And of course you'll want to make sure you can support the weight of the AP along with it. Those outdoor units can be hefty. That is unless you're using extension cables to hang the AP inside with the antenna outside. In which case, proper sealing of all of your connectors, lightning arresting, power protection, etc are all good 'non mount' gotchas you're going to want to consider. -Sam
On Mon, Aug 8, 2016 at 7:06 PM, DAVID BEYERLE <deb...@psu.edu> wrote: > Ken, > > First calculate the wind pressure from the antenna using something like > http://www.wikihow.com/Calculate-Wind-Load. A wind load of ~25 lb for > that antenna should be *very* conservative. Then sum the reactions > (torques) at the base of the roof mount...the antenna imparts an > overturning moment of ~250 ft-lb at the mast base, and so you ballast the > mount to compensate for this. The base of the frame is ~3' square, so the > center of mass of cinder blocks which you'll use for ballast will be ~1.3' > from the base of the mast, suggesting 180 lb of ballast should be enough. > Many installations use considerably less ballast and get away with it. I > happen to not like my masts to move (much). > > The "gotcha" you should be aware of this that your roof must be able to > support a ~200 lb load over an area of ~6 sq ft. Of course, if it supports > you, it likely will support the loading of this assemblage as well. > > Best, > Dave > > David Beyerle, P.E. > Communications Engineer, IEEE WCP > Penn State University > 117 University Support Bldg 2 > University Park PA 16802 > da...@psu.edu > 814 863-9432 <callto:814%20863-9432> > > ------------------------------ > *From: *"Mattson, III, Ken V" <kenmatt...@creighton.edu> > *To: *WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > *Sent: *Monday, August 8, 2016 6:30:21 PM > *Subject: *[WIRELESS-LAN] Non penetrating roof mounted WiFi antenna > > Has anyone roof mounted an AIR-ANT2588P3M-N antenna? Do you have pictures > of the installation that you could share? How high did you mount it? How > much weight did you put on the base? We plan on putting it as high at 8-10 > ft. on something like this: > > http://www.cableandwireshop.com/non-penetrating-roof- > mount-with-166-x-120-mast.html > > > > Any gotchas we should be aware of? > > > > Thanks for any assistance, > > > > Kenneth V. Mattson III > Director - Network and Data > DoIT > Creighton University > 402-280-2743 > 402-981-1140 > > A password is like a toothbrush: > Choose a good one, change it regularly and don't share it. > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at http://www.educause.edu/ > groups/. > > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at http://www.educause.edu/ > groups/. > > ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
