provides an even greater benefit: consis-tent clearance. Every quarry has a number of overhead obstacles. Room height, legacy structures, bridges, conveyors and other equipment can all make access difficult – or impossible – for traditional end-dump bodies. In situations where height restrictions rule out raising an end-dump body – such as offloading materials inside a building, near existing structures or underground – operators must rely on loaders and other smaller support equipment to move materials, which significantly reduces efficiency for these tasks. Additionally, operations that use end-dump haul trucks risk accidents while moving around low-clearance structures if the bodies are not completely lowered every time. A rear-eject body, however, removes the height variable, allowing operators to safely access limited-clearance areas and maneuver around the quarry. This boosts productivity for applications like reclamation, where large amounts of material need to be moved. Now, producers are able to quickly deposit overburden materials right where they need them – without worrying about lifting the body of the truck. This saves valuable time and can increase efficiency for these support tasks by up to 25 percent. EVEN SPREAD In addition to opening up access to more areas of the quarry, rear-eject haul trucks can also increase efficiency for tasks where materials need to be evenly and precisely distributed, such as haul road maintenance or certain drying applica-tions like spreading salt, diatomaceous earth or lime onto leech beds. Rear-eject bodies provide the operator with complete control of discharge and the ability to dump materials on the go – something highly discouraged with end-dump trucks due to increased safety risks such as tipping or material bridging. The ejector blade pushes material out pitandquarry.com of the truck body at a steady rate, even while the vehicle is moving, offering a uniform distribution of material to fall behind the truck. For haul road maintenance, especially, rear-eject bodies offer optimized pro-ductivity. Traditional methods involve carefully trying to meter out aggregate with a loader from a large pile. This tends to leave an uneven spread of material that needs to be smoothed either by the loader or additional support equipment. In the winter, when icy haul roads occur and grit must be regularly applied From heavy-duty scalping to fines, and everything in between. Count on Unified. ★ Manufactured in the U.S. ★ Custom opening sizes available ★ Full line of installation parts 14 manufacturing and service locations across the country. Family-owned and operated for 150 years. www.unifiedscreening.com February 2021 PIT&QUARRY 29
Pit & Quarry February 2021: Page 29
