Web Slings

Specification

How to Specify Common Web Slings?
Sling Type
1. Type U (UU) : Unlink each end
2. Type 1( TC ) : Triangle & Choker
3. Type 2( TT ) : Triangle each end
4. Type 3&4 (EE) : Eye & Eye
5. Type 5 (EN) : Endless
6. Type 6 (RE) : Reversed Eyes

No. of Plies : 1,2,3 or 4
Sling Width : in mm
Web Material : Nylon(N), Polyester(P)
Eye Treaments ( only for Type 3 or 4)

1. Standard
2. Lined Bearing Point
3. Fully Lined
4. Wrapped Bearing Point

Sling Length : Pull to pull length, in metre
Rated Capacity : Safe working load limit, in tonne

Special Purpose Web Slings
These special purpose slings need to be made-to-order.

1. Bridle Slings
2. Wide-lift Slings Designed to support the load over a wide area thus offering balance.
3. Drum Handling Slings
4. Vertical drum handling
5. Horizontal drum handling
6. Stone Handling Slings
7. Speciall designed with high abrasion resistance for handling stone & concrete blocks and concrete building panels.
8. Gas Cylinder Slings Specially designed for handling gas cylinders.

Application

WEB SLING

1) Purpose
It is used to hoist , lift and handle material.

2) Construction
Fabricated by sewing together woven nylon or polyester webbing.

3) Basic sling types
Fabricated by sewing together woven nylon or polyester webbing.

4) Basic Hitches
Every lift using a sling makes use of one of these basic hitches.

Articles

Procurement, maintenance and using the web sling safely

Important Requirements
• A web sling must be manufactured to an approved standard and must have a permanent label on it stating the size, grade, rated capacity and reach.It may be colour coded as well.
• It must come with a test certificate.
• Any fitting must be stitched onto the sling.
• Choose the correct type of sling for the specific job.
• Web slings are not recommended to be used at temperature above 80°C.
• It is recommended that the web sling be thoroughly inspected every year and recorded.
• As a safety practice, the web sling should be inspected visually daily for signs of wear,tear or damage.
• Web sling with aluminium fittings cannot be used in the presence of caustic chemicals.
• Nylon slings are not suitable for handling acids.
• slings are not suitable for handling caustic chemicals.

Maintenance
• Web slings should be stored in a cool, dry area as mositure can damage the slings.
• Sunlight will slowly degrade the web slings so keep away from sunlight when not in use.
• Web slings may be washed and air-dry. Do not use hot air blower or oven to dry it.
• Keep away from chemicals. Check manufacturer's guide for chemical resistance.

Daily Inspection Checklist
• No holes, tears, cuts or snags.
• No Knots or kinks
• Check for excessive abrasive wear
• Broken stitching
• Red warning stitches exposed, indicating overloading.
• Missing or unreadable label.
• Any chemical burn mark.
• Burnt mark.
• Distorted or crushed webbing.
• Distorted or cracked metal fittings.
• Other visible defect that may weaken the sling.

Safe lifting practices
• Slings should not be loaded above the safe working limit. Take the sling angle into account.
• Choose the correct sling for the job at hand.
• Use the sling of correct length. Do not shorten by knots, bolts.
• Get rid of kinks, loops or twist in the sling.
• Lift slowly to avoid shock load stressing of the sling.
• Pad sharp corners of load to prevent damage to the sling.
• Do not drop sling with metal fittings to prevent damage to the fittings and sling.
• Ensure the sling is properly assembled before lifting.
• Ensure sling is free and loose before removing after any lifting job.

Adverse Effect Of Sling Angles On The Rated Capacity Of A Sling
The sling angle is measured between the horizontal plane and the sling leg .This may apply to a single leg sling in an angled vertical hitch or basket hitch or to a multi-legged bridle sling . Whenever the sling is pulled at an angle, the tension in the sling increases in proportion to the size of the angle.

It is therefore recommended angles below 45 degrees should be avoided.

Sling Capacity =Rated Capacity x Adjustment Factor

Table of Adjustment Factors for Common Sling Angles