Specific

Specific information on these components follows:
1. Vibration damping material is frequently specified for use on light-gage
rectangular sheet metal ductwork in order to minimize “ringing” of the metal. This
damping material is available in the form of sheets of self-adhesive mastic or in a
paste form for spraying or troweling onto the duct. This material stiffens the sheet
metal and renders it less susceptible to excitation. Generally, the need for
vibration damping material is greatest with large rectangular ducts and becomes
less with round or small rectangular ducts. Examples of vibration damping material include Kinetics Model KDD (self-adhesive mastic sheets) and Kinetics
Model KDC-E-162 (semi-liquid sprayable paste)