suspended waste line over creek
suspended waste line over creek
(OP)
Need to suspend a septic waste line over a creek about 90 feet. Want to use pvc (a painted ("pvc can not be exposed to direct sunlight") outer 3-4" line around an interior supply 1 1/2" line) I can find (and also calculate) the maximum support points for the pvc in tables (plumbing code), probably 4 ft. conservative. Want to use a steel cable and come along system. Can not find any good references for any wind calc analsyis. I can not figure any reason to put a heavy metal pipe around the supply line, (painting pvc should take care of the uv exposure despite the building official finding the quote "pvc shall not be exposed to direct sunlight" in the plumbing code.





RE: suspended waste line over creek
If you have wind velocity and air density then:
P=1/2 pV^2
in which P=pressure, p=density,V= velocity
Your Force will be:
F=P*S*A
in which F is the Force, S=Shape Factor= 0.65 for Pipe and A is your PROJECTED AREA of Pipe.
RE: suspended waste line over creek
If a couple of squirrels can take apart my sump pump PVC drain line.... a little wind should be no problem... NOT!!
RE: suspended waste line over creek
RE: suspended waste line over creek
http://www.eng-tips.com/viewthread.cfm?qid=49424
is a good forum, but i dont think it addresses if you are suspending from a steel cable, only rigid support. i need more info, before i google myself into oblivion. surely there is some table out there....
RE: suspended waste line over creek
RE: suspended waste line over creek
RE: suspended waste line over creek
Mike Halloran
Pembroke Pines, FL, USA
RE: suspended waste line over creek
Stephen Argles
Land & Marine
www.landandmarine.com
RE: suspended waste line over creek
RE: suspended waste line over creek
Somebody on here has a tagline: "First, design for graceful failure ..."
Patricia Lougheed
******
Please see FAQ731-376: Eng-Tips.com Forum Policies: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.
RE: suspended waste line over creek
RE: suspended waste line over creek
here: google this for great resource on this thread
"Suspension Canyon and Gully Crossings for Small Scale Community"