• Home

    • Book of Giants

    CONTRACTOR's Top 100 mechanical contractors and who they are

    Recent

    Rasmussen Mechanical
    Tube repair.
    April 22, 2025
    Photo 201218181 © Pramote Polyamate | Dreamstime.com
    UMC
    Haberberger
    A Haberberger technician welds a section of cast iron pipe at the company's new piping facility.
    April 28, 2023
    Southland Industries
    The new Central Records Complex (CRC) located in Winchester, Virginia.
    Harris Co.
    A large prefabricated piping assembly for the Minneapolis Bus Garage job. Note the worker in back for scale.
    Photo 79465229 © Prasit Rodphan | Dreamstime.com
    Dreamstime S 79465229
    McKinstry
    210929 1930 Boren 017

    Highlights

    TDIndustries
    Block 185, still under construction, is attempting to achieve a LEED Gold Rating under LEED v4 for BD+C: Core and Shell.
    Dec. 16, 2021
    Set to open in May 2022, Block 185, with its sail-inspired exterior design, will become downtown Austin’s tallest office tower.
    John W. Danforth Co.
    Buffalo Welding Shop
    May 7, 2021
    Our Giants have responded, adapted, and in many cases found new pathways to success.
    Cannistraro
    Img 4919 Promo
    May 3, 2021
    As the nation emerges from the pandemic our Giants have embraced new technology and invested in their people while continuing to deliver essential services for their clients.
    Four of TDI's employee-partners. Phot: TDIndustries
    Wic Week Updated
    March 10, 2021
    The company is highlighting women in the industry throughout March.
    From left to right, Jones, Lackey and Haberberger. Photo: Haberberger, Inc.
    Kyle Jones Rick Lakey Sam Haberberger
    March 8, 2021
    The mechanical contractor welcomes Rich Lackey, Sam Haberberger and Kyle Jones.
    Harris Logo
    Feb. 1, 2021
    Honor highlights people-centered culture and reflects employee initiatives.
    Baker Group (2).jpg
    June 28, 2019
    Baker Group's new, 144,000 square-foot prefabrication facility contains offices as well as manufacturing space.
    msan10 / iStock / Getty Images Plus
    JamesBondish.jpg
    May 31, 2019
    Not one of the 100 companies on our Book of Giants list got there by resting on their laurels.
    DunbarMechanical_logo.jpg
    May 30, 2019
    Limbach’s September press release announced their plans to acquire Dunbar Mechanical; the sale agreement was not executed.
    Awards Team.jpg
    May 23, 2019
    The award comes on the heels of UMC winning the National 1st Place MCAA/CNA Safety Excellence Award in their category for the second year in a row.