What type of screw is often used to fasten heavy equipment to wood framing?

Lag screws are specifically designed for heavy-duty applications, making them ideal for fastening heavy equipment to wood framing. Their large diameter and coarse threads provide excellent holding power in wood, allowing them to securely anchor substantial weights. The tapered design of the screw's head also facilitates a flush installation, enhancing both stability and safety by minimizing protrusions that could pose hazards.

In contrast, machine screws are typically used in applications where precision is critical, often threaded into a tapped hole rather than working with wood. Hex screws, while capable of a variety of applications, are commonly seen in metal assemblies, not specifically designed for wood. Sheet metal screws, although they can pierce into wood, are better suited for joining thin sheets of metal rather than handling the load-bearing requirements that lag screws are intended for. This makes lag screws the most appropriate choice for securing heavy equipment to wooden structures.