What should an operator refrain from if safety chains are not attached?

An operator should refrain from drawing a semi-trailer if safety chains are not attached because these chains play a crucial role in ensuring the trailer remains securely connected to the towing vehicle. Safety chains are designed to provide an additional layer of security in case the primary hitch fails; they prevent the trailer from detaching completely and reduce the risk of accidents. When operating a semi-trailer, the weight and size increase significantly, which emphasizes the importance of proper connection mechanisms. Without safety chains, the risk of a semi-trailer becoming disconnected while in motion is heightened, leading to potentially severe consequences, including accidents, injuries, and damage to property. Therefore, safety protocols dictate that one should not attempt to operate a semi-trailer under these unsafe conditions.