- Each Slab Should Be Undercut 1 7/8” In Height To Use With Johnson Bi Fold Track 100FD
- Add Jamb Thickness
- Add 1″ Clearance Under the Door
- Each Slab Should Be Narrowed in Width By ¼” To Accommodate Johnson 100FD Hardware
- If Customer Is Using Their Own Hardware – DO NOT UNDERSIZE Slabs.
