Types Of Concrete Anchors? How & When To Use Them

2022-12-28

Types Of Concrete Anchors? How & When To Use Them

Types Of Concrete Anchors
You could see that we,Hebei Fuao Fastener Manufacturing Co.,Ltd who could produce different types of Concrete Anchors, like Wedge Anchor, Drop In Anchor, Sleeve Anchor, Chemical Anchor and so on.
Expansion screws generally refer to metal expansion screws. The expansion screw is fixed by using the wedge-shaped slope to promote the expansion to generate friction and grip force to achieve the fixing effect. The screw is threaded at one end and tapered at the other end. Wrapped with an iron sheet (some are steel pipes) on the outside, there are several cuts in the half of the iron sheet cylinder (steel pipe), put them together into the hole punched in the wall, and then lock the nut, the nut pulls the screw outward, and pulls the taper into the iron sheet cylinder, the iron cylinder is stretched open, so it is tightly fixed on the wall, and is generally used for fastening fences, awnings, air conditioners, etc. on cement, bricks and other materials. But its fixation is not very reliable. If the load has a large vibration, it may loosen, so it is not recommended to install ceiling fans, etc.

How & When To Use Them
Wedge Anchor
Introduction: There is no high requirement for the depth and cleanliness of the concrete cavity, it is easy to install, and the price is not expensive. Choose the appropriate embedding depth according to the thickness of the solid roof. As the embedding depth increases, the tensile force increases. This product has a reliable post-expansion function. Body material: stainless steel, carbon steel and other metal materials, etc.

Scope of use: suitable for concrete and dense natural stone, metal structures, metal profiles, base plates, support plates, brackets, railings, windows, curtain walls, machines, girders, purlins, brackets, etc.

Product advantages:
This product has a longer thread and is easier to install, and is usually used in heavy-duty facilities.
In order to obtain reliable and huge fastening force, it is necessary to ensure that the clamp ring fixed on the gecko is fully expanded. And the expansion clamp must not come off the rod or get twisted in the hole.
The calibrated tensile values are all tested under the condition of cement strength 260~300kgs/cm2, and the maximum safe load shall not exceed 25% of the calibrated value.

Sleeve Anchor
Fixed principle
The expansion screw is composed of a screw rod and an expansion tube. The tail of the screw rod is conical, and the inner diameter of the cone is larger than the inner diameter of the expansion tube. When the nut is tightened, the screw moves outward, and the axial movement of the thread causes the cone to move, thereby forming a large positive pressure on the outer peripheral surface of the expansion tube, and the angle of the cone is small, so that the wall, the expansion tube Friction self-locking is formed between the cone and the cone, and then the fixing effect is achieved.
The spring washer on the expansion screw is a standard part. Because its opening is staggered and elastic, it is called a spring washer. The function of the spring washer is to use the sharp corner of the staggered opening to penetrate into the nut and flat washer to prevent the nut from loosening.
The flat washer is also a standard part, and its function is to evenly distribute the pressure of the nut on the connected parts

Performance level editor broadcast
Performance grade 10.9 high-strength expansion bolts, after heat treatment, can reach:
1. The nominal tensile strength of the expansion bolt material reaches 1000MPa;
2. The yield strength ratio of the expansion bolt material is 0.9;
3. The nominal yield strength of the expansion bolt material reaches 1000×0.9=900MPa level;
The meaning of the performance grade of expansion bolts is an international standard. Expansion bolts of the same performance grade have the same performance regardless of the difference in material and origin, and only the performance grade can be selected for design.

Drop In Anchor
Application industry:
A special threaded connection used to fix machines, equipment or structural parts on concrete foundations, walls, etc. Such as: water heaters, exhaust range hoods, air conditioners, building curtain walls, billboards, pipes, fans, fire protection, water and electricity, wires and cables, machines, equipment, electromechanical ceilings, light steel keels and other installation industries and decoration industries.

Installation method:
First use an impact drill (hammer) to drill a hole of a corresponding size on the foundation (or wall), then put the nut into the hole, put the cone pin into the nut, and hammer the cone with a hand hammer and a special mandrel Pin, so that the bottom end of the taper pin is flush with the bottom end of the nut, so that the bottom of the nut expands around, so it can be firmly fixed in the foundation. Then align the mounting holes on the machine to be installed with the nut holes, place the flat washer and the spring washer in turn, and then screw the hex head bolts of the corresponding size into the nuts, so that the machine is firmly fixed on the foundation.

How to Install Concrete Wedge Anchors?
When we talk about how to install concrete wedge anchor, we have to consider the three most basic elements. They are the base material, the size and the depth of the hole.
Wedge anchors are known for its excellent anchoring power. They are used in solid concrete or grout-filled concrete to ensure high load capacity.
The hole size equals the anchor diameter size. You need to choose appropriate concrete drill bit according to the anchor size.
The last one is the depth of the hole. It’s the material thickness + minimum embedment + thickness of nut and washer.
Now let’s start. The tools you will need-hammer, drill with proper bit, open end wrench.
1. Drilling a hole referring to the diameter of anchor, if there is a M8 anchor, you need drill a M8 hole with the electric drill.
2. Removing the debris, and cleaning the hole with a brush.
3. Striking the anchor into the hole.
4. Tightening the bolt with a wrench.