Lifting sling
Contents |
[edit] Introduction
A lifting sling is used with a lifting device or crane to lift objects effectively and safely. Slings usually consist of cable, chain, rope or webbing, and generally include metal devices such as hooks, shackles, links or rings. Different types of sling are appropriate for different applications, depending on their composition, working load, length, slinging mode and so on.
[edit] Types of sling
[edit] Nylon
Nylon slings are strong, dense and flexible; they will stretch by approximately 6-8% of their length. However, nylon can absorb liquid, which can affect its strenght.
[edit] Polyester
Polyester slings are are known as 'web slings' or 'rigging slings' because of their synthetic, web-like composition. Polyester differs from nylon in that its stretch is approximately 3%, and it is safe for use where bleaching agents or acids are present.
[edit] Wire rope
Wire ropes are categorised based on the number of wires in a strand and how many strands are wrapped around the core. The more wires there are, the greater the flexibility and resistance to kinks, but also the more liable they are to abrasion wear.
[edit] Chain
Chain slings are typically suited to more demanding lifting operations. They are usually constructed from Grade 80 or 100 high strength alloy steel and can be designed and fitted to create custom sling assemblies for almost any kind of lift.
Chain slings should be stored in a dry and clean area to avoid damage, rust and corrosion. They should be regularly inspected for defects, including:
- Wear and stretching.
- Bent or twisted links.
- Ineffective safety catches.
- Cuts and nicks.
- Gouges.
- Heat discolouration and welding splatter.
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
The UK’s largest air pollution campaign.
Future Homes Standard, now includes solar, but what else?
Will the new standard, due to in the Autumn, go far enough in terms of performance ?
BSRIA Briefing: Cleaner Air, Better tomorrow
A look back at issues relating to inside and outside air quality, discussed during the BSRIA briefing in 2023.
Restoring Abbotsford's hothouse
Bringing the writer Walter Scott's garden to life.
Reflections on the spending review with CIAT.
Retired firefighter cycles world to raise Grenfell funds
Leaving on 14 June 2025 Stephen will raise money for youth and schools through the Grenfell Foundation.
Key points for construction at a glance with industry reactions.
Functionality, visibility and sustainability
The simpler approach to specification.
Architects, architecture, buildings, and inspiration in film
The close ties between makers and the movies, with our long list of suggested viewing.
SELECT three-point plan for action issued to MSPs
Call for Scottish regulation, green skills and recognition of electrotechnical industry as part of a manifesto for Scottish Parliamentary elections.
UCEM becomes the University of the Built Environment
Major milestone in its 106-year history, follows recent merger with London School of Architecture (LSE).
Professional practical experience for Architects in training
The long process to transform the nature of education and professional practical experience in the Architecture profession following recent reports.
A people-first approach to retrofit
Moving away from the destructive paradigm of fabric-first.
International Electrician Day, 10 June 2025
Celebrating the role of electrical engineers from André-Marie Amperè, today and for the future.
New guide for clients launched at Houses of Parliament
'There has never been a more important time for clients to step up and ...ask the right questions'
The impact of recycled slate tiles
Innovation across the decades.
EPC changes for existing buildings
Changes and their context as the new RdSAP methodology comes into use from 15 June.