Concrete Products

FEB 2017

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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Page 36 of 95 February 2017 • 35 NEWS SCOPE PRECAST Architectural and structural precast producer Clark Pacific and the City of Roseville, Calif., have announced U.S. Resiliency Council (USRC) Platinum level accreditation for the Roseville City Hall Annex. The new 82,000-sq.- ft. structure incorporates the Precast Hybrid Moment Frame, engineered to be self-cen- tering after seismic event exposure and limit design drift to under 1.25 percent, thereby reducing owner and occupant recovery time. The highest USRC rating, Platinum pre- dicts the consequences of an earthquake on a building, as well as the cost and time of struc- tural recovery and repair. Roseville officials opted for the frame because it gave the archi- tect flexibility in the design; met tight deliv- ery requirements to meet tenant deadlines; and, assured that during a seismic event, crit- ical operations and services would be housed in a resilient structure. "The decision to use precast was import- ant both on the front end and back end. We wanted to make sure we were driving value on the construction costs, getting the most for our money but also on the long-term mainte- nance costs," affirms Roseville City Develop- ment Services Manager Mike Isom. "This is the most prominent building on the town square and it was important that we had an archi- tectural look and finish that would stand the test of time and truly be a hallmark for our downtown." Clark Pacific has tailored the Precast Hybrid Moment Frame system for 10 past projects, and enlisted Sacramento-based Buehler and Buehler Structural Engineers to incorporate the frame and its lateral design for the Rose- ville City Hall Annex. Clark Pacific was among contributors to post-Northridge Earthquake, National Insti- tute of Standards and Technology-backed research, development and testing that positioned the Precast Hybrid Moment Frame in model building codes. The producer fab- ricated 538 panels in 10 weeks starting in early January 2016, and erected the City Hall Annex in 39 days. The precast schedule included columns, beams, walls, and floor system accounting for 82,944 square feet of concrete. The facade doubles as a regular and redundant structural system. USRC launched in late-2015 as a 501(c)3 nonprofit organization to establish and implement a rating system for buildings with- standing natural hazards. It initially applies to earthquake performance, but Council members envision the system eventually addressing wind, flood and blast exposure. Conventional sweep elbow blowouts cause ongoing system shutdowns. 45° and 90° elbows available in diameters from 1.25 to 18 inch, with flanges and socket-weld ends in tube, Schedule 10/40 and Schedule 80 pipe, in cast iron, carbon steel, aluminum, stainless steel and specialized alloys depending on diameter. ABRASIVE CONCRETE MATERIALS BLOWING OUT YOUR PNEUMATIC CONVEYING ELBOWS? Prevent elbow failure by preventing material impact Unlike conventional "impact" elbows and "plugged-tee" elbows that rely on material impact to change direction, HammerTek's Smart Elbow design features a spherical chamber that protrudes partially beyond the desired 90º or 45º pathway. This causes a ball of material suspended in air to rotate— in the same direction as the air stream that powers it—gently deflecting incoming material around the bend without hitting the elbow wall. ® Ask for a Free, No-Risk Trial Offer 1-610-814-2273 Prevent elbow wear, blow-outs, recurring maintenance and shutdowns once and for all with Smart Elbow ® deflection elbows from HammerTek ® Lime, clay, sand, alumina, iron oxide, fly ash, granite, cement, shale, slag, clinker, cinders, aggregates and other abrasives wear through conventional sweep elbows because material must hit the elbow wall at high speed to change direction. Instead, the Smart Elbow design gently deflects material around the bend without impacting the elbow wall, providing concrete producers with three important benefits: Virtually no elbow wear, blowouts, replacement costs or related downtime Virtually no material degradation, reducing dust generation Reduced space requirements—about 40% shorter than sweep elbows 1 2 3 Smart Elbow deflection elbows at concrete plants still going strong after 15 years. EE-1024

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