When laying out the branch line restraints along branch lines that are part of a grid, do you space the restraints from one head onward, or do you consider the connection to the main at both ends the end of a line and both heads at the "end" need to be restrained?
The branch lines are 2" the mains are 3" and 4"
The length of the branch lines between the mains is approximately 200'-0"
The branch lines are hung 21" below the deck with a top beam clamp, 3/8" A.T.R. and a hanger strap.
Regarding NFPA 13 2010, 9.3.6 Restraint of Branch Lines. I have a few questions.
If you are working with branch lines attached at both ends by a main (grid) which is restrained laterally and longitudinally by sway bracing in accordance with the code, do you have to restrain the branch lines...