It has a nut and washer to fasten each element to concrete. This is also used to connect machines to concrete floors and buildings to their concrete foundations. The contact surface is created by drilling to bring the contact head in touch with the hole in the wall. We use the anchor bolt to fasten non-structural and structural components to concrete. Displacement controlled: This has a conical expansion plug and an expansion sleeve. Mechanical expansion anchors: Here the force transfer is through friction interlock mechanism. You can see this type of bolt at the website of the Anchor Bolt Manufacturers. Post-installed Bolts in Structures We can install post installed bolts after drilling through the concrete structures. Lifting inserts: This is used in pre-stressed or plain RC beams.

Bonded anchors: Binding Hex Nut organic materials are used here to provide the bond. Types of Anchor Bolts and Uses Anchor bolts play an important role in giving stability to a structure. In the first instance of bolt heads, all were square heads. A T-shaped screw is placed in it to transfer the load to the base material.Bolts are essential fastener units that find a use in making huge machines or structures. Now, it has given way to hex heads. It finds a use in concrete-steel composite structure as shear connectors. All anchor bolts need stiffeners and steel plates to function. The insert can be a threaded rod or a plain bolt. Force transfer takes place through this bond. It is used in the fabrication industry for giving stability to the structure. Headed stud: It is a steel plate with headed studs that are welded on it. For fastening a wall to concrete we make use of such a bolt called a J bolt.

It finds use for lifting operations. Threaded or ribbed rods can be used and we can experiment with the change in the local bond. It may be a cold formed steel shape or a hot rolled one. You can get more details from the J Bolt Manufacturers. Undercut anchors: Here the force transfer is through mechanical interlock. It is shaped like the letter J and has threadings on its non-curved portion. When cast-in-situ, the embedded part has a hex head, a forged flange, or a 90 degree bend. We use two kinds of mechanical expansion anchors. The sleeve is internally threaded to accept a threaded element. This is the simplest and strongest. In ribbed bars, the resistance of the ribs with the concrete whereas in threaded rods, it is mainly friction. We classify them according to what they do in the structure.

The load transfer takes place through the contact area alone. Here we discuss one prominent bolt - the anchor bolt. The shaft withstands rotation when torque is applied. What is a J Bolt? First type of anchor bolt is cast-in-place bolt. The various types of cast-in-place anchor bolts are as follows: Anchor channels: These channels are set into precast concrete channels. For all these, the mechanical interlock mechanism provides the means of load transfer. Threaded sleeves: This is made of a tube with internal threads that gets fixed back into concrete. This is guaranteed by mechanical expansion

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