Single and double sided Tooth Plate Connectors are for improving bolt performance in timber. Timber Connectors are easily installed devices for improving the efficiency of timber structures. They increase the joist strength, reduce the size of member required for a given load, and simplify fabrication and erection. The use of connectors in timber structures can make it possible to develop the full allowable load of the members connected and in some circumstances, make a joist stronger than the members themselves.