We now have available 2 different Wall Chart versions: one with Chain Slings rated at a Design factor (DF) of 4:1 and one with Chain Slings rated at a DF of 5:1.
Note that Chain Slings with a DF of 4:1 are specified in ASME B30.9, ASTM A 952, NACM 2010, EN 818-4, the US OSHA and all other Canadian Provincial Health and Safety Acts (other than the exception of the construction industry in Ontario, as noted below).
The reason for having a second WLL Chart rating Chain Slings with a DF of 5:1 is that in Ontario the OHSA for Construction Projects demands it.
ALL other industries and applications are rated with a DF of 4:1.
In Quebec the Provincial Government published “Greage et Levage” which, to our understanding (and impossible to have this confirmed by any Quebec Governmental body) applies to the ENTIRE Quebec industry and also demands a Chain Sling DF of 5:1. This publication is a straight translation of the “Rigging Manual” originally published by the “Construction Safety Association of Ontario”. However the publisher, CSSST, missed the little detail that the original publication was intended for the CONSTRUCTION industry ONLY, while the same publication in Quebec now applies to the entire industry across Quebec.
Unirope can not give any recommendation anymore in Quebec as to “what is required by law”. As of 2014 most of Quebec enforcement seems to be oblivious to this, or they simply will enforce this “at will” while nearly ALL of our Quebec customers simply ignore the entire matter.
Any advice ? Give us a call.
For FREE printed versions DF 4:1 and DF 5:1 sized 46″ x 48″ Sling Capacity Wall Chart please call us or talk to your local Unirope® Rigging Consultant.