Crossbar A crossbar is a horizontal device on a transmission tower. Wonder Woman replaced a transmission cable, and lowered the new cable down to a linesman and he attaches it to the crossbar. References ↑ As seen in The Ultra Beam. ↑ As seen in The Ultra Beam. External Links Crossbar at Wikipedia Retrieved from "https://superfriends.fandom.com/wiki/Crossbar?oldid=45454" Categories: Equipment Community content is available under CC-BY-SA unless otherwise noted.