The repair and modification of metal plate connected wood trusses can be a very complicated subject, because each situation must be analyzed individually. Common situations that require repairs include: damage to the truss from storage and delivery, handling, installation, adverse environments, fire, and manufacturing mistakes. Whatever the reason for a repair, the principles followed by the Truss Designer are similar. The truss repair must result in a truss that is able to carry all loads intended for the truss. This guide will cover the key concepts involved with a truss repair.