When a metal-plate-connected wood roof truss system collapses while under construction there is a need to evaluate why the collapse occurred. If there are multiple interested parties, there are generally multiple engineers involved in investigating the cause of the collapse. In most cases, at least one of the engineers involved will reach the conclusion that the truss system was not adequately braced. In many cases engineers that reach that conclusion end their investigation into the cause of the collapse at that point and conclude that the collapse was due to a lack of adequate bracing. That conclusion is often incorrect. Several examples of roof trusses that were successfully constructed without bracing that conforms to the current Building Component Safety Information guidelines illustrate that a lack of such bracing should not be assumed to be the cause of a truss collapse-but it could be! Sometimes, the bracing installed prior to the collapse, while perhaps not in perfect conformance with the applicable guidelines, is very substantial. Examples of well braced truss system collapses are reviewed to illustrate how other, equally important factors can contribute to truss collapses. When evaluating a truss system collapse it is important to evaluate all of the possible causes before drawing conclusions about the cause of the collapse. Concluding that the truss bracing did not conform to a particular guideline or design is not by itself adequate justification for concluding that inadequate bracing was the cause of the collapse. It is not that simple. Inadequately braced truss systems that have stood for years or decades are sometimes discovered in a pre-collapse condition. Often, it is feasible to repair resultant damages and install appropriate bracing to restore the roof truss system to a functional and safe condition. A few examples of such truss repairs are reviewed.