The deal is the latest step in the firm’s strategy to expand its international operations.
CMC is one of the leading resellers of formwork and shoring solutions in the USA, primarily serving the civil engineering markets in Texas, Colorado and California, and has been a customer of Equipment Services since 2004.
The company had a turnover of £11.2m during the last 12 months.
Steven Dance, Managing Director of RMD Kwikform said: “This acquisition expands the Group’s international footprint and provides an attractive growth opportunity for our Equipment Services division at a price that we believe represents excellent value for shareholders.
“We are excited by the opportunity to leverage our expertise and experience within Equipment Services to generate significant growth in the US over the coming years.”