Handlıng Instructıons
Kablo Hakkında Teknik Bilgiler
CABLE DRUM HANDLING
Keep the cable protected until it is used Drum handling and storage guide A Cable is a valuable product. If handling is not done correctly, the drum and in turn the Cable wound over it can be damaged. At times, damage might not be discovered until after installation, when repairs can be extremely difficult / expensive.
The purpose of this guide is to illustrate, how damages can be avoided by correct handling and storage practices.
•Keep the drum upright: The drum is designed to be handled in upright position. It may not sustain if lifted lying flat. When kept upright, the cable layers will not get entangled. This would obviate problems during laying. Always store and move the drum in an upright position. In no case, the drums be stored ‘on the flat’ that is with flange horizontal.
• Roll in direction of arrows only: When the drum must be rolled for some reason, always roll the drum in the direction of arrow. This way, the cable will not unwind or loosen on the drum. However, this does not mean that the drum can be rolled freely for any distance. Limit rolling distance to five metres. If it is rolled beyond this limit, the cable wind will come too tight and cut off the rope holding the cable end. This may deform the cable and make it unfit for use. Once placed in position, use proper stoppers to prevent drum from rolling.
• Lift the drum without damage: When lifting the drum, use a shaft through the centre of the drum and a spreader beam. If these are not available, lift with as long a rope as possible, so that the sides of the drum are not damaged. However, make sure that the cable head is not pinched between rope and drum. Ensure that drum thus hoisted is well balanced. Also, ensure that it is not touching other drums. Take care, not to give any impact to the drum being lowered. In case a cable drum must be temporarily in a waiting position, keep it hoisted. Do not repeatedly put it down.
• Handling with fork lift: The forks must be longer than the width of the drum being lifted. Preferably, different widths of drums should be marked on the forks enabling the operator to select the correct position for the given drum size. When moving the drum, tilt the truck mast so that the drum remains in the fork and the points don’t touch the ground. Raise the forks of the forklift at least 6 to 8 inches above ground. Insufficient clearance may cause the drum to be dragged on the ground and eventually damaged or dropped off the forks, especially if the ground surface is uneven. Don’t release the drum until the truck has stopped completely. Don’t push the drum with the truck. Leave sufficient room between drums so that the fork doesn’t damage the drum. * Nail with caution Avoid punching nails into cable drums. If nailing is utmost necessary, make sure that they don’t touch the cable.
•Nail with caution: Avoid punching nails into cable drums. If nailing is utmost necessary, make sure that they don’t touch the cable.
•Secure the drums firmly: The round shaped cable drum rolls easily. It is in a very unstable state because it’s centre section is vacant and the whole weight rests on it’s peripheral section. Make sure that each drum is provided with stoppers to prevent from rolling during storage. It is preferable that large drums should be lifted from the base onto triangular or square wedges. The wedges should be positioned by the flanges or the full width of drum.
• Avoid stacking: Stacking of drums should be avoided.
•Fasten the drums firmly: During transportation, the drum shall be fastened to the base through the centre hole or across the flanges with wires or ropes. To prevent movement of drums, a combination of wedges and transportation support should be used and tied down front and rear.
•Don’t drop drums: The drums must not be dropped from the vehicle. The drum is to be lifted either by winch or fork-lift. When neither of this is available, a makeshift ramp with approximate inclination of 1:4 should be constructed. The cable drum should then be rolled over this ramp by means of ropes and winches. Additionally, a sand bed at the foot of the ramp may be made to brake the rolling of cable drum. Make sure when unloading, the drum doesn’t strike another drum.
• Storage for longer periods: The site chosen for storage of cable drums must be level and dry. It should have a firm, preferably concreted surface. This will avoid sinking of the drums and difficulty in subsequent shifting. All drums should be stored in such a manner as to leave sufficient space between them for air circulation. During storage, the drum should be rolled to an angle of 90° once every three months. Also, tie bolts shall be checked and tightened at regular intervals. Always turn a cable drum using turn table. Never use crow bar if turn table is not available. Two well greased plates can be used instead. Storage of cable drums under shed is not essential unless the storage is for very long period. However, the cable drums shall be protected from direct sun light by covering them by tarpaulin or thick black polyethylene sheet.
• Rewinding: When for any reason, it is necessary to rewind a cable on to another drum, the barrel of the drum should have a diameter not less than that of the original drum. It is utmost important while rewinding to avoid dragging of the cable against drum flanges or sharp edges. Avoid pulling the cable across long unsupported spans. Provide freely rotating roller supports. Do not pull a cable with powered vehicle.
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