Collar ties, contrary to popular belief, do not prevent walls from spreading. roof was interrupted about a foot above head height by a series of horizon- tal two-by-sixes connecting pairs of rafters.Where they are required, they should be installed on every other rafter where rafters are on 24-inch centers.Collar ties are probably not needed if approved metal connectors were used to fasten the rafters to the ridge.Collar ties are in the upper 1/3 of the roof. Ridge straps are permitted to replace collar ties. Tim Carter talks about rafters, rafter ties, and collar ties. InterNACHI inspectors should not call out a lack of collar ties as a defect unless they know that collar ties were required in the jurisdiction where the home is located at the time the home was built. A collar tie is a tension tie in the upper third of opposing gable rafters that is intended to resist rafter separation from the ridge beam during periods of unbalanced loads, such as that caused by wind uplift, or unbalanced roof loads from snow. ![]()
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