Noise from the metal delivery carts and pallet trucks of supermarkets has always been a problem in the heartland, as these supermarkets are often in close proximity to dwellings.
Some supermarket deliveries start as early as 4am daily.
My observation is that for the metal carts, the harder the wheels, for example, a rigid nylon castor wheel, the more sound and vibration will be created with the uneven flooring.
Polyurethane (PU) treaded wheels should be used, as these are able to carry sufficient loads and offer greater "noise reduction".
Although PU wheels provide less resistance, the supermarkets should consider using them as part of doing business in a socially responsible way and a way of improving the quality of life of residents.
Loong Chik Tong