TRACK (STANDARD)

Definition: 

A U-shaped member used for applications such as top and bottom track for walls and rim track for floor joists. The track has a web and flanges, but no lips. Track web depth measurements are taken to the inside of the flanges.

TRACK (SLIP/SLIT/FIRE)

Definition: 

A U-shaped member, used for applications such as top and bottom track for walls, that has slits in the web allowing for the installation of plumbing, electrical, and other trade installation.