Riggers, crane operators, construction supervisors, and emergency responders were among some 50 people attending the recent I&I Sling Rigging Seminar in Dedham, Mass.
Held at the Holiday Inn March 7, the event consisted of lectures and demonstrations that covered rigging applications, theory and principles designed to promote more efficient and safer work places.
Mike Riggs, manager of the Knoxville, Tenn., branch of I&I Sling Inc., was the principle instructor for the seminar. A 28-year veteran of crane and rigging operations, Riggs spent 11 years as an Ironworker and Rigger, nine years in developing instructional courses in this field, and is currently training director for Slingmax Rigging Products.
Topics explained during the seminar included load control, sling capacity, sling loading, load weight calculations, and mobile crane hand signals.
Following a lunch provided by I&I Sling, the group traveled to the company's shop in Canton, Mass., to view a number of demonstrations, among them Flemish eye fabrication, synthetic web sling fabrication and round sling fabrication.
A highlight of the shop session was a breaking test of a sling with a nominal strength of 25,000 pounds. As part of this, attendees were given the weight and width of a test section of the TPXC2500 sling and asked to estimate the actual ultimate strength of the material as it was stressed by the company's test apparatus. The material broke at a 7:1 design factor — industry standards require 5:1.
Jim Kenny, a captain of the Warwick, R.I., Fire Department had the closest estimate and took home the prize — a $100 bill.