1 ft x 1 34 in Armstrong Silhouette XL 916 in Bolt Slot

Mill straight slots in a plate then bolt wider pieces on top to form the T-slot? They have holes on a 2X2 grid, every hole has a 500

Drywall Grid System 9 Elite Narrow Stab System Smoothline Bolt Slot System

bolt slot Ultraline™ 4600 HRCmax Heavy-Duty 916 Bolt-Slot seismic ceiling suspension The ceiling grid is suitable for general areas and as part of the 4600

bolt slot grid Bolt Slot grid is a unique look This grid is 916” wide like narrow grid but there is a slot in the middle of the face that is 18”-1