Linear Interpolation of Wind Speed Maps (ASCE 7-16)
Linear Interpolation of Wind Speed Maps (ASCE 7-16)
(OP)
I don't know about the rest of you but when I look at the new wind speed maps in the ASCE 7-16, in particular the eastern United States I find the contour lines a bit confusing. With that in mind I spent a couple minutes this morning trying to fill in some of blanks so to speak, see below:

Its obvious that there a number of saddle points in the isolines and that is what complicates things at first glance. I am curious how well these hand sketched isolines would correlate with the ASCE hazard tool.
The way the map is shown in the printed manual doesn't define the isolines in enough detail in my opinion, too much is left to interpretation and user error. The one spot value at the end of Lake Michigan is a case in point.
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

Its obvious that there a number of saddle points in the isolines and that is what complicates things at first glance. I am curious how well these hand sketched isolines would correlate with the ASCE hazard tool.
The way the map is shown in the printed manual doesn't define the isolines in enough detail in my opinion, too much is left to interpretation and user error. The one spot value at the end of Lake Michigan is a case in point.
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com






RE: Linear Interpolation of Wind Speed Maps (ASCE 7-16)
This brings to mind the numerous discussions regarding significant figures that I had from my university professors back in the day. We are misrepresenting our data and falsifying its accuracy when we use such ambiguous maps but then turn around and try to provide such in depth analysis with our complicated algorithms.
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com
RE: Linear Interpolation of Wind Speed Maps (ASCE 7-16)
I'm wondering if anyone could recommend a surface program that could extrapolate the surface given a number of spot values and isolines?
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com
RE: Linear Interpolation of Wind Speed Maps (ASCE 7-16)
https://asce7hazardtool.online/
RE: Linear Interpolation of Wind Speed Maps (ASCE 7-16)
The funny thing is that they have very detailed maps now for the State of Hawaii, yet the map for the continental US is quite crude in comparison. I know we can do better than this.
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com
RE: Linear Interpolation of Wind Speed Maps (ASCE 7-16)
RE: Linear Interpolation of Wind Speed Maps (ASCE 7-16)
I'm not afraid to calculate seismic or wind loads to 8 decimal points in a spreadsheet, but keep in mind that the uncertainty associated with reading the maps is probably less than the uncertainty in the actual wind speed data.
RE: Linear Interpolation of Wind Speed Maps (ASCE 7-16)
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com
RE: Linear Interpolation of Wind Speed Maps (ASCE 7-16)
And... here's an add-on for Excel that will do it.
http://www.xlxtrfun.com/XlXtrFun/ReadMeXlXtrFunAnd...
The latter is so good that it is part of my standard build for a PC.
Good luck with the latter it seems to be dead now.
Cheers
Greg Locock
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