What does On-Center Trusses refer to?

On-Center Trusses refers to the spacing between trusses for installation, which is a crucial aspect in construction and structural design. This term typically indicates the distance measured from the center of one truss to the center of the next. This measurement is important because it determines how the load is distributed across the trusses and affects the overall stability of the roof or other structures. Proper spacing must be maintained to ensure that weight is evenly distributed and to meet building codes and safety standards.

In contrast, other options do not accurately define On-Center Trusses. The term does not refer to every second truss in a row, which implies a specific selection rather than a measurement of spacing. Additionally, while distance is a relevant concept, it is vague and not specific enough to capture what "on-center" signifies in this context. Lastly, the statement about complete removal and installation of materials is unrelated to the concept of truss spacing and does not pertain to the measurement or configuration of trusses.