antenna roof tower kpa

[pattontom]

what is the roof load kpa of roof antenna like this?

my client wants his roof to be able to take these possible antennas in the future. What is the biggest loads you have encountered?

Btw.. anyone knows what kinds of antennas are those? Why is it vertical? I know round shapes are microwave antennas. But what about vertical?

 

[transmissiontowers]

They look like cell phone antennas. They range in size but the larger ones are 12" wide and 6 or 7 feet tall and about 6 inches deep. In the USA, we are getting 4G service which is a step up from 3G. The "G" stands for generation as in 3rd generation and 4th generation. The phones were getting smaller until the Smart Phone came out and they are now getting bigger.

The EIA/TIA has specs for wind loads but you would apply the wind to the antennas and pipes and waveguides and see what it does to your roof. The PCS companies rent space on buildings to put their antennas.

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I have been called "A storehouse of worthless information" many times.

 

[DamsInc]

These are probably ballast mounts, to avoid penetrating the roof membrane and allow them to be relocated later if required. Supported by a grid of patio stones, maybe 3x3 (sometimes two or three layers thick if required). Can also be mounted to penthouse and parapit walls. The loading will depend on a number of things including the height required by the carrier, and the allowable rotation of the antennas specified by the manufacturer.

Roofs designed for decent snow/wind loads should be able to support them no problem.

 

[DamsInc]

Should also mention that sometimes the equipment required to run the sites can be large and heavy. The batteries and electrical equipment required at certain sites are housed inside utility shed type structures. They can be heavy and need to be located over columns. I don't work for the company anymore where we did this and I don't have any design references handy unfortunately.

 

[RFreund]

Typically for design loads I have used (In the US):
TIA-EIA-222 Ref F or Rev G.
Also ASCE7-10 Other Structures - however this can get complicated as I usually check the frequency of the pole structure.

I agree w/ TT and the usual sizes however you must have some existing information in order to evaluate the roof for the ballast load. Unless you can locate them over columns/bearing walls then it may be less worry some.

EIT

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