Slings
Slings are devices that do not belong to the hoist and that establish a connection between the suspension element and the load or the suspension element and the load handling device . Slings are also known as hangers .
Stop means can ropes , chains , lifting slings , lifting belt slings , round slings (including slip called) and releasable connection parts such. B. be shackles or swivels . The maximum permissible load capacity , which must not be exceeded, is indicated on all lifting accessories . Only components according to DIN EN 818 are marked with the nominal size and the quality class.
Dimensioning
Lifting equipment and slings must be designed and adequately dimensioned in accordance with the particular hazards during operation and the loads that occur during operation .
There are regulations of the professional association for the dimensioning of lifting gear .
In the ( DGUV ) Regulation 17 Event and Production Facilities for Scenic Representation (BGV-C1) there is § 9: Slings, such as ropes and straps, may not be loaded with more than one twelfth of the calculated breaking force . Other lifting accessories may be loaded with a maximum of 0.5 times the load capacity (WLL) specified by the manufacturer . You can also read there that when attaching portable hoists or lattice girders (trusses) with ropes or straps made of natural or synthetic fibers, a steel cable must be used as a safety device.
Safety rules
Slings must be subjected to a visual inspection before each use .
Above all, ropes and lifting straps must not be pulled unprotected over sharp edges of the load when being attached; they could be damaged and tear. A sharp edge is an edge radius that is smaller than the diameter of the rope or the thickness of the lifting strap or chain. Suitable edge protection is z. B. Polyurethane with a thickness of at least 5 mm or a lining with non-flammable or hardly flammable materials. Lifting gear should be stored dry and airy, protected from the weather and aggressive substances.
They must be checked by experts at least once a year ; this check must be documented in a suitable manner. This is also necessary after repairs. In the case of certain types of damage (e.g. broken stranded wire, incisions in fabric and worn chain links), the discard status has been reached and the lifting gear must be disposed of. Sling gear without manufacturer identification and load capacity information can also be discarded. A chain sling with no load capacity tag may only be used when there is recurring on individual chain links is an identifier, thus allowing conclusions to the manufacturer and to the quality of the chain material. Otherwise it may no longer be used as a sling, as it cannot be ruled out that it is of poor quality.
Individual evidence
- ↑ BGR 500 Operation of work equipment, Chapter 2.8 ( Memento from January 15, 2015 in the Internet Archive ), Operation of load-bearing devices in hoist operation, point 4
- ↑ BGV C1 , event and production facilities for scenic representation from April 1, 1998
Web links
- DGUV Information Attackers (accessed on July 10, 2020)
- Attaching loads (accessed on July 10, 2020)
- Lifting equipment and slings (accessed on July 10, 2020)
- Attaching loads Lifting equipment (accessed on July 10, 2020)
- Attachment and lashing equipment (accessed on July 10, 2020)