Standard Movement Flue Duct Expansion Joint
The Holz Rubber Series 942 U-Design Flue Duct Expansion Joint is built for standard or normal movement. It’s equipped for applications requiring standard movement, maximum noise, vibration, and sound absorption, allowing superior protection to duct systems, flanges and equipment housing.
Typical Installation Arrangement
Holz Rubber Series 942 Flue Duct Expansion Joint
Maximum Movement Capabilities (in inches)
Movement shown at face-to-face
Lateral Offset figures are based on the assumption that all lateral movement occurs prior to compression movements. In practice, movements may occur simultaneously thus the allowable lateral offset may increase or decrease.
Extension may be increased or decreased by pre-compression during installation. However, the amount of pre-compression will correspondingly reduce the compression ratings.
For constant vacuum, a set-back may be required to ensure the joint is not in the media stream.
Add 6 inches to the face-to-face dimension for calculating the square footage. Retaining Bars: 3/8″ X 2″, A-36 Carbon Steel.