aluminum profile framing systems

huangyhg

aluminum profile framing systems
hi,
my company uses a particular brand of aluminum profile system, which is quite brilliant, but we are having trouble with the distributor.
we are looking to find another profile supplier, but i want to ask the community either recommended brands - or things to watch out for.
i really don't want to change from the current brand, as the connector system that they use is the strongest, simplest and best i have seen.
we use aluminum profile for machine frames that go into clean room environments, the maximium size we use currently is 100x100mm (4" x 4"). a big plus when using framing is the lack of finishing required and the anodized surfaces hold up well.
most aluminum profile manfacturers are german - is there any usa manufacturers?
you did not say who you are using, but i will recommend 80/20, "the industrial erector set.  
thanks smcadman,
i checked the site and will look into it further. i did not want to mention what manufacturer i am using just yet - but they also have cad downloads etc. which work well.
i think the key to any of these profile systems is the connector systems. some which require you to drill the profile for screws are really poor - and you may not be able to re-use the profile later.
thanks!