Rock Products

MAR 2013

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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LOADOUT TRANSPORTATION eration will be referenced to the same coordinate sys��� tem and pile limits each time the inventory is per��� formed. Faster Turnaround Speed was the key factor in Vic Coleman���s decision to use H2H���s mobile laser scanning system. Coleman is the CFO at Braen Stone, a New Jersey firm with more than 100 years of involvement in the aggregates indus��� try. Braen uses the physical inventory surveys for both internal and external financial audits. When Coleman first started doing quantity surveys his crews were averaging two sites per week. ���Using the H2H mobile laser scanning system we can do three sites in two days. The speed is remarkable and we have a high degree of confidence in the results,��� Coleman noted. He has seen three or four generations of tech��� nology, and is continually amazed at the pace of change. Coleman recalled, ���I remember when the field crews had to keep the batteries warm with their hands.��� Mobile laser scanning not only speeds up the data col��� lection portion of the workflow, but as compared to the use of aerial photogrammetry, it has led to much faster turnaround of the actual physical quantities. Using point cloud software supplied by the sensor manufac��� turer H2H can reduce the 3D data for that same 20,000 CY stockpile and compute the volumes in a matter of hours. Gary Wall, operations manager for Tilcon Connecticut, a leading supplier of quality crushed stone, hot mix as��� phalt and ready mix concrete throughout the state, noted that, ���H2H typically produces quantities within a couple of days of the survey. They have been providing an excellent overall service.��� that apply to stockpiles and other related facilities such as drawholes, bins, hoppers and surge piles. These reg��� ulations prohibit a worker from standing or walking on a pile when this may expose the person to a hazard. Other regulations require the construction of plat��� forms, staging or safety lines. Laser scanning eliminates the need for anyone to walk on a storage pile and can in the case of mobile scan��� ning keep the survey crew safely inside a vehicle. When the project requires the use of a tripod���mounted scanner the survey crew generally has the flexibility to select locations that are not in harm���s way. The use of mobile laser scanning as a standard method for inventorying aggregate stockpiles in the United States is being addressed by the ASTM ��� the American Society of Testing Materials International. Originally formed in 1904 Committee D05 on Coal and Coke is re��� sponsible for a variety of standards for this industry that have application to aggregate and mineral mining and storage as well. ASTM D6172 was originally developed to standardize photogrammetric measurement procedures for inven��� torying coal and coke stockpiles. Recognizing the im��� portance of laser scanning techniques, as well as GPS this standard is now in the process of being updated to include these game���changing technologies. Richard A. Hisert, Ph.D., principal and Trevor R. Thomas, P.E., are with H2H Associates LLC, based in Troy, N.Y., a consulting firm that provides geologic, hydrogeologic, construction, regulatory and environmental services to private and public clients. H2H began offering laser scanning services to the construction materials industry in 2008 in order to provide more efficient and accurate measuring of their physical inventories. In 2012, H2H visited 130 different sites throughout the Northeast but since the system is so portable they were also able to provide their services in Oklahoma, Missouri and Arkansas as well. In total they surveyed 4,250 stockpiles, averaging 200,000 cu. yd. per site and a total of 34 million cu. yd. inventoried. Improved Safety and Standards Site safety is another factor that leads companies to choose mobile laser scanning over other inventory methods. Wall noted, ���The use of laser scanning, in general, is a safer and more accurate method for inven��� torying stockpiles.��� Safety can be either prescribed in the form of govern��� ment regulations, or desired in the form of company policies that reduce liability, property damage and costly injuries. The U.S. Mine Safety and Health Admin��� istration (MSHA) has issued a number of regulations ROCKproducts ��� MARCH 2013 57

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