Definitions Category: Rectangular Joints

TDC fittings fully assembled, all corners installed. Additional accessories such as cleats, nuts & bolts, gasket shipped loose (ONLY FOR USE WITH FITTINGS, NOT COIL LENGTH DUCT).

TDC fitting usually shipped knocked down. All accessories shipped loose.

TDC designation for straight duct in L shaped sections. Corners will be installed in each L section resulting in 4 corners factory installed. All other corners and accessories are shipped loose.

TDC coil line duct fully assembled, all corners installed. Additional accessories such as cleats, nuts & bolts, gasket shipped loose

Duct or fitting is fabricated with raw ends, no end treatment applied, no notches or flanges.

Standard slip and drive construction, slips will default to the width of the part entered and drives will default on the height.

Flipped slip and drive construction, drives will default to the width of the part enterd and slips will default on the height.

Standard slip and drive construction when one side exceeds 20″, slips will default to the width of the part entered and drives will default on the height.

Duct or fitting is fabricated with raw ends notched at the corners to allow for connection with the use of slips only.

To be used only with welded pressure files. Duct or fitting is fabricated with raw ends, no end treatment applied, no notches or flanges. This allows for a flush weld in the field to the next piece.

1″ turned out with open corners on the end designated, often used for drops and ceiling boxes.

1.5″ turned out with open corners on the end designated, often used for drops and ceiling boxes.

1/2″ turned in on the end designated.

1″ turned in on the end designated.

1/2″ of material turned out at 45 degrees at the bottom of a fitting to direct water away from the base. Generally used on curb adapters and curb covers.

FOR SMC USE ONLY (used for calculation when customers take off J-35 frames) NOT TO BE SELECTED FOR CUSTOMER ORDERS

2″ turned out with open corners on the end designated, often used for drops and ceiling boxes.