Both firms will work alongside Elliott Thomas subsidiaries Taylor's Hoists and joinery firm Rainsford Contracts.
The quartet will operate under the Specialist Contractor Group name.
An spokesman said: "There are a lot of synergies between the companies and advantages in bidding for work together.
"We can offer clients a complete package, which will hopefully prove attractive. We will also be able to bid for larger projects and share overheads like marketing and insurance."
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