Long Boom, Big Power with Creature Comforts The GR-1000EX-4 holds the crown for the longest boom in the 100 t class. This crane boasts a 167 ft / 50.9m full power main boom and more counterweight than its little brother to give the operator the best possible chart and radius in the smallest package. This newly-redesigned rough terrain crane also sports creature comforts for the operator such as a tilting cabin, a side ladder that transforms into steps for better access and egress, and even USB chargers.