Plant Services - September 2007 - (Page 27) Roof-top view shows a primary clear-span structural member being placed over the existing building prior to receiving wall panels and roof cladding. tems included a 22-gauge Robertson SSR standing-seam metal roof system, which has a UL-90 Wind Uplift rating and Factory Mutual approval as a Class 1 roof panel. Wall construction used 6-in.-thick, 3/4-lb.-density fiberglass mat with an integral factory-applied vapor barrier between 26gauge exterior metal wall panels, and a white 29-gauge roof liner panel system added dust control. The contractor used a 400-ton mobile crane fitted with 250 ft. of boom to set the new structural steel over the existing building. Tolerances were critical. At some points, the new columns between existing joists had only 3 in. of space on each side, and one left only 1/4 in. of clearance between the column face and an existing wall. “Robertson steel systems had absolutely zero fabrication errors,” recounts Tony Naccarato, principal, MCG Joint Ventures. “The quality was extremely impressive.” The new construction’s 10 ft. to 12 ft. higher vertical clearance allowed construction crews to work off the flat roof of the existing structure in a temporary “attic space” under the new roof. The space and firm footing was especially beneficial while installing the fire-sprinkler system, better air exchangers, and energy-efficient 400-W metal halide lighting that increased illumination to 48 ft.-candles on the production floor. The now metal-lined walls are insulated to R-20 and prevent the sawdust buildup of the past. To other plant operators considering similar construction at plants with around-the-clock operations, “Planning and thorough preparation up front are absolutely critical,” Lewis advises. “Using engineered steel building systems enabled us to clear-span the whole area. Other construction might not have allowed it within a reasonable cost.” The project demonstrates that quality-controlled materials, logical construction phasing and overall project management can allow a construction project to proceed even in immediate proximity to plant production lines. September 2007 See it all work together at Alemite.com/systems www.Alemite.com www.PLANTSERVICES.com 1890_07ALE330AS_2_PS.indd 1 5/15/07 9:25:55 AM 27 07ALE330 http://Alemite.com/systems http://www.Alemite.com http://www.PLANTSERVICES.com
For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.