Maximum possible pipe lengths in bar joists
Maximum possible pipe lengths in bar joists
(OP)
This came out of an old Automatic Sprinkler or Grinnell designers handbook back in the days when mostly everything was threaded and pipe scheduled.
It was an easy to use formula for estimating the maximum length of pipe able to fit in a bar joist. You had to know joist centers, total depth and thickness of upper and lower joist chord members.
I remember this worked rather well adn for the life of me I can't find it or remember exactly what it was.
Anyone?
It was an easy to use formula for estimating the maximum length of pipe able to fit in a bar joist. You had to know joist centers, total depth and thickness of upper and lower joist chord members.
I remember this worked rather well adn for the life of me I can't find it or remember exactly what it was.
Anyone?





RE: Maximum possible pipe lengths in bar joists
RE: Maximum possible pipe lengths in bar joists
if your not sure just draw up a quick section and example pipe to see how it would fit
RE: Maximum possible pipe lengths in bar joists
If I remember correctly, it is the joist depth (in) / 6 * joist spacing (ft)
So, If you have 24" deep joists at 4'-6" on center, you could have 24/6*4.5 or an 18' stick of pipe would go through the joists.
This at least got me in the ballpark and I never had fitters call me and say they couldn't get the piping through the joists that I sent out.
I know this doesn't take into account the chord depth. It was just something an old sprinkler guy taught me when i got started almost 20 years ago.
Travis
RE: Maximum possible pipe lengths in bar joists
So, If you have 24" deep joists at 4'-6" on center, you could have 24/6*4.5 or an 18' stick of pipe would go through the joists.
This at least got me in the ballpark and I never had fitters call me and say they couldn't get the piping through the joists that I sent out.
I know this doesn't take into account the chord depth. It was just something an old sprinkler guy taught me when i got started almost 20 years ago."
That's it!
Thanks.