That does not work when the "Boss" tells the one and only IT person to just do it. (or walk)
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Open for input on what these antennas are doing
- Thread starter pdtek
- Start date
‘engineers’ need to keep away from their vehicles. I saw some real doozies where an ‘engineer’ repaired something.
Like this, it wasn’t pretty, might not last, but it worked.
Like this, it wasn’t pretty, might not last, but it worked.
MTS2000des
5B2_BEE00 Czar
One could then report them to OSHA for an unsafe work environment and AHJ for every building code/life safety code violation. Go ahead, order an employee to something dangerous and illegal. Get it in writing. Document it thoroughly.
It's all good, until it isn't.
Moron managers usually find themselves the one walking out the door at that point. This is not a game. If one doesn't understand that, one is in the wrong line of work. If baggage handlers are allowed to fly airplanes, we'll have planes falling from the sky and twisted wreckage everywhere.
There is a reason why only qualified persons should be doing such installs, with the right tools, training, experience and insurance.
wtp
Member
weight of 1 cinderblock is 37 pounds
so the weight comes up to 1110 pounds.
the area is about 7 by 12, so 84 square feet or 13 1/4 pounds per square foot.
and the only thing i was going to post was that with cinderblocks it is a temporary thing.
so the weight comes up to 1110 pounds.
the area is about 7 by 12, so 84 square feet or 13 1/4 pounds per square foot.
and the only thing i was going to post was that with cinderblocks it is a temporary thing.
mmckenna
I ♥ Ø
Yeah, that's not excessive. Those roof sleds are designed to hold those blocks and spread the weight out. We've used those at work in the past for installations where any modification to the roof was off the table. It does look like there is an extra layer of roof membrane under it, so it doesn't look too concerning.
Considering the average weight of a ham radio operator would easily fit within a square foot or two, I don't think there's a roof loading issue.
Look like UHF Yagis, but not 100% sure. The panel antennas look like 900MHz antennas we've used before for data links. It does appear there's a diplexer or something on the coax. Does appear that it's a single coax feeding the Yagi and the panel antenna. Looks like a larger coax, as in not RG-6. The seemingly random aiming of all the antennas makes me wonder.
I've seen local Wireless Internet Providers do some absolutely sketchy stuff like this in the past. I've also seen some of the 900MHz Helium miner providers do similar installs. They'll pay someone a few bucks a month for roof access, then absolutely go to town with dumpy looking installations. Focus is making money, not making people on Radio Reference jealous.
Would love to know who/what this is.
"There's nothing more permanent than a temporary solution".
It's probably one of those 3rd worldsor banana republic-type country's . Maybe several offices and every one has their own yagi.
prcguy
Member
At a maximum of 30lbs per cinder block I also see about 1,000lbs for the setup. However, part of the building code in my area says you can expect a flat commercial roof to hold at least 300lbs within a 2.5 X 2.5 square based on roof mounted HVAC and maintenance worker needs. The antenna setup looks to be about 6ft X 9ft so you might expect that to hold at least 2,592lbs.
I've done a lot of large satellite dish installs on roofs and all large projects were calculated by a PE and some make the picture above look really small, so some commercial roofs are designed to withstand a lot of weight.
Current code isn't a reflection of past work. I've been on a number of roofs of older buildings that were pretty "live" with just my weight. ( Still fairly south of 200lbs) If this was done over a load bearing column (as Ubbe posited) then things might be okay. Given the rest of if the installation, I wouldn't put much confidence in that having been done nor can I envision a stuctural engineering signing off on something like this as a permanent solution. I've seen a lot of dumb decisions get stacked up in one place over the years that eventually result in failure of some sort.
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