Deep Leg Deflection Track Systems:

Head-of-wall vertical deep leg deflection track systems are required to allow the top of the wall stud to float within the top track legs. This connection allows for vertical live load movement of the primary structure without transferring axial loads to the interior drywall studs. A gap (determined by the Engineer of Record) is required between the top of the wall stud and the deflection track.

ProSTUD Drywall Framing studs can be used with three Deep Leg Track Systems:

• ProTRAK™ Deep Leg Track
• Structural Deep Leg Track (18ga. & 16ga.)
• MaxTrak™ Slotted Deflection Track

The below link shows more detail on each system:

ProSTUD Deep Leg Deflection Track Systems