Inquiry (采购产品): roof crane Do you have a jib or winch crane that can be mounted on a roof ? Hook to base dimension of 8 ft or more boom length of 7 ft or more drop below crane base of 30 ft. 500 lb capacity. **** Hidden Message ***** Emily Wilkins OH 45208 USA Company: Hixson Title: Engineer Phone: 513-241-1230 E-mail: ewilkins@hixson-inc.com **** Hidden Message ***** ewilkins@hixson-inc.com