The California chapter of the Sheet Metal and Air-Conditioning Contractors’ National Association took time from its May 15 annual convention in Indian Wells, Calif., to recognize the work of its members.
Control Air North Inc. in Hayward, Calif., and a member of Bay Area SMACNA, was presented with the 2012 Tom Guilfoy Memorial Craftsmanship of the Year Award in the mechanical category. The company worked on the Li Ka-Shing Center for Biomechanical and Health Sciences Program at U.C. Berkeley in Berkeley, Calif.
According to the chapter, the Tom Guilfoy Award is presented annually to a project where attention to detail and expertise were critical, as well as teamwork among sheet metal workers, contractors and owners.
This design-assist, lean-construction project of 210,000 gross square feet consists of six levels of research and teaching laboratories, as well as lecture halls and seminar facilities. It also provides highly specialized areas for instrumentation and containment spaces to handle viruses and stem cell cultures. Lean-construction techniques and sustainable-environment design features for energy efficiency were integrated throughout the project.
In the course of the project, over 3,600 requests for information and 211 supplemental instructions were issued. The magnitude of changes resulted in a 94 percent increase to the contract value, while only adding a few months to the project schedule. The project required over 70,000 sheet metal detailing, fabrication and installation hours to complete.
In order to incorporate the essential systems and amenities, 3-D coordination required multiple disciplines to handle the structural, mechanical, electrical, plumbing, fire protection and architectural systems. Total sign-off of the coordinated drawings mitigated nearly all trade conflicts and associated costs during the construction phase.
Brady Air Conditioning in South San Francisco, Calif., and a member of Bay Area SMACNA, also earned the Tom Guilfoy Memorial Craftsmanship of the Year Award in the architectural category. The award was for their work on the 1905 Samuel Murphy Windmill historical restoration in Golden Gate Park in San Francisco.
The Dutch-style windmill is one of the largest in the world, standing over 10 stories tall. Brady Air Conditioning was commissioned to fabricate and install the copper locking panels to cover the restored dome.
The dome is an elliptical-shaped octagon so all the sides are not equal. The unique shape of the dome created a set of challenges in the fabrication process and installation of the locking panels. About 3,500 pounds of copper in 16-, 20- and 32-ounce gauges were used.
At the base of the dome there is a 20-ounce copper inlay gutter that ties into the first row of flat-locking, plumb panels. The next five rows of flat-locking panels pitch inward about 10 degrees, creating some tapered panels. The following six rows of flat-locking panels pitch inward about 60 degrees coming to a center point, creating even more extensive tapered panels. One of the eight sides has a dormer that rises above the peak creating more custom flat-locking panels. All the valley, ridge cap, door, window, stock and tail flashing interlock with the panels, requiring several hand-formed lock seams.
The 64-ton dome was placed on top of the windmill Sept. 12, 2011. Once the dome was installed the contractor added a 20-inch-wide, 32-ounce copper skirt covering the turning ring at the base of the dome. The installation of the skirt was performed from a basket suspended from a crane.
The project took 1,992 man hours and their shop fabricated 291 copper panels.