Abstract: A tubular wall member useful for the erection of building structures comprises an end connector inserted into the open ends of a hollow tubular member. The end connector provides a flat, substantially circular front end portion and a rearward extending body portion comprising two spaced, matchingly notched, parallel plates. Tabs rearwardly extending from the periphery of the circular front end of the connector are provided with the rear end portion thereof bent upwardly and forward so that when the front of the end connector is inserted into the open end of the tubular member, the bent tabs contact the end of the tubular member.