Explanation:

Cleat joints:

• Folded joints are the integral parts of an article and they are all considered to be permanent fixtures.
• Cleats vary in application and design and are commonly made in a bar folding machine.
• Cleats that are of simple design can be manually folded.
• It is a good practice to make a sample of the component to be connected.

The drive slip:

• The drive slip is a simple design consisting of a metal strip formed into a ‘C’ shaped section.
• The joint is made by driving the cleat over the folds positioned at each end of the work to be joined.
• The drive slip is mainly used to join lengths of ductwork.
• The joint is simply made by driving the cleat over the folds on the ends of the jobs.
• However, cleat joints consist of a folded cleat section that interlocks with folds on articles to be joined and can be dismantled, if necessary. It is a good practice to insert a tongue into the end folds of the abutting cleat.
• An alternate is to bend the tongue and secure with blind the tongue and secure with blind rivets.
• A similar corner finish may be done.
• Variation of duct end design will provide additional strength.
• In one example drive slip can be used to connect channel folded duct ends, which is giving the appearance of a standing.