Concrete anchor bolts and earthquake resistance
When you hear or see the words “concrete anchor bolts” you probably envision huge bolts used to hold a building to a concrete floor. They do come in that size, but they also have much smaller ones used to anchor things to a concrete wall, such as a TV mount, as well as for use in guard rails, etc. They are special bolts for use in concrete and they all have a threaded end so you can attach something to them with a washer and nut.
The strongest one is set in wet cement, bolt head down and held in place until the concrete sets. These are also the most difficult to cast, so they usually use these only for such things as mounting heavy machines on poured concrete floors or connecting a wall of a building to the concrete foundation. This does make the building more resistant to the forces of an earthquake.
The other two types of anchor bolts in concrete are epoxy and mechanical, and they are both used after the concrete has set. You need to drill a hole to put the bolt in for either of these. Epoxy is a type of glue which is put in the hole before you set the bolt. This type can be tricky to use as you need to make sure the epoxy is mixed just right, the correct amount is placed in the hole and it is allowed the proper time to set. Mechanical bolts are specially made to create a wedge at the bottom of the hole when the bolt is tightened down. This helps to ensure it will hold in place.
No matter which type you choose, if they are not installed correctly, they will not work as they should. You need to choose the correct for the design of the job, and make sure it is installed correctly, to obtain the security you are looking for.