
- Strut Flat Plates are designed to fit with all -Strut 1-5/8 in wide channels. Unless otherwise noted, -Strut Flat Plates are manufactured from 1/4 in thick carbon steel, 1-5/8 in wide, all holes are 9/16 in diameter, spaced 1-7/8 in on center and 13/16 in from the end.