Post-installed anchors are not but our anchor materials are JIS standard. The thread is also manufactured with the thread accuracy specified by the JIS standard.

The product certification of the Japan Construction Anchor Association (JCAA) indicates that the anchor bolts satisfy the conditions of the following: specifications, quality and performance specified by JCAA.

We have various products that have obtained JCAA product certifications. Such as our C type, BA type, GA type, and CT type.

There are no legal restrictions in Japan (requirements might differ per country) but you may be required to have a qualification as a builder when performing anchor installation. Since the installation of anchors require accurate knowledge and skills, it is recommended that a person with a qualification as a builder should perform the installation.

After passing the qualification test conducted by the Japan Construction Anchor Association (JCAA), you will be qualified as a post-installed anchor builder and given a certification registration certificate. Post-installed Anchor builder is a proof that one has the technical ability to properly perform or manage anchor installation. In addition, a certification registration card will be issued.

Metal expansion anchors exert strength by expanding in concrete holes. If the prepared hole is larger than the specified diameter, the wedge effect will not be exhibited when the anchor expands, hence, the anchor strength cannot be obtained. Be sure to use a drill within the specified diameter.

If there is a finishing mortar on the concrete surface, make sure to secure the embed. depth value listed in the catalog at the depth excluding the finishing thickness of the mortar. Also, if there is a finishing material other than concrete (tile, cloth, etc.), make sure to secure the embed. depth value listed in the catalog at the depth by excluding the finishing thickness of the finishing material.

No. The "embed. depth" of the anchor refers to the length (depth) of the anchor to be embedded in the concrete. It is not the depth to drill a hole. "Drilling depth" indicates the depth of drilling from the surface of concrete.

Please refer to the installation procedure of “All Anchor” (C/SC/C-D) on the guide.

Please refer to the installation procedure of Bolt Anchors on the guide.

Please refer to the installation procedure of Grip Anchor on the guide.

Please refer to the installation procedure of Grip Anchor on the guide.

Anchors that can be used for asphalt pavement are as below:

Metric threads and inch threads are different. The crest, pitch, major diameter, and crest angle are different.

Through the diameter of the thread at the crests or root.

We recommend the 2nd to 3rd grade of the bolt hole diameter of JIS standard "bolt hole diameter and counterbore diameter" for the hole of the mounting object.

Please refer to the size chart from the link below.

SC Type has the strongest corrosion resistance followed by C-D Type then C Type. Please select the material you are using according to the environment in which you are using it.

Corrosion resistance is required for places where rain or water has a direct contact and rust is concerned. Such as, outdoors, near coast (because of salt damage), industrial areas, near highways (because of air pollution), etc.

It is a rust-resistant steel with excellent corrosion resistance. It is mainly composed of iron (Fe) and contains nickel, chromium, etc.

Stainless steel is classified according to its metallographic structure and is used for applications that make the best use of its properties.

It is not recommended.
It is generally said that "magnets do not stick to stainless steel with respect to iron", but magnets may be attached to austenitic stainless-steel anchors. The surface of stainless steel may change to weak magnetism by cutting or applying force. It is possible for magnets to attach to stainless steel anchors that go through these steps during the manufacturing process.

There are destructive and non-destructive tests to check the tensile strength of the anchor. We have non-destructive testing machines called "Techno Tester".
For more details, check out our product catalog.

AT type is mainly used for non-destructive tensile test of anchor, and RT type is mainly used for adhesion test. Please select the appropriate type according to the test content.

Follow the procedure below. (Example: Techno Tester AT-10)

First, set the load according to the instructions of the person in charge at the site. Please note that the max. tensile load in the catalog data is not the confirmed load.

When a tensile force is applied to the anchor constructed on the concrete in the axial direction, a very slight elongation of the anchor steel material and deformation of the concrete base material occurs. This is called "displacement". The max. value within the range where this displacement returns is what we call "proportional max. load". The displacement and load up to the proportional max. load are characterized by increasing values at a constant rate.

If the load is applied to the anchor and the proportional max. load is exceeded, the displacement will not return. The displacement that does not return becomes a permanent distortion, and the anchor starts to slip. The amount of displacement also increases suddenly, and the concrete gradually begins to come off, and finally it comes out with the cone-like fracture of the concrete. The max. value leading up to this fracture is called the "max. tensile load".

Do not apply the max. load to the anchor because it is dangerous and may break the base metal or the anchor. The load that can be applied to the anchor is called the allowable load.
For details, please refer to the product pages.

kN or "kilonewton" and is a unit that expresses force and strength. The Si unit is displayed as the International System of Units. In the catalog, the values of kN and load are displayed, and the values of kgf are displayed in parentheses. 1kN ≒ 102kgf. Units such as kgf of non-Si unit system have been stated as "must not be used for transactions or certification" (Article 8, Paragraph 1 of the New Measurement Law) since October 1, 1999. The law stipulates that Si units should be used for specifications and documents submitted to government offices.

The strength of concrete is indicated by compressive strength. 21N / ㎟ means "concrete that can withstand the compression force of 21N per 1㎟".