0ected ,y the ./ thim,le where it ,ears on the anchor rod where the e)istence of the guy wire proves ha1ardous+ it should ,e protected with a suita,le as,estos pipe+ fitted with concrete a,out 2 't. length a,ove the ground level+ duly painted with white and ,lac% stripes so that it may ,e visi,le at night. The turn ,uc%le shall ,e mounted at the pole end of the stay and guy wire so fi)ed that the turn ,uc%le is half way in the wor%ing position+ thus giving the ma)imum movement for tightening or loosening. .uy insulators are placed to prevent the lower part of the guy from ,ecoming electrically energised ,y a contact of the upper part of the guy when the conductor snaps and tail on them or due to lea%age. .uy insulator shall ,e located at 2&3 of its length from the ground. The minimum ,rea%ing load of guy insulator shall ,e 22$$ 3v. for 11 34 and $$$ %g for 5T lines. Fixing of cross Arms and Insulators : After the erection of supports and providing guys the ne)t step would ,e to amount the cross arms on the support. The practice of fi)ing of cross arm ,efore the pole is erected is followed in some states. /n case the cross arm is mounted after the support is erected+ the lineman should clim, the support having re"uisite tools with him. The cross arm is then tied to a hand line and pulled up ,y the ground man through a pully till the cross arm reaches the lineman. The ground man should station himself well to one side so that if any material drops from the top of the pole it may not stri%e him. All the materials re"uired should ,e lifted or lowered ,y means of the hand line. /n no case the material or the tools should ,e dropped or thrown from the pole top. Insulators : The pin insulators are fxed in the holes provided in the cross arms and the pole top brackets. The insulators are mounted in their places over the pins and tightened In the case of strain or angle supports, where strain fttings areplaced over the cross arm. The nut of the straps is so tightened that the strapcan move freely in horizontal directions, as this is necessary to fx the strain insulator.