Parent company J&T Blacksmiths is also now in the hands of Begbies Traynor who are seeking a buyer for the business.
More than 40 staff have been kept on while Begbies listen to offers.
J&T Blacksmiths was established in 1979 and provides steel works to major contractors and utility companies.
Its fully-owned subsidiary William Crawford and Son (Contractors) Ltd worked closely with J&T Blacksmiths Ltd on construction, repair and maintenance contracts.
Joint administrator Paul Dounis said: “We are continuing to trade the businesses and continue to provide an ongoing service to existing customers that include major contractors.
“A quick sale will be needed to enable the businesses to continue to win future contracts and maintain sales revenues.”
He added: “We are unable to make any guarantees regarding how long jobs will remain viable until we secure a buyer for the firms, but we are making every effort to secure a return for the creditors and secure a future for the businesses and their staff.”