Ducting Y Pieces split sections of ducting into two, allowing you (for example) to use a single fan as the extraction for two rooms. They are tough, durable and resistant to moisture / heat. Y-Piece is frequently use Major Line of plant and HRSG.
Unison strut channel is support beam which is used for communication and electricity cable tray in building and plant. The main advantage of strut channel in construction is that there are many options available for rapidly and easily connecting lengths together and other items to the Unison strut channel, using various specialized strut-specific fastens and bolts.