Anchor bolts are used to attach structures such as buildings or objects to concrete, the purpose of which is to keep it in place. There are many types of these that are trademarked by manufacturing companies, but all consists of threaded ends where a nut and washer are attached. Proper installation of concrete anchor bolts is very crucial to a building. If improperly done by the contractors and structural engineers, issues with the integrity of the building and strength ratings will arise.
In order for the installation to be done properly, collaboration between contractors and engineers is important, as well as utilizing the appropriate hardware as per the engineer’s plans. Basic installation involves drilling a hole the same size as the bolt shaft then inserting it in. That’s it.
However, there are different bolts for different application; therefore, installing these varies slightly. Here are two samples:
Drop-in anchors are used in applications that are medium to heavy-duty. They come in different kinds of steels such as zinc-plated carbon. It consists of a tubular expansion shield that is paired with a solid, cone-shaped expander plug. Installation procedure is as follows:
1. Using a hammer drill with a matching drill bit the size of the outer diameter of the anchor, drill a hole in the concrete that is deeper than the anchor length.
2. Make sure the hole is clear of debris and particles.
3. Place in the anchor in the hole with the slotted ends inside.
4. Using the right-sized setting tool, insert it into the anchor and set it by hammering. You will know that it has been set properly when the shoulder of the tool is even with the top of the anchor.
If a bolt will be subjected to vibration or where there is sheer load, most ideally used is the double expansion anchor because the weight of the load is distributed. It comes with a pre-assembled cone nut, hallow cone, and tubular shield. Installation is as follows:
1. Drill a hole using a matching drill bit the size of the outer diameter of the anchor. It is recommended that it be a bit deeper than the length of the shield.
2. Clear all debris from the hole.
3. With the nut end first, insert the anchor. Make sure the end is even or a little bit below the surface.
4. Fasten the object to the anchor and bolt in place.
When anchors and concrete anchor bolts are installed properly, complications will definitely be avoided. If you are uncertain which anchor should be used, consult with someone who knows more or check out forums.
Source: Vast Home & Garden
