solar and snow drift
solar and snow drift
(OP)
Do you know about a paper or any other reference regarding snow drift under tilted solar panels?
Thanks,
ahmet
Thanks,
ahmet
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: solar and snow drift
Anyway, all the snow on the corresponding plan of the panel can be dumped before it, and this become critical to some purlin or deck, maybe. That would be a conservative assumption for the dump point. For the panel zone, assume then a uniform distribution and you have both extremes covered.
However if you think that what above does not lead to a safe situation you need still look for some more accurate statements. Not to forget concentration of snow from wind as with any obstacle, and concentrations on valley and retention points of the roof, the same. Or the cases where a huge amount of solar panels are the roof itself, then one must look at where it dumps.
RE: solar and snow drift
Thanks,
ahmet
RE: solar and snow drift
On the case the roof was of steel I might be in your ploy more than anything to battle excessive cost. Will keep looking.
RE: solar and snow drift
This may result in the elimination of snow loads on upper portions of the roof and their concentration on lower portions.
Also, what the
h
California Department of General Services . Division of the State Architect . Interpretation of Regulations Document
DSA (SS) IR 16-8 Solar Photovoltaic and Thermal
(iss 08-15-08) Systems Acceptance Requirements Page 1 of 5
SOLAR PHOTOVOLTAIC AND THERMAL
SYSTEMS ACCEPTANCE REQUIREMENTS
References: 2007 California Building Code (CBC), Sections 1609A and 1613A Issued 08-15-08
IR 16-8
has to say is
6.1.5 Roof Live Loads on Panels. It is not necessary to include roof live load (20 psf) in the area(s) covered by the panels when these area(s) are inaccessible, or
fenced off with posted signs prohibiting storage under the panels.
When applicable, include snow loads and loads from snow drift.
It interestingly resolves -their way- the question on if keeping the live load on the solar panels plan.
For Wisconsin...
http
"The UDC does not set lower snow live load values for roofs with glass or other slippery surfaces unless per s. Comm 21.27(1)(b), the slope is 7 in 12 or greater just as for other roof types. Otherwise, attached greenhouses, solar spaces, solar panels and other similar roof construction should be designed to withstand 40 or 30 PSF for zone 1 or 2 respectively."
http://w
RE: solar and snow drift
http://www.kaldtklima.net/node/234