What is a double expansion anchor?

A double expansion anchor is a type of masonry anchor used for anchoring into materials of questionable strength or quality. In the world of masonry anchors, most rely on deforming a portion near the bottom of the anchor once inside a hole to prevent the anchor from coming loose.

What is the strongest anchor for concrete?





Wedge anchors

Wedge anchors are typically the strongest anchors, but not every application requires a heavy-duty anchor. Some will do just fine with a plastic wall anchor or a nail-in version.

What is the difference between wedge and expansion anchors?

The wedge anchor can only be used in solid concrete.



Wedge anchors are designed not to be used in other masonry materials such as brick or hollow block. The expansion clip on the wedge anchor is placed on the anchor body in a manner and location that makes the expansion tolerance location critical.

How do you expand a concrete anchor?

Quote from the video:
Quote from Youtube video: Place the fixture over the anchor and insert the machine threaded bolt through the fixture. And into the anchor. Once the bolts is finger tight use a wrench to expand the anchor.

What is the difference between anchor bolt and expansion bolt?





As the expansion anchor bolt enters the hole, it will expand. This expansion helps to secure the anchor bolt — as well as the structural component or object to which it’s connected — in place. Technically speaking, an expansion bolt is a type of post-installed anchor bolt because it’s installed in a pre-drilled hole.

What are expansion anchors used for?

Expansion anchors are fasteners designed for use in masonry base material that provides holding power through expansion. There are two kinds of expansion anchors; pre-expanded and unexpanded. The pre-expanded expansion anchor is inserted in a predrilled hole compress and then exerts force to create the holding power.

What is the difference between a concrete fastener and a concrete anchor?

A concrete fastener of any type only holds as well as the base material in which it has been fastened. In most cases, the base material gives out, not the anchor itself. When properly set, the concrete fastener pulled to the ultimate load capacity of the anchor will pull out the base material adhered to the anchor.

Are Tapcon screws better than anchors?

Tapcon and wedge anchors are pre-installed mechanical anchors that attach structural objects to concrete structures. However, the wedge anchor suits heavier-duty applications, vs the Tapcon anchor that typically serve lighter deployments. Another difference between them is in their fastening method.

How much weight can a 1/2 concrete anchor hold?



Technical Specifications for Drop-In Anchors

Size Minimum Embedment Pull-Out (lbs.)
1/4” 1” 939
3/8” 1-9/16” 1560
1/2” 2” 3105
5/8” 2-1/2” 3323

When should I use expansion bolts?

Quote from the video:
Quote from Youtube video: The expansion bolt carefully into the hole until it's flush with the surface of the wall tighten. The bolt so that the shell expands. And fits tightly. Into the hole.

How do you use sleeve expansion anchors?

Quote from the video:
Quote from Youtube video: You place the fixture over the hole making sure that the hole in the fixture is large enough to allow the sleeve anchor to be inserted through it. Place the anchor through the fixture.

How deep should anchor bolts be in concrete slab?



A 5/8” concrete wedge anchor requires a 5/8” hole to be drilled into the concrete. The hole in the concrete needs to be drilled a minimum of 1/2” deeper than the concrete wedge anchor will penetrate into the concrete.

How do you use expansion bolts in concrete?

Quote from the video:
Quote from Youtube video: Take the wedge anchor. And place the nut on the threaded end so as to protect the threads when hammering it into the hole. Next place the anchor through the fixture. And into the hole tapping.

Can expansion bolts be removed?

Sometimes, simply removing the screw may reverse the expansion of the anchor. Or, the anchor can be removed simply by pulling it out of the hole. As with all female type anchors, the lag shield anchor can be left in the hole because it will not protrude above the surface.

How do you install anchor bolts in a concrete foundation?

Quote from the video:
Quote from Youtube video: So what we'll be doing is putting concrete inside the hole and putting the anchor bolt down inside. And once the concrete's in there and it give it time to solidify.

What are the best anchors for brick?



Sleeve anchors are versatile and can be used in solid brick, brick with holes or the mortar joint. Sleeve anchors provide the widest variety of head styles and they come in round slotted head, flat Phillips countersunk, acorn head or the standard hex nut.

How do you use expansion screws?

Quote from the video:
Quote from Youtube video: The sleeve up against the drill and mark with tape insert. The expansion bolt carefully into the hole until it's flush with the surface of the wall tighten. The bolt so that the shell expands.

What are wedge anchors?

“Wedge anchor” is a generic term for a type of anchor used to fasten a variety of materials to concrete. Some companies have different brand names for their wedge anchors such as Kwik Bolt, Power Stud, and Thunderstud.

What is sleeve anchor?

Sleeve anchors are versatile masonry expansion anchors. They can be used in a variety of base materials, and they are available in a wide variety of diameters, lengths, and head styles. They come preassembled, so they are ready for immediate installation.

How much weight can a concrete sleeve anchor hold?



200 pounds

Generally speaking, sleeve anchors fall into the medium-duty territory or up to 200 pounds of weight that can be secured safely.

Do sleeve anchors expand?

Quote from the video:
Quote from Youtube video: This will pull the stud up through the sleeve expanding. It against the wall of the base. Material.

How do you use expansion bolts in concrete?

Quote from the video:
Quote from Youtube video: Take the wedge anchor. And place the nut on the threaded end so as to protect the threads when hammering it into the hole. Next place the anchor through the fixture. And into the hole tapping.

Where are expansion bolts used?

Expansion bolts are fasteners used in masonry materials that expand once inserted into a predrilled hole in the masonry. The expansion of the anchor is accomplished in different ways and the anchors are designed for different applications. Expansion bolts come in a number of different configurations and types.

How deep should anchor bolts be in concrete?

The hole needs to be drilled 1/4″ deeper than the anchor will penetrate. The hole can’t be drilled while the fixture is in place due to the fact that the hole is larger than the diameter of the bolt being inserted into it.