A metal deck sheet with a partial rib on one side that overlaps, onto the edge of the adjacent a metal deck sheet with a full rib. The lowest point in the deck profile is where the nesting usually occurs.

How A Nested Side-Lap Joint Works:

The steel deck panels have a lower lip and a upper lip. Then the sheets are nested onto each other and the side-laps are normally fastened together using button punches, screws, or welds.

Why Nested Side-Lap Joints Matter:

Steel deck panels that are fastened together add to the strength of the overall structure and prevent concrete or water from leaking through the metal deck. Learn more on The Anatomy Of Metal Deck.