Nope, when those symbols aren't used in writing for quotations, these represent feet and inches. The symbol ' represents feet. So 8' which is on the picture you provided means 8 feet. The " represents inches. So the 12" on the picture means 12 inches.
In further detail, this also means that the Angle ROT is equal to 62 degrees and has a total length of 8 feet and 12 inches (most likely not to scale).
Hope this helps! :)
