Installing Lag Bolts Into Concrete

Home centers and hardware stores stock concrete screws in two diameters 3 16 in.

Installing lag bolts into concrete.

You will need to drill a pilot hole when using any type of concrete anchor. Regular drill bits will dull too quickly. Diameter screws are plenty strong for most home tasks like installing furring strips screwing down walls to concrete floors and attaching hardware to block or brick. Drill a hole in the base material with a hammer drill and a correctly sized carbide drill bit for the diameter lag shield anchor you are using.

Tapcon concrete screw anchors draw from its unique ability to tap its own threads into concrete making it an excellent alternative to expansion anchors plugs and lag shields. Next make sure you have a lag screw long enough for the installation. The first thing to do is put your drill into hammer mode and drill a hole in the concrete. A lag screw is the poor man s concrete anchor.

All of this information should assist in the safe and correct installation and use of concrete anchors and fasteners no matter what your application may be. Use a wrench to turn the lag screw clockwise until tight. After installation the fixture is removable because the lag shield anchor remains in the concrete and only the lag screw is unscrewed and removed. Be sure to have plenty of extra bits on hand and use a can of compressed air or a blower to clean dust away from the drilled hole.

Use a hammer drill when installing anchors into hard surfaces such as stone concrete and brick. Screws for most light to medium duty tasks. In this video i will show you how to drill into brick concrete and cement with a drill and also how to attach fix mount or anchor into a brick concrete or. They are thicker than ordinary screws have a hexagonal head and they are used in a myriad of materials to create structural integrity where it is needed most.

The pilot hole serves as a guide for the. The fixture is then placed over the lag shield inserting a lag screw through the fixture and into the lag screw. This means you would need roughly a 3 lag screw to complete this. For example if you wanted to install a 2 x 4 to the lag shield you would need to make sure the lag screw had 1 1 2 of clearance and then about another 1 to 1 1 2 to install into the shield.

A pilot hole is a hole that is drilled into the material you wish to use a lag screw on.