Abstract: A concrete panel is provided having a threaded cylindrical concrete insert imbedded therein for receipt of a bolt. Preferably, the concrete inserts are imbedded in each corner of the panel. The inserts have an opening on at least one end thereof for receipt of a securing bolt after they have been imbedded in the concrete panel. Each insert has a passageway which allows a reinforcing bar to pass through the cylindrical insert. The concrete inserts can extend the entire thickness of the panel and the cylindrical bore opens on both sides of the panel. As a result the panel can be secured from either side during construction of a building. The panel can then be made with one style or configuration on one side and a different style on the other side. Thus, two different style buildings can be constructed from the panels.

Abstract: A pre-fabricated cement or concrete panel and an improved system for building construction using such panels is provided. The concrete panel has a threaded tubular connector (concrete insert) imbedded therein for receipt of a bolt. The tubular connector has a head portion, a spaced flange portion and a tubular bolt receiving body portion for receipt of the securing bolt. The flange is securely attached to the tubular bolt receiving body by any convenient method such as welding or crimping. Reinforcement bars are imbedded in the panels on each side adjacent to the periphery of the panel. The flange is placed at a predetermined position between the head and the open end of the bolt receiving body. The predetermined distance between the flange and the head is dependent on the diameter of the reinforcement bars.