Connect branch duct to a tap with S-and-drive

Before you start

• Confirm the duct size, end construction, pressure class, seal class, and joint shown on the approved shop drawing.
• Inspect both duct ends for crushed corners, torn locks, bowed panels, loose reinforcement, or shop damage before lifting them into place.
• Make sure the supports are already installed or the sections are otherwise held so the joint is not carrying the weight of the run.
• Stage the correct S-cleats, drive cleats, sealant, hand tools, clamps, and access equipment before starting the joint.

Lay it out

1. Confirm the tap has already been cut in, squared from the main, clamped, fastened, and sealed.
2. Verify the branch centerline and elevation from the main—not from a crooked tap outlet.
3. Check that the first branch hanger is installed close enough that the branch cannot pull the tap.

Set and support it

1. Support the main and branch independently.
2. Hold the branch on the intended centerline and bring it to the tap without moving the tap.
3. Use clamps only after the tap and branch faces are aligned.

Make the connection

1. 1

   Fit the S-cleats to the tap outlet and branch end.

2. 2

   Bring the branch to the tap and confirm the tap remains square to the main.

3. 3

   Start the side drives and seat them fully.

4. 4

   Finish and secure the drive ends.

5. 5

   Seal the branch connection as required.

6. 6

   Release the branch slowly and verify its support is carrying the load.