British Gypsum
Understanding the codes on Gypframe components | British Gypsum
529 views
You will see that most Gypframe products are given a reference (or Code) number consisting letters and digits - this allows you to check the type of product it is ('C' Stud, Standard Channel, Flanged Channel, etc.) and the gauge of metal used in manufacturing the component.
https://www.british-gypsum.com/product-range/metal-products/the-gypframe-code