Lag screws are tough, long-lasting fasteners that can be used in a wide variety of applications. They can withstand high amounts of stress, making them ideal for construction projects. However, they’re not without their disadvantages — like the need for pre-drilling and the possibility of splitting wood if not installed correctly. This article discusses the proper way to use lag screws for wood to ensure a strong, long-lasting connection.
What Are Lag Screws?
Also known as lag bolts, these screws are some of the most durable fasteners on the market. Designed for heavy-duty materials or components that must withstand large loads, they’re much longer than traditional screws and have coarse threading to accommodate wood textures. They’re usually made of steel and only come with hex heads, making them a great choice for wood-to-wood connections that need to hold up to a lot of force.
Lag screws can be used for a variety of projects, from building doorways to constructing railroads. They’re especially useful in timber frame construction, as they can offer more tensile strength than standard screws and are made of galvanized zinc to protect against rusting and corrosion. To properly install a lag screw, first ensure the materials you’re joining are lined up and clamped together. Then, use a bit that’s slightly smaller than the diameter of your lag bolt to drill a hole through the two materials in the area where the screw will be placed. Unlike wood and sheet metal screws, lag bolts require a pilot hole because they don’t self-tap into the materials as they are screwed in. lag screws for wood