Gripple duct trapeze for rectangular duct

Before you start

• Use the exact manufacturer system, approved submittal, load table, anchor type, cable size, bracket, locking device, installation tool, and attachment method for the project. Do not mix components or guess a working load.
• Confirm the rectangular duct weight, trapeze bar length, cable angle, lock type, overhead attachment, and approved load per support.
• Check the bar, cables, locks, and contact surfaces for damage.
• Verify the trapeze will support the duct body rather than a flange joint.

Lay it out

1. Mark support points clear of transverse joints and weak fitting bodies.
2. Set both cable drops so the bar will land square under the duct.
3. Coordinate cable angles with nearby structure and access.

Set and support it

1. Install both approved overhead attachments.
2. Assemble the trapeze exactly as the manufacturer requires.
3. Level the bar before placing the duct.

Make the connection

1. 1

   Verify both attachments and cable locks.

2. 2

   Raise the duct and set it on the trapeze bar.

3. 3

   Center the duct so the load is balanced.

4. 4

   Adjust both cable legs evenly to final elevation.

5. 5

   Confirm the bar remains level and square to the run.

6. 6

   Lock the system and secure cable tails as allowed.

7. 7

   Release the lift and recheck the joint clearances.