ASCE7 Maps
ASCE7 Maps
(OP)
Anyone else out there think that the ASCE7 maps totally stink?
The lines are blurrred and the only markings are the county lines. Why not put some cities on there to give you a point of reference. Who knows which county any of my jobs are in.
Does anyone have neat tricks to help.
csd
The lines are blurrred and the only markings are the county lines. Why not put some cities on there to give you a point of reference. Who knows which county any of my jobs are in.
Does anyone have neat tricks to help.
csd





RE: ASCE7 Maps
We don't use the ASCE maps - we determine the Latitude and Longitude of the site in question using this site:
http://tiger.census.gov/cgi-bin/mapbrowse-tbl
And then plug the Lat and Long values into this site:
http://
(see the Hazard Values - Hazard by Lat/Long link on the page)
And get the S1 and Ss values from that directly.
RE: ASCE7 Maps
Thanks, but wind governs on the east coast and this does not help for that.
csd
RE: ASCE7 Maps
RE: ASCE7 Maps
RE: ASCE7 Maps
I find it crazy that you can meet the state designated wind code and still have the town overide it.
csd
RE: ASCE7 Maps
RE: ASCE7 Maps
RE: ASCE7 Maps
RE: ASCE7 Maps
In fact, I was going to attempt to contact the developers of ASCE-7 to see if that has been done. I'm not sure who to contact. Mehta does not appear in the Texas Tech directory and Delahay has passed away.
RE: ASCE7 Maps
RE: ASCE7 Maps
RE: ASCE7 Maps
There is uncertainty in anything that has to do with wind - that is why we have a code!
If there is uncertainty to do with interpretation of the code, then that is a big problem for us engineers.
Some dots for major cities would go a long way to clarifying the map.
csd
RE: ASCE7 Maps
http://quickfacts.census.gov/qfd/index.html
Once there you will be able to insert a city and state and be given the county.
Also you can view and download state maps with the county outlines and names.
Using the above you can then identify the county of interest on the ASCE maps.
RE: ASCE7 Maps
that is very usefull.
csd
RE: ASCE7 Maps
htt
RE: ASCE7 Maps
I agree with your comments. Difficult interpretation of the code is unacceptable and opens the doors for decisions that could have drastic differences in outcomes (V^2). My point though is that no matter how nice the map is visually, there is still uncertainty in wind hazard, wind speed degredation, etc. Thus, uncertainty is somewhat inherent - not saying that this is right. Even if the map were perfect, most jurisdictions have decided where they fall geographically. In some states, jurisdictions have traced the design wind speed contour to the street level! I agree, frustrating to deal with. There will likely be significant changes to the map in the next few revisions to deal with statistical reliabilty for different design methods. We can hope that your point will be resolved at that time.
RE: ASCE7 Maps
RE: ASCE7 Maps
always go with the next higher wind zone.
really not that difficult, though a feature similar to the USGS for seismic would be nice.