Yeah, the copper racks are really great. Some of our guys are pretty rough with the racks so they last a little longer, but PVC is easy to repair in the field and much easier to move around. I prefer PVC for myself, but Copper for some of my work crews.
We used to do our own calibrations...
thread507-222919
I ran across this old forum where someone was searching for an ASTM E1105 spray rack and wanted to leave this tid-bit I discovered recently while searching the internet. I found a company online at www.ftltesting.com that manufactures spray racks that conform to the ASTM E1105...