Concrete self-tapping anchor - a new type of anchoring product

Speaking of concrete self-tapping anchors, it has to mention its anchoring method. Previously, the anchor bolts used in construction were mostly two types of bottom anchor bolts and expansion anchor bolts. Generally, the mechanical properties and stability of the bottom anchor bolts are better than those of the expansion anchor bolts. The concrete self-tapping anchor is not a bottom anchor but not an expansion anchor. He has a new type of anchoring.

Everyone should have seen a screw with a screw that can be screwed into the wood with a screwdriver. The anchoring principle of the concrete self-tapping anchor is similar to that of the screw, which is formed by cutting the concrete through the teeth of the outer wall of the anchor bolt to match the threaded opening formed on the concrete. The anchoring effect of this method is better. Taking the M8×75 specification as an example, in the C30 concrete with a buried depth of less than 60 mm, the failure mode of the drawing test is concrete conical failure, and the destructive force can be up to 30 kN. The mechanical properties exceed the majority of the types of anchor bolts, which is attributed to the concrete self-tapping anchors are processed from carbon steel of grade 8.8 or above and 304/316 stainless steel.

Temporary anchoring is more practical

The self-tapping anchor of concrete is easy to install and can be anchored by objects such as curtain walls, guardrails and elevators. Moreover, careful observation will reveal that the self-tapping anchor is reversible when installed, and the anchor can be reversed by the torque drill, so the anchor has a property that other anchors do not have - detachable. Under special conditions, we can use concrete self-tapping anchors for temporary anchoring. After use, the anchor bolts can be removed for secondary use. This reduces material waste on the one hand and simpler disassembly without destroying other structures. .

Practical applications will become wider and wider

The contents of Appendix F of JGT 160-2017 "Mechanical Anchor Bolts for Concrete" implemented on December 1, 2017 are special experiments and requirements for self-tapping anchors. This is the first time that the anchors have been incorporated. In fact, before the implementation of the specification, some constructors who are knowledgeable are using the anchor. Now, when there are specifications to support this product, because of its high cost performance, it may become one of the more popular anchors in the future, and more and more construction workers will understand the anchor. Taihao Warehouse Haojing Technology Co., Ltd. is located in No. 188, Luxin Road, Taicang City. It is a professional manufacturer of expansion screws.