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Trucks and Haulers
Published in John E. Schaufelberger, Giovanni C. Migliaccio, Construction Equipment Management, 2019
John E. Schaufelberger, Giovanni C. Migliaccio
On-highway trucks and haulers must comply with gross vehicle weight, axle loading, and width limitations imposed by state highway departments. On-highway end-dump trucks typically have load capacities of 5 to 12 loose cubic yards. On-highway bottom-dump haulers may have load capacities up to 30 loose cubic yards. Off-highway trucks and haulers can be larger than on-highway types because they do not need to comply with state-imposed restrictions for highway use. As with scrapers, the condition of the haul road will significantly affect the productivity of off-highway trucks and haulers.
Impact force modelling for whole body vibration exposure during high impact multi-pass shovel loading operation
Published in International Journal of Mining, Reclamation and Environment, 2021
Large dump trucks are used in conjunction with large capacity shovels to gain economic advantages in large scale surface mining operations. When these shovels load dump trucks with over 100-ton pass under gravity, large impact force is developed, which results in high frequency shock waves. The shockwaves generated, under high impact shovel loading operations (HISLO), propagate through the truck body and chassis to the operator’s cabin and seat, exposing the operator’s feet, legs, lower back, hands, spine, and neck to high frequency shockwaves. These experience and exposure are termed as whole body vibration (WBV) phenomenon. Whole body vibration levels exceeding the recommended ISO limits (Table 1), as specified under sections 1, 2, 4, and 5 of ISO 2631 [1–4], can have severe impact on the health and safety of operators, including long-term lower-back problems and various other health issues [5,6].