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Friday, March 23, 2018

Handling of 90 UTS rails

Handling and Maintenance of 90 UTS Rails:


1. Protection of Straightness : Avoid

• Heavy static loading and sudden impact
• Single point slinging
• End drop and flange overlap or crossing of rails
• Localized point or line contract when stacking
Ensure

• Two point slinging for rails up to 13m length. Increase slinging point at the rate
of 1 per 6.5m.(3.25m away from rail ends)
• Rails are kept horizontal and straight as far as possible while lifting, carrying or
stacking.
• Provide suitable dunnage/spacer to protect rail against point contact 
• Rails of same length are stacked on a firm level base providing uniform   support.

Successive layers may be of the same or decreasing width for stacking of unequal length of rails.
• Subsequent layers should be separated with uniformly placed suitable spacers or dunnage in vertical alignment with the base support.
• Rails ends are protected.

2. Protection of Rail Surfaces : Avoid


• Impact or abrasion of rails and rail bundles against structures, buildings, ships,

hatches, wagons, vehicles, etc.
• Crossing or flange overlap while stacking or making rail bundles. Suitable
spacers to be used while making rail bundles.
• Any rail support, handling or clamping device and rail pinch rollers which apply localized or point contact to the rail.

Ensure

• Where conventional slings are employed, use of fabric, e.g. polypropylene slings/sleeves is recommended. As an alternative, if flat link chains are used, these should be fitted with fabric sleeves.
• Rails should be protected against bruising, notching or scoring of surface 
• Wherever possible, the profile of rail support, handling or clamping device and rail pinch rollers should be contoured to rail profile 
• Use of round-link chain sling. Ideally, lift the rails by using electro-magnetic lifting devices

3. Prevention of Metallurgical Damage : Avoid

• All heating, flame cutting, welding and spot welding during rail handling or transit

Ensure:

-Protection of rail from electric arc from adjacent cables or molten metal splashes from nearby welding operations

4. Protections from Contact with Injuries Substances : Avoid
• Contact with injurious substances such as acids, alkalis, salts, fertilizers, sulphates, chlorides and nitrates

Ensure


• Rail stockpiles should be built on a well drained base as per as per Drawing No.RDSO/T-62-6219

5. Minimizing Danger to Personnel : Avoid
• Standing under suspended rails
• Sudden dropping or impact of rails
• Bundle strapping for lifting, slinging or handling of rails
• Contract with rails.

Ensure

• Steel toe-capped protective footwear are used
• Distinct coloured helmets and clothing are used for ease of identification and location of personnel while working with machine or crane
• Effective protective gloves and clothings to reduce risk of skin abrasions and lacerations and extremes of temperature
• Safe working, in the vicinity of electrical conductors and wiring

6. Stacking : Avoid
• Overlapping of rail flanges
• Crossing of layers when dunnage is used
• Leaning stack by placing rail ends (rails of the same length) in vertical alignment

Ensure


• Stacking of rails on proper concrete base and supports as per RDSO/T-6219.

• Stacking of Rails of same Length.
• Shorter rail should be placed in upper layers so that each successive layer is of
same or decreasing width
• Good vertical alignment of dunnage or spacers in the completed stack should be
done by placing them in identical positions along the rail length
• Use of suitable rail handling equipment, such as electromagnetic lifting devices,
rail grips etc.

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