Alternating circular perforation R

Perforation	Perforation (board) %	Board dimensions		Furring channel b mm max.	Edge design
Perforation	Perforation (board) %	Width mm	Length mm	Furring channel b mm max.	4 SK	FF/UFF	linear
8/12/50 R	13.1	1200	2000	333.3	•	•	-
12/20/66 R	19.6	1188	1980	330	•	•	•

Reference objects