A “ga -enwerịrị” maka ịkwanye na ibudata trailers n'enweghị nsogbu.
Zute nkọwapụta OSHA na ụdị dịgasị iche iche nke Trailer Stabilizing Jacks OSHA 1910.178 (k) (3) na-ekwu “Jakị nwere ike ịdị mkpa iji kwado ọkara ihe na-adọkpụ ma gbochie ịkwalite n'oge ị na-ebugo ma ọ bụ na-ebutu ya mgbe ejikọtaghị traktọ na traktọ” .