symbol libraries?

Has anyone out there got a good collection of symbol libraries, or links to
downloadable symbol libraries that they would like to share? i work with
steel, so symbols i am looking for are mainly welding symbols, or basic
drawings of materials like beams, columns, rail road rail, flanges etc etc.
Whenever i have to do a job and need to draw in the materials i try to keep
hold of them in my own library, but i have to admit i probably dont get them
drawn as well as they could be, especially if the whole job needs to be done
in a hurry. any other useful symbols for construction or buildings would be
welcome also!

Thanks,
Shaun

 

For basic steel shapes I use Al Rogers Steel Mill, Tip 1779 from
http://www.cadalyst.com/cadalyst/ get the code section.

For weld symbols I use Tip1735a: WELD.LSP Automated weld symbols
from Chris Crain, same source.

 

Relative to drawing beams/cols./etc. I moved to a 3D pgm called Sketchup.
(free d/l from Google) I purchased a $10.00 package add in named ? cadalog
beam tool, I believe. These two packages will generate Structural steel
components in record time. The 10$ add in gives you a pull down menu with a
visual as well. You can then export them to Acad as dwg./dwf. files.
R12,13,14, 2000,2004 There's several versions/formats to export to.
I can send an example if you want.

Dan

 

Correction; the $10.00 d/l is named
beamtool.zip