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Note: the effective working length (EWL) of a Robur sling will not differ more than 3% of the nominal
length indicated in the previous tables.
Definitions:
• Working load limit (WLL): the maximum load a websling has been designed to support when
pulled straight and a sling is allowed to support during ordinary lifting operations (see Table A).
• Nominal length (L): specific length of the sling, from bearing point to bearing point.
• Effective working length (EWL): actual length of the sling from bearing point to bearing point.
• Modal factor: factor applied to the working load limit (WLL) of a websling to get to the maximum
working load for a certain assembly or operation mode.
• Safety coefficient: guaranteed minimum breaking load to working load limit ratio. In this item it is
7.
• Inspection: visual testing of the state of the websling, to check for clear damage or wear which may
affect its use.
• Trained person: a designated, suitably trained person who has proper know-how and practical
expertise and has been given the instructions needed to perform any required tests and examinations.
The accessory is subjected to several stringent spot checks for serviceability, performance and
compliance with UNI EN 1492-1 at the manufacturer's.
The number of samples and the related sampling plans are chosen according to the characteristic to test
under stringent internal procedures, and the results are filed in the quality department of the factory in
Sulmona.
Division of BETA UTENSILI SPA, Via Volta, 18 - 20845 SOVICO (MB) ITALY Tel. +39.(0)39.20771-Fax + 39.(0)39.2010742
2)
TESTING SPECIFICATIONS
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