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Wedge Anchor

Wedge Anchor is a generic term for a type of anchor

"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. The different brands of wedge anchors all work on the same principles, are made from the same basic materials, and provide similar high quality performance.

What is a Wedge Anchor?

Wedge anchors consist of two separate pieces that are permanently pre-assembled into a single unit. The first piece is a carbon steel rod that is threaded for a portion of its length. The opposite end, the installed end of the anchor, has a necked-down diameter, or conical space, that tapers outward back to the rod's full diameter.

The second piece of the wedge anchor is a steel clip, or sleeve, that is permanently assembled around the conical section of the rod. Each wedge anchor also requires a nut and washer to complete installation.

Wedge anchors can be used in numerous applications as long as the base material is solid concrete. Unlike many other concrete fasteners, the wedge anchor cannot be used in brick or block.

The wedge anchor is simple to use and is available in a wide variety of diameters and lengths. Wedge anchors can be used in both light and heavy duty applications. A 1/4" x 1-3/4" wedge anchor, for instance, would be utilized in a light duty application, while a 1-1/4" x 12" anchor would be used in a situation that requires a heavy duty anchor.

How Does a Wedge Anchor Work?

Again, wedge type concrete fasteners are designed for use in solid concrete only. They are designed to go into a pre-drilled hole in concrete. Once installed, these wedge anchors can not be removed without destroying the concrete. The size of the anchor is always equal to the size of the hole that needs to be drilled into the concrete. The tolerance between the hole and the anchor is very tight. As the anchor is hammered into the hole, the clip is recessed in the gap of the conical space, allowing the anchor to penetrate the hole. To set the anchor, the rod must be pulled-up (which occurs while the nut is being tightened), making the clip move outward on the tapered space, wedging itself between the rod and the wall of the hole.

Since the hole tolerance is critical in the performance of the wedge anchor, it is important that the correct drill and drill bits are used. A hammer drill should be used rather than a standard power drill because it creates a better quality hole. A carbide-tipped masonry bit should also be used because they are specifically designed for use in hammer drills and meet ANSI standards.

Wedge Anchor Holding Values

When anchoring into concrete, wedge anchors are an excellent choice because of their holding values. The holding power of the wedge anchor, as with any anchor, is always dependent on the quality of the concrete. As a rule of thumb, a safety factor of 4:1, or 25%, is generally accepted as a safe working load. Holding values are also derived from the depth of the embedment- the deeper the embedment, the better the holding values. The wedge anchor must be embedded into the concrete up to or past the minimum embedment depth to obtain published holding values. It is also essential to ensure that the anchors are not placed too close together or too close to an unsupported edge.

The pressure exerted on the concrete by a wedge anchor can be best described as cone-shaped, with the small end of the cone being the inserted end of the anchor and the large end of the cone being at the surface of the concrete. If two wedge anchors are set too close together, the pressure from the two anchors would intersect, decreasing the holding values of both anchors. These same factors apply when placing an anchor near an unsupported edge. It is possible for the concrete to crumble under pressure if the concrete anchor is placed too close to the unsupported edge.

The general recommendation is that an anchor should be placed no closer than five diameters from any unsupported edge. For example, a 1/2" diameter anchor should be at least 2-1/2" from any unsupported edge of concrete. Also, two anchors should never be set less than ten diameters from each other. That is, two 1/2" diameter wedge anchors should be placed at least 5" apart.

Determining the Correct Size Wedge Anchor to Use

The diameter of the wedge anchor required for an application usually depends on the size of the hole in the fixture to be fastened. The "fixture" could be anything from a 2x4 to a piece of angle iron, bracket or steel plate. The hole size in the fixture is most often determined by an engineer based on the necessary holding values for each particular application. It is imperative to ensure that the concrete wedge anchor fits through the hole in the fixture. A 1/2" wedge anchor is, in reality, slightly larger than 1/2".

Each wedge anchor diameter is available in a variety of lengths. The length required needs to be determined for each application and is dependent upon the thickness of the fixture to be fastened, plus the minimum embedment. To determine the length of anchor needed, simply add the thickness of the fixture to be fastened to the minimum embedment for the wedge anchor diameter being used, plus the thickness of the nut and washer (typically the diameter of the anchor is close to the thickness of the nut and washer).

This will give you the minimum length of anchor required. Using a longer wedge anchor than necessary will increase the holding values, but may increase your risk of drilling into rebar embedded in the concrete.

Wedge Anchor Installation

The installation of the concrete wedge anchor can be completed by following the steps below:

1. Determine the correct length of wedge anchor required to ensure that the minimum embedment is met and ensure that the wedge anchor fits through the hole in the fixture. The washer should also be larger than the fixture hole.

2. Using the hole in the fixture as a template, carefully drill your holes using a hammer drill and carbide-tipped masonry bit. The drill bit diameter should be the same as the wedge anchor's diameter. It is imperative that the hole be cleared of all dust and debris. This can be accomplished by using a wire brush, compressed air or vacuum.

3. Place the washer and nut on the anchor, turn the nut a couple of turns. Not fully threading the nut protects the threads of the wedge anchor when hammering into the hole.

4. Insert the wedge anchor into the hole through the hole in the fixture.

5. Carefully hammer the anchors into each hole ensuring that the threads go below the surface of the concrete or past the edge of the fixture, and that minimum embedment is met.

6. Tighten the nut - finger tight. Use a wrench to tighten the nut 3 or 4 turns, or use a torque wrench to ensure they are tightened to the required torque value. Do not over-torque, as the anchor will either spin in the hole or pull out of the hole.

Wedge Anchor Torque Values

Wedge anchors require a minimum torque to set. Do not tighten the nut as tight as possible. When setting a wedge anchor, it is important that the nut only be screwed on finger tight. Each anchor diameter has a required torque value to which it must be tightened.

Length Identification Chart

Once the anchor is properly set, all that is protruding above the concrete is the nut, washer, and a portion of the threads. The diameter of the embedded anchor can easily be determined by simply measuring the stud. The length of the anchor, however, can be difficult to determine because the depth of embedment may not be known. To help identify the length of an installed anchor, an identification code has been developed. A letter is stamped on the end of the threaded portion of the wedge anchor to easily determine the length of the wedge anchor after installation. This letter corresponds to the overall length of the anchor (in inches).

Wedge Anchor Material Specifications

Concrete wedge anchors are available in different types of steel as well as different plating. The type of steel and plating to use is based on the application's environment. Zinc-plated carbon steel wedge anchors are used in interior applications, where corrosion is not much of a factor. The anchor, nut, washer, and clip are all made of zinc-plated carbon steel. This type of plating is not recommended for use in ACQ treated lumber.

Hot-dipped galvanized wedge anchors are suited for exterior applications where corrosion from water or moisture is a concern. The anchor, nut, and washer are all made of carbon steel and are hot-dipped galvanized. The clip is made of 303 stainless steel. Hot-dipped galvanized wedge anchors are acceptable to use in ACQ treated lumber.

Wedge anchors are also produced in two grades of stainless steel. The 303 stainless steel has excellent corrosive characteristics for exterior applications and is resistant to many organic and inorganic chemicals, but should not be used in a salt water environment. The anchor is made from 303 stainless steel and the nut, washer, and clip are made of 18-8 stainless steel which is comparable to 303 stainless steel.

The 316 series of stainless steel has the best corrosion resistance and is typically used in harsh environments. The 316 stainless steel anchors can also be used in a salt water environment. All of the components in the 316 stainless steel wedge anchor are made from this resilient 316 steel.

Overview

Wedge anchor
is an excellent choice when anchoring into solid concrete. These anchors have excellent holding values and are available in a range of materials and plating to meet the requirements of many applications. It is important to make certain that the correct diameter and length are used in each application to ensure that the wedge anchor is set properly and safely.

Find Wedge Anchor On eBay Below:

Powers Fastener Wedge Bolt 1 2 x 2 07240 50 Box
Powers Fastener Wedge Bolt 1 2 x 2 07240 50 Box
$21.95
LOT of DOTTIE POWERS  Red Head Wedge Anchors 7416SD1 W14314 W38234 11015
LOT of DOTTIE POWERS Red Head Wedge Anchors 7416SD1 W14314 W38234 11015
$94.00
10 PC 1 2 x 4 1 4 Concrete Wedge Anchor Carbon Steel Simpson Strong Tie 50414
10 PC 1 2 x 4 1 4 Concrete Wedge Anchor Carbon Steel Simpson Strong Tie 50414
$20.25
LOT OF 9 1 2 x 5 1 2 Wedge Concrete Anchor RAMSET RED HEAD
LOT OF 9 1 2 x 5 1 2 Wedge Concrete Anchor RAMSET RED HEAD
$21.90
LOT OF 3 1 2 x 5 1 2 Wedge Concrete Anchor RAMSET RED HEAD
LOT OF 3 1 2 x 5 1 2 Wedge Concrete Anchor RAMSET RED HEAD
$14.99
Hilti 387513 Expansion Concrete Anchor 20X KB TZ 1 2x4 1 2 New In Box
Hilti 387513 Expansion Concrete Anchor 20X KB TZ 1 2x4 1 2 New In Box
$54.99
20 pcs 1 2 x 3 3 4 concrete expansion wedge anchor 3 4 socket size
20 pcs 1 2 x 3 3 4 concrete expansion wedge anchor 3 4 socket size
$30.00
LOT OF 6 3 8 x 3 3 4 Wedge Concrete Anchor RAMSET RED HEAD 50093
LOT OF 6 3 8 x 3 3 4 Wedge Concrete Anchor RAMSET RED HEAD 50093
$14.99
15 pcs 3 4 10 x 4 3 4 Concrete Expansion Wedge US Anchor
15 pcs 3 4 10 x 4 3 4 Concrete Expansion Wedge US Anchor
$30.00
7224sd 3 8 inch by 3 inch wedge bolt and blue tip large diameter screw anchor
7224sd 3 8 inch by 3 inch wedge bolt and blue tip large diameter screw anchor
$71.59
LOT OF 3 1 2 x 4 1 4 Wedge Concrete Anchor RAMSET RED HEAD 50096
LOT OF 3 1 2 x 4 1 4 Wedge Concrete Anchor RAMSET RED HEAD 50096
$12.99
Qty 17 1 2 x 5 Wedge Bolt Plus + Anchor Powers Fasteners  7748SD Galvanized
Qty 17 1 2 x 5 Wedge Bolt Plus + Anchor Powers Fasteners 7748SD Galvanized
$39.99
Concrete Drop In Anchors RL 34 with 3 4 Bolts Washers 3 4 Bolt Wedge Anchors
Concrete Drop In Anchors RL 34 with 3 4 Bolts Washers 3 4 Bolt Wedge Anchors
$20.21
10PK Simpson Strong Tie WA75614 Wedge All Anchor Stud Red Head 3 4 x 6 1 4
10PK Simpson Strong Tie WA75614 Wedge All Anchor Stud Red Head 3 4 x 6 1 4
$29.99
50 Pcs 3 8 x 3 3 4 ITW Red Head Concrete Wedge Anchor 304 Stainless Steel
50 Pcs 3 8 x 3 3 4 ITW Red Head Concrete Wedge Anchor 304 Stainless Steel
$49.50
QTY 50 1 2 x 4 1 4 Concrete Wedge Anchor Stainless Steel Grade 304
QTY 50 1 2 x 4 1 4 Concrete Wedge Anchor Stainless Steel Grade 304
$99.99
1 2x2 3 4Hex Carbon Steel Zinc Sleeve Anchor Wedge Masonry Concrete 25 pak
1 2x2 3 4Hex Carbon Steel Zinc Sleeve Anchor Wedge Masonry Concrete 25 pak
$25.00
Powers 7222SD 7222SD 3 8x2 1 2 Bolt Large Dia Screw Anchor Carbon Steel 50BX
Powers 7222SD 7222SD 3 8x2 1 2 Bolt Large Dia Screw Anchor Carbon Steel 50BX
$39.48
1 2 x 3 3 4 Concrete Wedge Anchor Stainless Steel WA503344SS 10
1 2 x 3 3 4 Concrete Wedge Anchor Stainless Steel WA503344SS 10
$29.50
3 4 10 x 6 1 4 steel wedge anchors zinc plated 20 count box
3 4 10 x 6 1 4 steel wedge anchors zinc plated 20 count box
$42.00
1 2 13 x 2 3 4 Hot Dipped Galvanized wedge anchors 25 count box
1 2 13 x 2 3 4 Hot Dipped Galvanized wedge anchors 25 count box
$40.00
3 8 16 x 2 1 4  steel wedge anchors zinc plated 100 count box
3 8 16 x 2 1 4 steel wedge anchors zinc plated 100 count box
$25.00
3 8 16 x 5  steel wedge anchors zinc plated 100 count box
3 8 16 x 5 steel wedge anchors zinc plated 100 count box
$32.00
1 2 13 x 3 3 4 steel wedge anchors zinc plated 50 count box
1 2 13 x 3 3 4 steel wedge anchors zinc plated 50 count box
$30.00
3 8 16 x 3  steel wedge anchors zinc plated 100 count box
3 8 16 x 3 steel wedge anchors zinc plated 100 count box
$28.00
3 4 10 x 4 1 4 steel wedge anchors zinc plated 40 count box
3 4 10 x 4 1 4 steel wedge anchors zinc plated 40 count box
$69.00
3 4 10 x 6 1 4 304 stainless steel wedge anchors 10 count box
3 4 10 x 6 1 4 304 stainless steel wedge anchors 10 count box
$92.00
5 8 11 x 8 1 2 steel wedge anchors zinc plated 25 count box
5 8 11 x 8 1 2 steel wedge anchors zinc plated 25 count box
$40.00
5 8 x 6 Concrete Wedge Anchor Zinc Simpson Strong Tie WA62600 20
5 8 x 6 Concrete Wedge Anchor Zinc Simpson Strong Tie WA62600 20
$36.75
3 4 10 x 4 1 4 steel wedge anchors zinc plated 20 count box
3 4 10 x 4 1 4 steel wedge anchors zinc plated 20 count box
$39.00
1 4 20 x 1 3 4 steel wedge anchors zinc plated 100 count box
1 4 20 x 1 3 4 steel wedge anchors zinc plated 100 count box
$15.00
3 4 10 x 7 steel wedge anchors zinc plated 20 count box
3 4 10 x 7 steel wedge anchors zinc plated 20 count box
$46.00
3 4 10 x 8 1 2 steel wedge anchors zinc plated 20 count box
3 4 10 x 8 1 2 steel wedge anchors zinc plated 20 count box
$48.00
1 2 13 x 2 3 4 steel wedge anchors zinc plated 50 count box
1 2 13 x 2 3 4 steel wedge anchors zinc plated 50 count box
$28.00
5 8 11 x 7 steel wedge anchors zinc plated 25 count box
5 8 11 x 7 steel wedge anchors zinc plated 25 count box
$38.00
1 2 13 x 7 steel wedge anchors zinc plated 25 count box
1 2 13 x 7 steel wedge anchors zinc plated 25 count box
$30.00
5 8 11 x 6 steel wedge anchors zinc plated 25 count box
5 8 11 x 6 steel wedge anchors zinc plated 25 count box
$32.00
3 4 10 x 6 1 4 Hot Dipped Galvanized wedge anchors 10 count box
3 4 10 x 6 1 4 Hot Dipped Galvanized wedge anchors 10 count box
$46.00
3 8 16 x 5  steel wedge anchors zinc plated 50 piece count box
3 8 16 x 5 steel wedge anchors zinc plated 50 piece count box
$18.00
5 8 11 x 3 1 2 steel wedge anchors zinc plated 25 count box
5 8 11 x 3 1 2 steel wedge anchors zinc plated 25 count box
$29.00


Recently Purchased Wedge Anchor:


11016 red head wedge anchor 38 in x 334 in 15per pack, 7220sd 38inch by 134inch wedgebolt and blue tip large diameter screw, 7226sd 38inch by 4inch wedgebolt and blue tip large diameter screw anchor, simpson wa62120ss all stainless wedge anchor w58x12 w2 thread 10pack, strong bolt stb262600 wedge anchor 58x6 20pc, powers 07218 12x5 orange tip wedgebolt screw anchor use ansi bit25box, simpson wa50334 12x334 2516 zinc plated steel wedgeall anchor25pc, strong bolt stb262100 wedge anchor 58x10 10box, qty 50 3 x 38 wedge bolt blue tip anchor fasteners 7224sd, lokbolt 38 x 1 78 steel zinc sleeve anchor wedge masonry concrete 10 count, 7242sd 12inch by 212inch wedgebolt and blue tip large diameter screw, simpson wa50414 12x414 21316 zinc plated steel wedgeall anchor25pc, 11017 red head wedge anchor 12 in x 334 in 10per pack, 371922 wedge anchor 14 x 214inch 100pack, new redhead box of 10 58 x 6 masonary wedge anchor bolts concrete 02041, 1 each wa62700 58 x 7 wedgeall wedge anchor nut washer simpson strongtie, powers 7600usa domestic 14x134 wedge expansion anchor type 316 ss 100box, strong bolt stb262700 wedge anchor 58x7 20pc, powers 7410sd1 powerstud amp; sd1 38x214 wedge expansion anchor 50box, powers 07313 powerstud 38x3 304 stainless wedge expansion anchor 50box, powers 7451sd1 powerstudamp;sd1 34x12 type cs wedge exp anchor cs clip10box, simpson wa50100ss all stainless steel wedge anchor 12x10 2 thread 25pack, powers 07363 powerstud1x9 type 304 ss wedge expansion anchor10box, strong bolt stb250512 wedge anchor 12inch by 512inch 25piece, itw ramsetred head trubolt wedge 38 x 5 50, box of 20 simpson strongtie 62412 wedge anchors 58 x 412, box of 20 simpson strongtie wa62600 wedge anchors 58 x 6, 12 x 2 12 hex carbon steel zinc sleeve anchor wedge masonry concrete, simpson strong tie wa62700mg wedgeall anchor 58 x 7 mech galv 20, 34x12 dia drill kb3 304ss stainless steel anchor bolts 10 per box 286029, new box of 10 red head trubolt 58 x 5 wedge anchors ws5850, qty 10 12 x 5 12 concrete wedge anchor stainless steel grade 304 , stainless steel 316 concrete wedge anchor 14 x 214 qty 50 ankrtite wejit, stainless steel 316 concrete wedge anchor 14 x 214 qty 25 ankrtite wejit, stainless steel 316 concrete wedge anchor 14 x 214 qty 10 ankrtite wejit, powers 7262sd 7262sd 58x4 wedge bolt large dia screw anchor carbon steel 25bx, powers 07312 powerstud 38x234 304 stainless wedge expansion anchor 50box, powers 7242sd 12x212 wedgeboltamp;blue tip large dia screw anchor cs50box, red head trubolt wedge anchor 14 x 2 14 ws1422 new 95pcs, red head ww3470 wedge anchor 34 x 7 stainless steel 10 pack, strong bolt stb237312 wedge anchor 38x312 50pc, strong bolt stb237300 wedge anchor 38x3 50pc, strong bolt stb250512 wedge anchor 12x512 25pc, strong bolt stb262500 wedge anchor 58x5 20pc, 20ea wa62700 58 x 7 wedgeall wedge anchors nuts washers simpson strongtie, simpson stb250334 strong bolt 2 wedge 25box anchor 12inch by 334inch 25bx, hilti 34 x 8 concrete wedge anchor stainless steel 4, hilti 12 x 512 wedge anchor 125pcs zinc, simpson strong tie wa75700 34inch by 7inch with 518inch thread length z, strong bolt stb237312 wedge anchor 38inch by 312inch 50piece, powers wedge bolts 38 x 4 12 40 concrete screw anchor, sleeve anchors 12 x 5 12 25 wedge type concrete anchors , simpson strong tie wa50812 12inch by 812inch with 6inch thread leng new, 3410 x 812 hot dipped galvanized wedge anchors 10 count box , 1213 x 512 hot dipped galvanized wedge anchors 25 count box , 3816 x 5 hot dipped galvanized wedge anchors 25 count box , 3410 x 414 hot dipped galvanized wedge anchors 10 count box , 3410 x 512 304 stainless steel wedge anchors 10 count box , 3410 x 414 304 stainless steel wedge anchors 10 count box , 5811 x 5 304 stainless steel wedge anchors 10 count box , 3410 x 512 hot dipped galvanized wedge anchors 10 count box , 5811 x 6 hot dipped galvanized wedge anchors 20 count box , 5811 x 5 hot dipped galvanized wedge anchors 20 count box , 3816 x 334 hot dipped galvanized wedge anchors 50 count box , 3816 x 3 hot dipped galvanized wedge anchors 50 count box , 1213 x 334 304 stainless steel wedge anchors 25 count box , 1213 x 414 hot dipped galvanized wedge anchors 25 count box , 3816 x 334 304 stainless steel wedge anchors 50 count box , 3816 x 234 304 stainless steel wedge anchors 50 count box , 3410 x 7 hot dipped galvanized wedge anchors 10 count box , 1213 x 512 304 stainless steel wedge anchors 25 count box , 1213 x 414 304 stainless steel wedge anchors 25 count box , 5811 x 6 304 stainless steel wedge anchors 10 count box , 3816 x 3 304 stainless steel wedge anchors 50 count box , 1213 x 334 hot dipped galvanized wedge anchors 25 count box , 234 carbon steel wedge anchor 38 anchor dia 50pk, box of 20 simpson strongtie stb262412 wedge anchors 58 x 412, strong bolt stb237700 wedge anchor 38x7 50pc, simpson wa62500 58x5 338 thread zinc plated steel wedgeall anchor20pc, simpson wa62500mg wedgeall anchor mechanically gal 5x58 dia 20box, new 60 suprstud wedge concrete anchor bolt 12 x 5 12 usa washers nuts, 25 powers 12 x 6 stainless 316 wedge anchor bolts, strong bolt stb250512 wedge anchor 12inch by 512inch 25piece, strong bolt stb250700 wedge anchor 12in by 7in 25pc new, strong bolt stb250512 wedge anchor 12in by 512in 25pc new, strong bolt stb250812 wedge anchor 12in by 812in 25pc new, strong bolt stb237312 wedge anchor 38in by 312in 50pc new, powers fastening 0 powerstud 38in by 3in type 304 ss wedge expansion anchor 50, 17 concrete wedge anchors stainless steel 34 x 5 long at 373, 240 each rawly hillman 12 on down concrete wedge anchor wall extra long, 5811 x 5 steel wedge anchors zinc plated 25 count box , 3816 x 5 304 stainless steel wedge anchors 25 count box , 1420 x 214 steel wedge anchors zinc plated 100 count , 1420 x 214 steel wedge anchors zinc plated 100 count box , 1213 x 512 steel wedge anchors zinc plated 50 count box , 1213 x 234 304 stainless steel wedge anchors 25 count box , 1213 x 414 steel wedge anchors zinc plated 50 count box



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