Attendees are told about the opportunities available to help deliver the venues and infrastructure for the London 2012 games.
The roadshow, run by Constructing Excellence, has held events in Newcastle, Belfast, Melton Mowbray, Bristol and Gatwick. In the next three months it will visit Scotland, Manchester, Leeds, Wales, Birmingham and London.
ODA chief executive David Higgins said: “This is an unprecedented challenge, particularly given the highly competitive construction market, so we are getting around the country and engaging with businesses of all sizes.
“The appetite and excitement from companies that want to be part of meeting this challenge is hugely encouraging.”