Which calculation involves dividing the length of a building by o.c.?

The calculation that involves dividing the length of a building by o.c. (on center) is typically associated with truss calculation formulas. In the context of trusses, o.c. refers to the spacing of the trusses that are spaced equally over the length of the building, which is necessary to determine the number of trusses required and how they will be positioned to support the roof effectively.

By dividing the total length of the building by the spacing of the trusses, you can establish how many trusses are needed. This calculation is crucial for both structural integrity and materials estimation, ensuring that the design will be able to support the loads expected on the roof while also optimizing material use and ensuring compliance with building codes.

Calculating roof pitch relates to the slope of the roof and does not involve this division. Determining the slope of the truss also focuses on angles and does not require length divided by o.c. Similarly, the total length of roofing material would involve different calculations that take into account the area of the roof and its dimensions rather than spacing of supporting trusses.