Standard Sizes for Rock Bolts

D19, D22, D25, D29

That’s the standard size, but recently we’ve also been making D32 models.

This means that custom sizes are available.

That's right.

Therefore, if you use the tip as well, the quality will be excellent.

Since PVC is difficult to secure, please install it further back than the PVC.

Of course I'll be there!

These products are carefully manufactured at a JIS-certified factory, so please feel free to use them with confidence.

Yes, there is.

We installed the original spacers, had the local government officials verify the installation of the clip spacers in person, and made the change.

After all, it's just a matter of spacers, so it's easy to change.

It's a bit long because we've allowed for 5 mm of shrinkage, but,

Please adjust it using wire cutters, such as a Clipper.

Yes, there is.

Please use the data below.

Cross-Section of the Natural Ground Using Clip Spacers

I usually include this at the very bottom of my blog posts, but,

I'll post it here as well.

However, please note that this does not apply to core dies, so please be careful not to confuse the two.

Core Die

A Guide to Core Stands

Manufactured and Sold by Wakazono Seisakusho

Bolt Scale, Dedicated Box, Clip Spacer, and Greenery Spacer
Please see below for inquiries and retail locations.

Natural Applied Sciences, Inc.
(Slope Greening Materials Group)
Phone: 052-212-1441

Koiwa Wire Mesh Co., Ltd.
(Contact the Chubu Branch)
Tel. 0568-75-7710

Showa Co., Ltd.
(Kagoshima Prefecture)
Tel. 099-296-1234

Fujiwara Industries Co., Ltd.
(Bolt scale only)
Phone: 06-6683-0797

Ura-Tsuji Industries, Inc.
(Shimane Prefecture)
Phone: 0852-24-6881

So far, Shizuoka, Aichi, Mie, Gifu, Niigata, Toyama, Kagoshima, Kumamoto, Fukuoka, Nagano, Wakayama, Tottori, Shimane, Yamaguchi, ...

I don't know any more than that.

I have a track record. My reviews are decent.

If you spotted this, I’d have to say you’ve got a keen eye!

That's because the bore diameter for a 90-diameter hole is about 105 mm.

In addition, we anticipate a slight deflection of about 5 mm due to the weight of the rebar when it is attached to the rebar.

SoWe're making this with a diameter of about 110 mm in mind.

To put it simply,

This is

This is the spacer that will be used.

Although it is made of iron, we use a type of material called special steel.

It is a material commonly referred to as spring steel.

It is a material similar to the PC steel strands that we slope engineers are familiar with.

The drill hole size is basically

For 65-diameter holes / For 90-diameter holes

These are the most common. Recently, we’ve also produced versions for 115 and 135 bore diameters.

I thought that at first, but it actually goes in surprisingly easily.

You can also insert it the other way around (with the legs facing up) and give it a quick twist to stand the clip spacer upright.

Please feel free to use it. It's fine.

It is a material that is harder than the rebar being inserted.

Also, even if it’s pulled with a strong force, since it’s made of spring steel, it’ll stretch out and contract with a “boooing” sound.

*Note: However, it doesn't actually stretch that much—like "booooon."

If it extends above the hole diameter, use a wire cutter (such as a clipper) to cut off the legs of the clip spacer,

Please adjust it.

In reality, if the length exceeds 3 meters, the rebar centerline will sag.

If the height exceeds 4 meters, the center of the rebar may come into contact with the natural ground.

If you set them up so that the distance between the two points does not exceed 3 meters, they will definitely float.