What diameter screws are typically used for attaching steel decks?

When attaching steel decks, using screws with a diameter of #12 or 1/4 inch is common due to their strength and compatibility with steel materials. These sizes provide sufficient grip and load-bearing capacity to ensure a secure connection between the decking and the underlying structural elements.

#12 diameter screws offer a robust threading that allows them to create a more secure attachment to steel substrates, reducing the risk of shear failure under load. Similarly, 1/4 inch diameter screws are often favored for their reliability in securing materials where tightness and resistance to pull-out forces are crucial, especially in structural applications.

This choice also reflects a balance between ease of installation and structural integrity. Bigger screws could potentially cause damage to the materials being fastened, while smaller screws may not provide the necessary strength required for secure applications in steel decking.