Installation of Duct Reinforcement
There are three components in an aluminum reinforcement system: the aluminum reinforcement bar, discs, and mounting screws. The bar is inserted vertically in combination with the reinforcing discs inside the duct. Four discs total are installed for every bar, two on the inside of the duct and two on the outside surface of the duct. The self-threading mounting screws are inserted from the top of the outside disc to the reinforcement bar in combination with the inside disc. As shown:
Duct Reinforcement Joints as required
In case of multiple reinforcement bars as shown above, the distance between bars is 50% of the step Distance as indicated on the reinforcement chart. When an horizontal bar is also required, the bars shall be tied together at the point of intersection with cable ties.