What does O.C. in truss measurement refer to?

In truss measurement, "O.C." refers to "On Center." This term is commonly used in construction and design to indicate that measurements or spacing of structural elements, such as trusses or framing members, are made from the center of one element to the center of the next. For example, if trusses are spaced 24 inches O.C., it means that the distance between the center of one truss to the center of the next truss is 24 inches. This method is important for ensuring uniformity and structural integrity in building designs, as it takes into account the width of the members being used.

Other choices, while they may seem plausible, do not align with standard terminology used in the context of truss measurements. "Overall Coverage" does not specifically convey the necessary information about spacing, "Outside Corner" refers to a geometric detail rather than spacing, and "Open Configuration" pertains to structural design rather than specific measurement methods. Thus, selecting "On Center" accurately reflects the industry standard practice in truss measurement.