ASCE Snow map

[dozer]

Does anybody know if there is a large version of the snow map shown in figure 7-1 of ASCE 7-02 available any where. Preferably something that would actually show cities so I don't have to strain my eyes trying to see county boudaries on my atlas.

We do work all over the U.S. so I'm not always familiar with the locale and that map is pretty small.

 

[JAE]

I feel your pain - and would love it if they had a pdf version of it somewhere.

One thing we usually do anyway, is call the local governing authority (city building department, etc) and ask what they require. It is usually quite surprising that many times the mapped ground snow and the cities adopted code is different.

 

[TFL]

ct and ma have charts or clarifications in the building codes or in supplements that list snow, wind and earthquake loads by town.

for ct and mass. all of this info is available on the web

ct supplement has a chart

http://www.state.ct.us/dps/DFEBS/OSBI/TechServ/2004_amendment_to_1999_sbc.pdf

mass. entire code online with charts

http://www.mass.gov/bbrs/NEWCODE.HTM

fyi new york modified the standard ibc to be vastly different from the maps

 

[j19]

This may not be exactly what you're looking for, but the 2002 Metal Building Systems Manual contains wind, snow, etc load data listed by county. You can go to mbma.com and click on Update to Building Systems and download the latest update which includes the load data. MBMA's data is based on ASCE 7-98 but if you look in the ASCE 7-02 Commentary it says the wind and snow maps were unchanged from the 1998 version to the 2002 version. You will still have to use your atlas if your not sure what county the city is in.

P.S. The entire MBMA manual is available for about a hundred bucks and if you have to calculate wind pressures or snow loadings by hand or at least check them then I highly recommend that you get it. It will help answer some of those nagging questions that you sometimes run into.

 

[3dboy]

you can always use a magnifying glass! Oh the joys of getting old!

 

[dozer]

3dboy,
Ouch, that hurt.

j19,
Thanks, that is helpful. I found a document that had a detailed report of ground snow loads in New Hampshire. In the report they had a blow-up of just the state of NH from the ASCE map. I wonder where they got that from. Something like this for every state would be great. Here's the web address if any one is interested:

http://www.crrel.usace.army.mil/techpub/CRREL_Reports/reports/TR02-6.pdf