USA analogue of EU Gastronorm standard
I haven't been able to find an official standard for US sized pans... the wikipedia even state : &quot;used worldwide except in the United States, which has its own domestic system&quot; but does not link to any reference to that system.
This seems to indicate that the Gastronorm was based on existing US standard :
&quot;At this meeting the basic size of 530 x 325 mm, already in use with American standard steamable pans, was accepted.&quot;
This lists a series of sizes that seem to be accepted nationally in the USA and says that : &quot;Gastronorm sizes are comparable to American sizes and can generally be interchanged.&quot; (bold by me)
So you can safely use GN sized pans everywhere.