Some manufacturers publish ultimate holding values while others publish safe working load values. The standard blue Tapcon br In the case of concrete anchors, holding values are compromised. Sleeve Anchors. Ultimate-performance heavy-duty expansion stud anchor (A4 + ext. Move cursor over image to zoom. The other numbers on these charts that are important for comparisons are the embedment depths at which the anchors are tested. In the past, the nut was put on the wedge anchor to protect the threads and with the pull nose, this is unnecessary. The four parts made of the washer, the nut, the sleeve, and the stud. Different styles of concrete anchors are manufactured for specific applications and some are more versatile. I'm not positive but I think Hilti is one of the few (if only) manufacture to address this case for the new codes. Head Style These hardness are usually 2000psi, 3000psi and 4000psi. A wedge anchor is a mechanical type expansion anchor that consists of four parts: the threaded anchor body, the expansion clip, a nut, and a washer. Below is a chart indicating anchor size internal thread length, anchor length/minimum embedment and required hole size. Move cursor over image to zoom. Before inserting the anchor into the hole, clear the hole of all debris. For example, the nut and washer for a 5/8" anchor is approximately 5/8" high. Wedge anchors are designed not to be used in other masonry materials such as brick or hollow block. As for the anchor that you select, point it out to your reviewer. What is a wedge anchor? Headed Bolt chris3eb (Structural) 10 Dec 15 19:47. Anchor version Benefits . Expansion anchors in carbon steel and stainless steel, approved for cracked concrete, uncracked concrete and seismic – including stud anchors and sleeved anchors The hole should always be drilled using a hammer drill and carbide-tipped drill bit. Concrete ; Tensile zone ; Fire resistance . Building code approved. Each manufacturer's clip is slightly different and each claims that their clip is superior for various reasons. …, Purchase Anchors You can also choose from wedge anchor, expansion anchor, and drop-in anchor. These anchors provide the highest and most consistent holding values of any mechanical type expansion anchor. This anchor has various DOT approvals including Caltrans listing for "Stud Mechanical Expansion Anchors". If the two manufacturers' tables do not have the same psi testing, then generally the numbers can be straight line interpolated. by Legrand. Customers also searched for stud anchor, wedge anchor, stainless steel anchor, anchor bolt or stud anchor bolt View full product list (26) Features & Applications The simplest – and strongest – form of anchor bolt is cast-in-place, with its embedded end consisting of a standard hexagonal head bolt and washer, 90-bend, or some sort of forged or welded flange (see also Stud welding).The last are used in concrete-steel composite structures as shear connectors. Below is a chart outlining the minimum embedment for each strike anchor diameter: Example of how to correctly determine the length of the strike anchor needed for attaching a 1-1/2" thick fixture using a 1/2" diameter strike anchor: 1-1/2" (thickness of material) + 2" (minimum embedment) + 1/2" (space for nut/washer)= 4" minimum anchor length. Determining whether to use a concrete wedge anchor or strike anchor is simply a matter of personal preference. One method is to compare the different types and styles of concrete fasteners to meet the needs of the specific application. 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. To protect the threads of the wedge anchor, place the washer and thread the nut a couple of turns before hammering in the wedge anchor. Many of these features differentiate a specific brand or allow for benefits that the manufacturer feels is important. Wedge Anchors. For wedge anchors you have to be careful if you are working in cracked concrete. Real Anchor bolts are going to have more tensile pull out strength. Tapcon® concrete screws are also still made in the US as well. The safe working load is 25% of the ultimate load value. There are numerous ways to determine which concrete anchor to use. £25.28. document.getElementById("copyright_year").innerHTML = new Date().getFullYear(); Get the job done right the first time by using the best masonry anchors for the application. HST3 - Edge and Spacing, Part A. The term concrete anchor can also refer to an anchor that is to be used in a base material of concrete, brick or block. Term : Definition : Usage : Close Save changes × Add slang for Stud Wedge Anchor. HST Stud anchor 10 / 2012 135 values according ETAG 001, Annex C. To avoid this, it is recommended to use the anchor design software PROFIS anchor) The design method is based on the following simplification: No different loads are acting on individual anchors (no eccentricity) The values are valid for one anchor. Wedge anchors are available in three different lines This three-tier system is designed to make it easy for you to choose the right wedge anchor solution based on the performance, approvals and price needs, maximizing your overall productivity when setting anchors in cracked or un-cracked concrete. The head of the LDT is a hex washer with serrations under the hea Wedge anchors. Block Simpson Strong-Tie STB2-50512R10 1/2" x 5-1/2" Strong-Bolt2 Wedge Anchor 10ct. SKU: WA62120MG. Published by Mike C Pistorino on Feb 27th 2010, Purchase Strike AnchorsPurchase Drop-In AnchorsPurchase Wedge Anchors. It screws into an insert that expands. A concrete fastener is used in lighter duty applications and is available in diameters including 3/16", 1/4", 3/8" and 1/2". It is recommended that the nut is tightened utilizing a torque wrench to ensure that it is tightened to the required torque value. The anchor is properly set when the head of the pin meets the stud. The anchor is properly set when the head of the pin meets the stud. Wedge anchors. Before starting any fastening project, it is important to understand the factors that need to be considered when comparing the different types and styles of concrete anchors. Move cursor over image to zoom. …, Purchase Anchors The bullnose on the wedge anchor is another feature that has been added over the years. 3/4" x 4-3/4" Red Head Trubolt Wedge Anchor, Galvanized, Pkg 10. Install like a stud anchor— just thread the anchor, a nut, and a washer onto the end of a threaded rod, drive into a hole, and turn the nut to expand the base. This pulls the anchor up, wedging the clip between the steel of the wedge anchor and the concrete. Log … Headed Bolt chris3eb (Structural) 10 Dec 15 19:47. Customers also searched for stud anchor, wedge anchor, stainless steel anchor, anchor bolt or stud anchor bolt View full product list (26) Features & Applications The top supplying country or region is China, which supply 100% of stud wedge anchor respectively. Strike Anchor Types The strike anchor is the only other male anchor that is designed for use in solid concrete only. Threaded studs are set by tightening the nut to the specified torque. The distinction is made here simply to explain the difference between the two. Power Stud® Wedge Anchor STAINLESS STEEL $2.15 - $5.16. Wedge anchors. Add to Cart Add to Cart. Product Description. However, they tend to be slightly longer and optimized for use in bricks (primarily because they do not expand upon the insertion of a bolt. Wedge anchors. Welcome to Concrete Fastening Systems, Inc.! Adhesive Anchors. Types of Wedge Anchors Concrete wedge anchors are made from zinc-plated carbon steel, hot-dipped galvanized carbon steel, 303 stainless steel or 316 stainless steel. There are three. HST3; Move cursor over image to zoom. Expansion anchors in carbon steel and stainless steel, approved for cracked concrete, uncracked concrete and seismic – including stud anchors and sleeved anchors Drilling a Hole for a Concrete Wedge Anchor The diameter of the hole to be drilled in the concrete is the same diameter as the wedge anchor being used. Previously, all wedge anchors had a specific thread length for each different length of the anchor. A non-bottom-bearing, wedge-style expansion anchor for use in solid concrete or grout-filled masonry. How hard wedge anchors would be is completely up to what tools you own. FastenersClearingHouse.com, The FCH Network, your source for Wedge Stud Anchor, SEARCH for FASTENERS: JOIN the NETWORK: CLOSEOUTS: HOW it WORKS: NEWS: FAQ: TECHNICAL: RADIO: LOGIN to FCH : Advertisement : SEARCH RESULTS: 4,117 Wedge Stud Anchor, showing 200 Trademarks identified with products listed on this website are the property of their respective owners, not … A mason Then, with the nut, washer, and set-pin in place, insert the strike anchor into the hole. Once in place, the anchor is set into the concrete by tightening the nut. Drop-In Anchor Diameters There are five diameters of drop-in anchors available- 1/4", 3/8", 1/2", 5/8" and 3/4". The diameter of the drop-in anchor refers to the inside diameter or the diameter of the bolt/threaded rod that is inserted into it. http://www.confast.com/ Horiznext Wedge Anchor, for Cement and Concrete only, Galvanized Carbon Steel Screws and lag Bolts. A concrete anchor will work better in some applications while at other times concrete fasteners should be used to complete the job. Quantity: Add to Cart. by Horiznext. The anchor body is threaded, and can be installed by inserting it into a … Save 10%. The Allfasteners Wedge Anchor is a torque-controlled, wedge expansion anchor for heavy duty fastening applications where high pull out values in concrete are needed. A concrete fastener of any type only holds as well as the base material in which it has been fastened. Zinc plated carbon steel offers some basic rust resistance, 304 stainless steel affords better rust resistance and 316 stainless steel provides superior rust resistance. These concrete anchors will be the focus of this article. Power-Stud ® + SD2 High Performance Wedge Expansion Anchor Print The Power-Stud+ SD2 anchor is a fully threaded, torque-controlled, wedge expansion anchor which is designed for consistent performance in cracked and uncracked concrete. Before inserting the anchor into the hole, clear the hole of all debris. £14.65 - £107.13. …, Purchase Tapcons Drilling Holes for Concrete Strike Anchors The appropriate diameter of the hole to be drilled in the concrete is the same diameter as the anchor being used. When comparing the same type of concrete anchor from one manufacturer to another in terms of pull out or shear values, it is important that the numbers are in a form that can be compared. Wedge anchors. Suitable base materials are normal-weight and sand-lightweight concrete, concrete over steel deck, and grouted concrete masonry. …, Purchase LDTs Cleveland, OH 44114 HST-HCR High corrosion resistance steel - suitable for non-cracked and cracked concrete C 20/25 to C 50/60 - quick and simple setting operation - safety wedge for certain follow up expansion. Insert the properly sized setting tool into the anchor and strike the tool until the lip of the anchor touches the lip of the setting tool. Before starting any project, be certain to choose the one that will finish the job in the most effective and safe manner possible. The wedge and strike anchors are both male, or stud, type anchors, and the drop-in anchor is a female type anchor. Shock ; Seismic . These anchors are excellent for indoor use or in a location where moisture is not present. United States of America, CONFAST® 304 Stainless Steel Wedge Anchors, CONFAST® 316 Stainless Steel Wedge Anchors, American Hot-Dipped Galvanized ThunderStud Anchor, American 303 Stainless Steel ThunderStud Anchors, American 316 Stainless Steel ThunderStud Anchors, RedHead Trubolt Wedge Anchors - Galvanized, RedHead Trubolt 304 Stainless Steel Wedge Anchors, RedHead Trubolt Wedge Anchors 316 Stainless Steel, Red Head Trubolt+ seismic cracked and uncracked, CONFAST® Zinc Plated Hex Head Sleeve Anchor, CONFAST® Zinc Plated Acorn Head Sleeve Anchor, CONFAST® Zinc Plated Flat Head Sleeve Anchor, CONFAST® Zinc Plated Round Head Sleeve Anchor, CONFAST 304 Stainless Steel Acorn Sleeve Anchor, CONFAST® 304 Stainless Steel Hex Sleeve Anchor, CONFAST 304 Stainless Steel Flat Sleeve Anchors, CONFAST® 304 Stainless Steel Drop-In Anchor, CONFAST® 316 Stainless Steel Drop-In Anchor, 316 Stainless Steel American Made Drop-In Anchors, Hammer Drive Anchor with Stainless Steel Nail, 410 Stainless Steel Tapcons Concrete Screws, All 410 Stainless Steel Tapcons Concrete Screws, 410 Stainless Steel Large Diameter Tapcon®, different types and styles of concrete fasteners. Different geographic locations may require specific requirements for the use of fasteners being used in that area. The information derived from the process is valuable and can be essential when using a product. To set the anchor, simply drop the anchor into the hole and tap lightly with a hammer until the anchor is flush with the base material. Drop-in anchors are manufactured from carbon steel that is zinc plated and are also available in 304 or 316 stainless steel. 1231 E. 26th St Expansion anchors in carbon steel and stainless steel, approved for cracked concrete, uncracked concrete and seismic – including stud anchors and sleeved anchors As well as from gb. The Wedge-All is code listed for grout-filled masonry applications. Because many of these anchors can be used in brick and block, they are sometimes described as masonry anchors. £25.76 - £56.47. MSRP: 0 reviews wedge bolt size. Only 17 left in stock (more on the way). Based on the lengths available, the correct size for the above application would be a 1/2" x 4-3/4" strike anchor. 19 Products Approvals / test reports. Making the choice between carbon zinc and stainless steel depends entirely upon the end use and degree of rust resistance required. Also known as rod anchors, they're often used with threaded rod to hang pipe and wiring. Uses FREE Shipping by Amazon. The more versatile a concrete anchor is, the less the holding values are compared to a less versatile fastener. Top Definition. Always be careful when handling any power tools and wear appropriate safety gear such as goggles. Determining whether to use a concrete wedge anchor or strike anchor is simply a matter of personal preference. $34.22. These diameters include 5/8", 3/4", 7/8", 1" and 1-1/4". Customers also searched for stud anchor, wedge anchor, hot dip galvanized, anchor bolt or stud anchor bolt View full product list (20) Features & Applications More options available. Throughout this article, the terms will be used interchangeably. With concrete anchors, deeper embedments result in better holding values. Wedge anchors. Should I use a Wedge or Strike Anchor? Each unique application will demand concrete anchors with specific features. The simplest – and strongest – form of anchor bolt is cast-in-place, with its embedded end consisting of a standard hexagonal head bolt and washer, 90-bend, or some sort of forged or welded flange (see also Stud welding).The last are used in concrete-steel composite structures as shear connectors. Zinc plated carbon steel offers some rust resistance, hot-dipped galvanized anchors are excellent rust resistors while the 303 and 316 stainless steel fasteners provide superior rust resistance. The length of the anchor required is determined by adding the thickness of the material being fastened, the minimum embedment for the diameter of the anchor being used and the height of the nut and washer. 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. Customers also searched for expansion anchor, anchoring in uncracked concrete, anchoring medium loads, anchors or anchoring View full product list (9) Features & Applications Power-Stud ® + SD1 Wedge Expansion Anchor. An epoxy adhesive anchor, or chemical, is basically glued to the concrete. Concrete Fastening Systems, Inc. These concrete anchors will be the focus of this article. Overview More details Filter Start Over. Most tables have a number of different hardness of concrete that the anchors are tested in. The height of the nut and washer is roughly equal to the diameter of the wedge anchor itself. New Slang : Close Add. Below is an outline of the different types of wedge anchors: Zinc plated wedge anchors provide the least rust resistance and are the least costly but are not recommended for outdoor use. You should be attaching a counter sunk PT sole plate to the concrete, then stand your pre-framed wall up and fasten to the sole plate. During installation, the threads can be damaged when pounding the wedge anchor into the concrete. Versatility in a concrete anchor relates to the number of different types of base materials that it can be used in. AEFAC Technical Note TN07-22/07/14-D2 Page 2 of 7 Cast-in anchor – headed bolt, headed stud, hooked bolt or anchor channel installed before placing the concrete. 5/8" x 12" Strong-Tie Wedge-All Anchor, Galvanized Steel, Pkg 10. Sign up today to get the latest updates on new products and upcoming sales, Sign up now to receive exclusive discount offers via email, Concrete Anchors That Should Only Be Used in Solid Concrete, CONFAST® 304 Stainless Steel Wedge Anchors, CONFAST® 316 Stainless Steel Wedge Anchors, American Hot-Dipped Galvanized Thunderstud Anchor, American 303 Stainless Steel Thunderstud Anchors, American 316 Stainless Steel Thunderstud Anchors, RedHead Trubolt Wedge Anchors - Galvanized, RedHead Trubolt 304 Stainless Steel Wedge Anchors, RedHead Trubolt Wedge Anchors 316 Stainless Steel, CONFAST® Zinc Plated Hex Head Sleeve Anchor, CONFAST® 304 Stainless Steel Hex Sleeve Anchor, CONFAST® Zinc Plated Acorn Head Sleeve Anchor, CONFAST 304 Stainless Steel Acorn Sleeve Anchor, CONFAST® Zinc Plated Flat Head Sleeve Anchor, CONFAST 304 Stainless Steel Flat Sleeve Anchors, CONFAST® 304 Stainless Steel Drop-In Anchor, CONFAST® 316 Stainless Steel Drop-In Anchor, 316 Stainless Steel American Made Drop-In Anchors, Hammer Drive Anchor with Stainless Steel Nail, CONFAST® Mushroom Head Nylon Nail-It Anchor, 410 Stainless Steel Tapcons Concrete Screws, All 410 Stainless Steel Tapcons Concrete Screws, 410 Stainless Steel Large Diameter Tapcon®, Determine which Concrete Anchor/Fastener to use. Click on image to zoom. Unlike concrete wedge anchors, the strike anchor is not available in hot-dipped galvanized or stainless steel. The wedge anchor can only be used in solid concrete. headed stud - a steel anchor conforming to the requirements of AWS D1.1 and affixed to a plate or similar steel attachment by the stud arc welding process before casting, also referred to as a welded headed stud. They provide the best, most consistent holding values among these types of fasteners. Using a properly sized hammer, set the pin with several sharp and square strikes on the head of the pin until it is flush with the top of the anchor. Sizing of Strike Anchors Strike anchors are available in six different diameters ranging from 1/4" to 3/4". RE: Anchors: Threaded Rod vs. Carefully hammer the wedge anchor into the hole to the desired depth. Hilti Wedge anchors - HSA-F - Standard hot-dip galvanized stud anchor. I prefer epoxy, ran into too many oversized holes when workingwith wedge anchors. Ultimate-performance heavy-duty expansion stud anchor with approvals for safety-relevant applications in concrete (carbon steel, external thread) Material, corrosion: Carbon steel, zinc-plated ; Head configuration: Externally threaded; Approvals / test reports: BZS/shock, ETA, Fatigue, Fire, ICC-ES report (concrete), Seismic, VDS; From £101.54. UCAN TZ torque controlled mechanical expansion wedge anchors have a Category 1 classification. This motion pulls your wedge anchor up and sets the clip between the steel stud and the concrete. Expansion anchors in carbon steel and stainless steel, approved for cracked concrete, uncracked concrete and seismic – including stud anchors and sleeved anchors All prices include VAT. Expansion anchors in carbon steel and stainless steel, approved for cracked concrete, uncracked concrete and seismic – including stud anchors and sleeved anchors Wedge anchors are also more popular merely due to the availability of a larger variety of diameters, lengths, and materials. As far as standing up the wall, You are making it way harder than it needs to be. Sign up now to receive exclusive discount offers via email. page 2 February 2013 Product Data Sheet HSA stud anchor Approvals / certificates Description Authority / Laboratory No. Types of Concrete Drop-In Anchors The drop in anchor is the only female type anchor for use in solid concrete only. Thanks . There are 181 stud wedge anchor suppliers, mainly located in Asia. The Crete-Flex screw is manufactured from a 410 stainless steel for ConFlex® is the brand name for Elco's concrete screws, which are American …, Purchase Tapcons When should I use one? The Power-Stud® anchor is a fully threaded, torque-controlled, wedge expansion, stainless steel anchor. Concrete Fasteners, Inc. 1231 E 26th St Cleveland, OH 44114 United States of America Call us: 1-216-357-7433 The Wedge-All wedge anchor is available in carbon steel with zinc or mechanically galvanized coating, as well as Types 303/304 and Type 316 stainless steel. 5 out of 5 stars 1. But the manufacturing process changed and wedge anchors are now made using different machines. The Power-Stud+ SD1 is a fully threaded, torque controlled, wedge expansion anchor that is designed for concrete applications. Prior to installing a wood floor, the building sh Before inserting the anchor into the hole, clear the hole of all debris. They are not as strong as wedge anchors when … …. These numbers refer to the strength of the concrete measured in pounds per square inch (psi). DaveAtkins (Structural) 9 Nov 06 07:50. Suitable base materials are normal-weight and sand-lightweight concrete, concrete over steel deck, and grouted concrete masonry. In my limited experence it appears wedge anchor would be used in overhead or vertical situations and epoxy anchors on horizontal applications. …, Fastening to Cinder Both anchors have essentially the same holding values. / date of issue European technical approval a) DIBt, Berlin ETA-11/0374 / 2012-07-19 Fire test report IBMB, Brunswick 3215/229/12 / 2012-08-09 The Concrete Wedge Anchor For example, the nut and washer for a 5/8" diameter nut is approximately 5/8" high. Cinder block UCAN TZ torque controlled mechanical expansion wedge anchors have a Category 1 classification. And whether stud wedge anchor is steel, or iron. Compare (1) HSL-3-SKR New. Concrete sleeve anchors can be used in concrete, brick or block but their holding values are less in terms of shear and pullout values. To compare the two, either multiply the safe working load numbers by 4 or divide the ultimate loads by 4. read more... Quality Enterprises. During installation, the threads can be damaged when pounding the wedge anchor into the concrete. A self-tapping screw is a screw that taps its own threads when scr Hilti Wedge anchors - HSA - High-performance wedge anchor for everyday static in uncracked concrete (carbon steel) When it comes to approvals for concrete fasteners, it is basically a process that a manufacturer pays for and receives. Moisture Considerations Each diameter is only available in one length and the minimum embedment for each anchor diameter is equal to the length of the anchor. The Power-Stud+ SD1 is a fully threaded, torque controlled, wedge expansion anchor that is designed for concrete applications. FAZ II Anchor Bolts with Large Washer . 19 Products All prices include VAT. This anchor has various DOT approvals including Caltrans listing for "Stud Mechanical Expansion Anchors". This will provide numbers that can be compared. These are the wedge anchor, drop-in anchor and the strike anchor. The many considerations for choosing the proper cement screw to use for an Strike Anchors are manufactured from carbon steel with yellow zinc plating. Eligible for FREE UK Delivery. When dealing with male anchors, hole size is equal to anchor size (with the exception of the Tapcon® screw). Show more. The drop-in anchor is designed to sit flush with the concrete base material and requires that a bolt or threaded rod be inserted into it. Customers also searched for expansion anchor, anchoring in uncracked concrete, anchoring medium loads, anchors or anchoring View full product list (9) Features & Applications Expansion anchors in carbon steel and stainless steel, approved for cracked concrete, uncracked concrete and seismic – including stud anchors and sleeved anchors. The hole should always be drilled using a hammer drill and a carbide-tipped drill bit. Vyttila, Kochi, Dist. Wedge anchors. SKU: WA62500MG. Ultimate-performance wedge anchor with approvals for cracked concrete and seismic (A4 stainless steel) Material, corrosion: Stainless Steel, 316; Head configuration: Externally threaded ; Approvals / Test reports: ICC-ES report (concrete), LABC, Nuclear (NQA-1) From $574.00. Only a few are manufactured in the US. The method of implementing these anchors is a little bit different than the one previously discussed but then again the professionals who do them would have mastered the process regardless. Expansion anchors in carbon steel and stainless steel, approved for cracked concrete, uncracked concrete and seismic – including stud anchors and sleeved anchors Determining which of these fasteners to use is dependent upon the application, the amount of rust resistance required desired finished look and personal preference. Wedge Anchor (315) Special Interest Clearance Item (23) Fastenal Brands (45) MFG in the USA (30) Trade Agreement Act (27) Promotional Items (301) Wedge Anchors. thread) Material, corrosion: Stainless steel, A4; Head configuration: Externally threaded; Drilling method (AS): Hammer drilling ; From HKD 294.27. So with this information, to determine the length of wedge anchor required for a 5/8" diameter wedge anchor fastening a 2" thick fixture, one would use the following formula: 2" (thickness of material) + 2-3/4" (minimum embedment) + 5/8" (space for nut & washer) = 5-3/8" minimum anchor length. Wedge anchors are designed to anchor objects into concrete. Making sure that the holding values compared from the same psi concrete are important because of the stronger the concrete- the better the holding values of the anchors. HST Stud anchor 10 / 2012 130 HST Stud anchor . The cost of wedge anchors increases the more rust resistance it offers. Slang . Compare (1) Kwik Bolt TZ carbon steel Ultimate. How to install concrete wedge anchors. Screw Anchors. Edit Stud Wedge Anchor. …, Purchase Concrete Screws Sturdy Gun Safe Manufacturing- Showing Terry Pratt- www.sturdysafe.com The bullnose on the wedge anchor is another feature that has been added over the years. $63.20 Add to Cart Add to Cart. …, Purchase Anchors More Buying Choices $13.23 (3 new offers) The Hillman Group 371952 Wedge Anchor, 5/8 X 7-Inch, 10-Pack. A wedge anchor is a mechanical type expansion anchor that consists of four parts: the threaded anchor body, the expansion clip, a nut, and a washer. The terms "concrete anchor" and "concrete fastener" are generally used interchangeably although, by definition, they are not the same. They are installed into a pre-drilled hole, then the wedge is expanded by tightening the nut to securely anchor into the concrete.