Audra Oliver Hit the nail.
As an Architect and Museum Designer that is where I always start.
William M. Greaves AIA, NCARB
Principal
Architects iN Design
http://www.architectsindesign.com
[log in to unmask]
1(757) 478-6489 PHONE
1(757) 496-6489 FAX/PHONE



 Two quick thoughts - Your state highway patrol or motor vehicles or
highway division or maybe your local planning commission might have
specs
 on this.  Another thought - bus manufacturers or bus companies or your
local transit company (if you're big enough to have one that runs large
 busses) could provide you with the info.

=========================================================
Important Subscriber Information:

The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes).

If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).