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Show HILLTOP TIMES PRODUCED BY August 12,2010 The 3/4 inch plywood target at the end of the range fronts a steel-clad concrete area to capture the bullets. Design elements in the area behind the target mounting area also help dampen the forces generated. RANGE From page 6 constructed. The muffler (or silencer) was designed to emulate the range surrounding it, so as to funnel and break up the sound and pressure, in the same manner as the range. The muffler has 12 inch thick walls and a 10 inch thick ceiling that are filed with a special acoustical insulation (which also lines the range walls) and several screens that keep insulation from being torn apart from the shock waves and prevent harm from coming to the expensive parts that comprise the gun, its motor and associated hardware. It:took testing and one remodel of the muffler to reduce the pressure produced by the 30 mm gun from 100 psi to an acceptable 3 psi. Through trial and error, it was discovered that a row of tires hung in the third stage of tbe muffler was effective iiHielping to reduce noise arid the shock wave. The tfces are hung by chains that are secured by I bolts. The force generated from a test fire was so great that the open-ended I bolts actually straightened out, which posed a safety risk. Beefier and enclosed I bolts had to be installed. ; - ,When the gun is fired it;Is aimed at a target mounted on 3A inch plywood, at the end of tfie range. Bullets from the 30 mm gun have no trouble punching through the plywood into a chamber of steel clad concrete filled with gravel to capture the bullets. Periodically, the gravel in the bullet trap, which extends for 80 feet needs to be replaced. This is done by removing the 6x6 timbers tyhich hold the gravel in place, then removing the gravel that is filled with slugs. The timbers are then replaced and the gravel refilled through ports that are accessible from the top exterior of the building. To deal with the pol- Courtesy photo lution issue the team installed a powerful filtered air exchange system that was designed and has proven to exchange all of the air with the room in five minutes. Numerous safeguards were installed in the range to ensure that no one would be in the room when the gun fired. In . the next room is a control complex. No gun can be fired until safety checks are made and the range is empty. Motion detectors inside the range will shut down firing if motion is detected in the range. Video cameras in the range also feed into the control room as an additional safety measure. They also record the firing. "There's no telling what would happen to a person inside the range when firing was going on," said Redeen. "I don't think any of us are anxious to find out." HHI Corporation was hired through the design/ build mechanism, rather than the customary competitive bidding process. "Design/build is much faster," Redeen said. "The emphasis is on contractors who have a solid track record. And, during the process, the contractor can talk with customers, which is a much more responsive way of doing business. There's no other way we could have done this. We made so many changes to the design that the final structure was much different than what had been originally envisioned. Design/ build gave us the flexibility we needed and allowed the contractor to be more innovative." The building was completed in less than two years for approximately $7 million, not a bad price for such a high tech facility. From the outside, it's an innocuous building — there is no clue as to its function. Best Buffet North of the Border!!! (Since 1976) MANUEL'S August 10,2010 • 4:30-7 p.m. Weber State University Davis {2750 N. university Park Blvd., Layton) In Fall 2010, Weber State University will offer a new bachelor's degree program in electronics engineering. Learn more about the program during our question and answer sessions, where you'll hear from professors and the dean of the College of Applied Science & Technology. 1st Question & Answer Session: 4:30 p.m. 2nd Question & Answer Session: 6:00 p.m. Enter to win drawings for ': a TI-89 calculator or 2 season football tickets! Light refreshments served. To learn more, visit WEBER.EDU/EE RESTAURANT & CANTINA 1145 South State, Clearfield 773-7579 www.el-burrito.com • Saturday buzz cuts m ^5 H^ We treat heart attack patients raster than anyone WBv1 else in Utah. Which means more lives saved, and more Saturdays at the barber with your grandson. Intermountain Heart & Vascular Services •Vis healingforlife.com .••^ MCKAY-DEE HOSPITAL CENTER LOGAN REGIONAL HOSPITAL • INTERMOUNTA1N MEDICAL CENTER ARY CHILDREN'S MEDICAL CENTER • LDS HOSPITAL • ALTA VIEW HOSPITAL . RIVERTON HOSPITAL • UTAH VALLEY REGIONAL MEDICAL CENTER ,; DIXIE REGIONAL MEDICAL CENTER • • VALLEY VIEW MEDICAL CENTER BEARRIVERVALLEY HOSPITAL |