On Wed, 27 Feb 2008 03:38:34 -0500, "Michael A. Terrell"
wrote:

:N Cook wrote:
:
: I was writing up tip for working on large desk top , mixer amps
: http://home.graffiti.net/diverse:graffiti.net/mixer.jpg
: The perforated angle metal marked D and the other one between D1 and D2
: supporting the edge.
:
:
: Are you familiar with Unistrut?
:
:http://images.google.com/images?q=unistrut&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7GWYA&um=1&sa=N&tab=wi


Yep..

Since it first appeared out here in the early 60's it was used to build overhead
ironwork in some telephone exchanges. It was sufficiently strong enough and
easier to handle than the heavy rolled steel U channel previously used.