Anchor bolts are more than wall-to-sill connectors; they serve as your structure's primary form of resistance against several types of building loads. This will result in some extra wedge anchor are transferred to the material in which it is installed. Anchors are located a minimum of 15 anchor diameters from the edge of the concrete perpendicular to the length of … Anchor flange must seat firmly against concrete. bolts and expansion anchors, secure themselves to concrete using a ScreeDemon Battery Powered Vibratory Concrete Screed, What I Wear to Pour Concrete- Safety Gear for Concrete. RM, RL or CL-Carbon or SRM-18-8 S.S. or SSRM-316 S.S. Multi-Set II Drop-In Anchors Recommended Edge and Spacing Distance … able to be cleaned out of the hole. Valuable Tips and insights. eval(ez_write_tag([[320,50],'everything_about_concrete_com-banner-1','ezslot_3',114,'0','0']));As a rule of thumb, the concrete anchor industry has For each type of anchor, a spacing distance between anchors is specified. thickness of the material being fastened. Observe minimum edge distance and spacing requirements. Concrete or Masonry Walls. Check out the video below to learn how to install concrete wedge anchors. Site Map | Privacy Policy | RSS.  concrete fasteners that must be inserted into a pilot or predrilled. 3.2. interaction of the forces, thus reducing the holding power of the Browse the most current issue of Windpower Engineering & Development and back issues in an easy to use high quality format. value. concrete, providing the strength. Tighten the nut The fasteners used for holding these categories of static loads come in a variety of types and sizes. When vibration or sudden impact are part of the load condition anchor The sill must be level and straight. It is often necessary to fasten cables, wires, junction boxes, and monitoring instruments to the inside and outside of concrete walls. case, anchor bolts in braced wall lines (described in Chapter 6) require 3 -inch by 3-inch plate washers approximately ¼ inch thick to increase the holding capacity against the sill plate or bottom plate (Fig ure 5-14). while a 3/4-in. Figure 2.1 Concrete member, anchor spacing and edge distance 3 Design and safety concept 3.1 General The design of anchorages shall be in accordance with the general rules given in EN 1990. It shall be shown that the value of the design actions Sd does not exceed the value of the design resistance Rd. 3. driven up against a sleeve which jams the end of the bolt into the Hole size is equal to the anchor size. • If installed too close to an unsupported concrete edge, concrete anchors may depreciate the force and lower the holding values. They should be at least an inch deep. Click here to read our PRIVACY POLICY and our DISCLAIMER NOTICE.  are packaged complete with nuts and washers ready to install. A rule-of-thumb in the concrete-fastener industry is that the minimum spacing should be 10 diameters from each anchor, and measured center to center. into the hole. anchors. Select the right concrete anchors and adhesives. Use a good concrete bit to drill the anchor holes. Go from Concrete anchors to Concrete Products. Anchor reinforcement is reinforcement used to transfer the full design load from the anchors into the structural member. Concrete Cone Failure occurs when the concrete surrounding an anchor fails, typically in a cone shape similar to the diagram below. This means holding forces could approach zero or blow-out the concrete when the anchor is expanded. Tension-free spacing installation anchor for dry, ridge fixing and for attaching window frames, door castings or substructures. Table C-5A is based on the capacity of the anchor bolt in a properly designed concrete or ma-sonry foundation system. When concrete is used in tower construction, it is important to consider the placement of rebar and particularly in precast panels. the concrete should be the length of the wedge anchor minus the Concrete cone or concrete splitting resistance NRd,c = fB • N*Rd,c N*Rd,c is obtained from the relevant design tables f B influence of concrete strength on concrete cone resistance Concrete Strengths f’c,cyl (MPa) 20 25 32 40 50 fB 0.79 0.87 1.00 1.11 1.22 Design steel resistance (tension) NRd,s Anchor size M8 M10 … Tap anchor into hole using a hammer. Also, check the distance from the edge of the foundation wall. Anchor Configurations Some other considerations in anchor selection are how close the anchors will be placed to the edge of the concrete, the spacing between anchors, and the thickness of the substrate. Wedge anchors, also known as expansion The tightening of the bolt results in a wedge being Versions in 304 and 316 stainless steel are also available. Tapcon screws are another type of concrete fastener. How To Stamp A Concrete Patio - Learn From Mike Day's Training Course, Concrete Mixing Ratios - How To Make Concrete (Cement, Sand, Stone), Ready Mix Concrete Suppliers - All 50 States Local Ready Mix Near Me, New! Explanation: If set too close to an unsupported edge, the outward pressure of the concrete anchor will decrease the holding value of the anchor or make it non-existent. Attachment is the structural assembly, external to the surface of … 3.3. e N′ = distance between resultant tension load on a group of anchors loaded in tension and the As a rule of thumb, the concrete anchor industry has minimum anchor length required, simply add minimum embedment, plus Versions in 304 and 316 stainless steel are also available. Anchors are embedded into concrete a minimum of 7 inches (178 mm). CONCRETE CAPACITY DESIGN (CCD) METHOD—EMBEDMENT DESIGN EXAMPLES 349.2R-3 d t = distance from center of tension force in anchors and adjacent edge of supported steel member, in. securing to it. ... Full ultimate strength of anchor can be achieved at listed embedment depth, provided there are no edge or spacing effects on the anchor. All 50 states are listed with phone numbers and website links. A. For indoor or dry applications, standard zinc-plated carbon steel is sufficient. Much lower noise and vibration to screed concrete. Watch and learn from multiple training videos. Hi, I am Mike Day, owner of Day’s Concrete Floors, Inc. in Maine,  where I've been working with concrete for 40 years now, and this website is where I can share with you all the knowledge and wisdom I've gained from installing all kinds of decorative concrete, concrete floors, concrete overlays, stained concrete and also fixing cracked or spalled concrete. Figure 1-5.—Methods of sill fastening to foundations. hole and the ¼-in. mechanical wedging effect at the end of the anchor. Adjustable anchors are the only types allowed with steel stud backup and concrete backup, due to deflection of the two walls. If you're planning to build a wall on top of a concrete slab, you'll need to use a specific type of fastener to anchor the wall in place. screw requires a 5/32-in. A safety factor of 4:1 or 25% is generally accepted as a safe working load. Linear interpolation may be used for intermediate spacing and edge distances. As a rule of thumb, the expansion anchor industry has established a minimum standard of ten (10) anchor diameters for spacing between anchors and five (5) anchor diameters from any unsupported edge. 1. Reference should be made to applicable codes for the specific working ratio. The hole tolerance is critical, 3/16-in. Anchor spacing is centerline-to-centerline distance between loaded anchors. The fasteners used for holding these categories of static loads come in a variety of types and sizes. Figure 1-6.—Spacing of anchor bolts. Less Than 10 Anchor Minimum Spacing. and are manufactured in zinc-plated, 304 stainless steel, and 316 stainless steel. However, taking the same diameter of all the concrete fasteners and embedding each into the same concrete at the same depth will produce similar holding values. hole and the ¼-in. things to concrete and masonry. depending on the condition of the concrete and the type of load you are screw requires a 3/16-in. Insert the anchor through the fixture and into the hole. FREE CONCRETE FINISHING TRAINING TUTORIAL VIDEO.  internally threaded concrete anchors and manufactured from carbon steel and zinc-plated. • Wedge anchors provide the widest range of concrete fasteners, from 1/4 to 1-1/4-in. 1.3.3.3 Anchor group Two or more anchors having the same characteristics whose spacing … According to the International Building Code (IBC), the maximum spacing allowed is 6 feet (1829 mm) on center for exterior wall wood sole and sill plates supported directly on masonry or concrete foundations. Clear the hole The function of the anchor is to transmit load from a fixture to the connected concrete member. If the anchors are installed too close together, it can cause an Concrete wedge anchors are used to fasten or secure many different kinds of provide a variation to the wedging action for you to choose from, screw requires a 5/32-in. If the anchor will not install completely, remove the anchor and ensure that all dust has been evacuated or drill the hole deeper. Pre drill the treated base plate for the anchors, counter sink them a 1/4 inch, then lay a heavy bead of construction adhesive under the plate. The spacing from an unsupported edge should be at least five-anchor diameters. Many different manufactures for the universal wedge clip on the anchor stud. Psi values refer to a compressive strength of concrete using standard test cylinders of six-in. • Know specifics related to proof loading of adhesive anchors: triggers for proof loading … Epoxy dowels are ideal for static loads, shear loads or applications that require close spacing and edge distances. For example, a 1/4-in. Hole size is equal to the anchor size. with a torque wrench to ensure it is tightened to the required torque established a minimum standard of ten (10) anchor diameters for spacing Low spots can be shimmied with wooden … height. The load bearing capacity of an anchor is influenced by an adjacent anchor. Concrete Wedge Anchors can be now be installed easily: On the concrete, mark where your holes will be drilled. *Spacing and edge distances shall be divided by 0.75 when anchors are placed in structural lightweight concrete. 3. Mark location for anchor. Epoxy anchors are capable of reaching high bond-stress values in … wedge anchor, the mounting hole in the fixture should afford clearance When vibration or sudden impact are part of the load condition anchor spacing should be increased. This failure mode is applicable for Cast In, Mechanical Fasteners and Chemical Anchors.The CivilWeb Concrete Anchorage Design Spreadsheet completes all the calculations detailed below for cast in anchors, mechanical anchors and chemically bonded anchors … anchor can have a minimum embedment of be 3-1/4 in. Cast-in anchors are threaded shafts with a buried end termination of a hex head, threaded nut, or 90° (L-) or 180° (J-) hook, or headed (non-threaded) studs welded to a surface plate. spacing should be increased. bit the same diameter as the wedge anchor. • Also, as selection diameter increases, so must the minimum embedment depth. dia. Chemical Anchors - Epoxy and Hybrid Adhesives Mechanical Concrete Anchors Cast-in Anchor Channel Cast-In Anchors. • Expansion concrete anchors exert an outward or radial force. When this force overlaps with another anchor, it decreases the holding values of both fasteners. Post-Installed Concrete Anchor Installation Inspector Approved August 2018 1 of 5 The JTA is a detailed list of specific points of general knowledge (understanding concepts) ... • Know minimum center-to-center spacing requirement. 6. To select the most effective fastener for securing wind-turbine equipment to concrete, it is important to consider these several conditions. For buildings over two stories in height, the maximum spacing decreases to 4 feet on center (1219 mm). The To help you decide which wall fastener to use on concrete, we've outlined all the options … The required anchor embedment is the distance from the concrete surface to the bottom of the anchor. The embedment length of headed bolts, lb, is measured parallel to the bolt axis from the surface of the masonry to the bolt head bearing surface. depth to accommodate a minor amount of concrete dust which may not be and are manufactured in zinc-plated, 304 stainless steel, and 316 stainless steel. For each fastener design, the company provides a table of related dimensions and load values. concrete. t is often necessary to fasten cables, wires, junction boxes, and monitoring instruments to the inside and outside of concrete walls. All Rights Reserved. Concrete Wedge Anchor - Anchor Spacing: The forces on a install the washers and nuts. The spacing from an unsupported edge should be at … As the nuts are tightened, make sure the sills are properly aligned. wedge anchor requires no maximum hole depth. The hole tolerance is critical, 3/16-in. When considering load requirements for concrete fasteners, account for the weight of each item and how many fasteners the load requires. Load tables provide general guidance and are not a guarantee of accuracy. Tighten the nut When vibration or sudden impact are part of the load condition anchor • If rebar is too close to the surface, it may affect the placement or size of the selected concrete fastener. As a rule of thumb, the expansion anchor industry has established a minimum standard of ten (10) anchor diameters for spacing between anchors and five (5) anchor diameters from an unsupported edge. The depth of the hole in able to be cleaned out of the hole. Horizontal shear ca-pacity for a specific spacing of anchor bolts is based on bearing of the anchor bolt against concrete or grout: Fbrg = 0.35 × fc’ = 0.35 × 2500psi = 875psi. A concrete anchor is a steel shaft either cast into concrete at placement or post-installed after the concrete has hardened. Drill 11/16", 18mm, or 3/4" diameter hole to a depth of 4 1/8 inches. A table of loads is available for every concrete fastener, which describes the average values of pull out and shear for each diameter at the minimum embedment depth. The NEW ScreeDemon from MBW Inc is powered by a M-18 Lithium Ion Milwaukee battery. value. There’s a lot to cover, so if you have any questions, contact me! screw requires a 3/16-in. I nail up my framing on the basement floor and then stand it up on the base plate and nail in place. As with the masonry walls, veneer adjustable anchors maximum misalignment of bed joints is 1.25 inch, the clearance between the connecting parts cannot exceed 1/16 inch, and wire ties must be nine … The hole.Â, DTE Energy to buy three new Michigan wind farms, Connecticut seeking input on draft solicitation for offshore wind, Maine establishes three new renewable energy laws, US Wind applauds extension of offshore wind tax credit. Here are some of the different size wedge anchors: Disclaimer: If you purchase a wedge anchor or drill bit from amazon within 24 hours of using one of my links, I well receive a small commission from the sale. Using the wrong size carbide bit to drill the hole. thickness of the material being fastened. Learn how to install different types of anchors in concrete and brick, using a hammer drill. As a rule of thumb, the concrete anchor industry has established a minimum standard of ten (10) anchor diameters for spacing between anchors and five (5) anchor diameters from an unsupported edge. Robert Carlisle / President / Concrete Fastening Systems, Robert CarlislePresidentConcrete Fastening. After a hole is drilled into the concrete, the Hilti wedge anchor is tapped of all debris, then place the wedge anchor through the hole in the An important question to answer before selecting a fastener relates to exposure: Will the fastener be exposed to rain and moisture or will it be protected from the elements inside a wind tower? spacing should be increased. Concrete mixing ratios for cement, sand, aggregate, and water are mixed as 1 part cement, 3 parts sand, and 3 parts stone with enough water to make it workable. Anchors are located a minimum of 1 3 / 4 inches (45 mm) from the edge of the concrete parallel to the length of the track. Sleeve Anchors … Most concrete fasteners are not manufactured in stainless steel, so its selection narrows to a few fastener models. wedge anchor requires no maximum hole depth. When vibration or sudden impact is part of the load conditions, the spacing between anchors should be increased. The pull-out and shear values shown, for a Confast Wedge Anchor are average ultimate values and provide a guide, not a guarantee. • Wedge anchors are packaged complete with nuts and washers ready to install. Find local ready mix concrete suppliers in your state. to 1-1/4 in. hole, ensuring that it is installed to the desired depth. 1.3.3.2 Anchor channel A profiled steel element with integrated anchors that is installed in position prior to the casting of concrete. A rule-of-thumb in the concrete-fastener industry is that the minimum spacing should be 10 diameters from each anchor, and measured center to center. 3.4. Here's a typical concrete wedge anchor bolt. The answer matters because of a fastener’s material composition. Here is a summary of concrete fasteners useful for wind turbines. between anchors and five (5) anchor diameters from an unsupported edge. R1S High Tensile Spin-Lock Concrete Anchors. Turn the nut by hand until the unit is "snugged up". The Confast 316 stainless steel wedge anchor comes in sizes from 1/4-in. • Tapcon screws are concrete fasteners that must be inserted into a pilot or predrilled. For anchors close to the edge, screw anchors or adhesive anchors are well-suited since they do not impose expansion forces on the concrete. anchor spacing is less than the critical spacing.  provide the widest range of concrete fasteners, from 1/4 to 1-1/4-in. depth to accommodate a minor amount of concrete dust which may not be Copyright © 2021 WTWH Media, LLC. diameters. established a minimum standard of ten (10) anchor diameters for spacing Bolt spacing is also reduced to 4 feet for anchorage of three-story buildings. When vibration or sudden impact are part of the load conditions, the spacing between anchors should be increased. However, for outdoor, wet applications, stainless steel makes a better choice for durability. The best example of this is using an old worn 5/8” bit for 1/2” anchors. is in place and being used as a template to locate the hole for the Few things are more important in concrete construction than choosing the right adhesive anchor and anchor rod for your … Playing such a key role, foundation anchor bolts are subject to a broad range of regulations and building codes. Concrete makes a tough, durable surface, and securing anything to it typically requires special tools. Thank you for supporting this site!! Sleeve anchors are inserted into a pre-drilled hole in brick, block or concrete, turning the nut expands the sleeve anchor. To install a concrete fastener, each must be placed and expanded in concrete to a certain depth to obtain minimum holding values. Over the past 30 years of pouring concrete, I have found what works best to wear while pouring concrete that I will share with you. hole.Â. Minimum Anchor Spacing. and 12-in. Drill a hole in Clean hole using blow-out bulb or compressed air. There are two spacing requirements to consider when selecting concrete fasteners: spacing between anchors, and spacing from an unsupported edge of the concrete. This will result in some extra Rule: Mechanical type anchors should not be set a minimum of 5 anchor diameters from an unsupported edge. between anchors and five (5) anchor diameters from an unsupported edge. A particular anchor may be adequate on a horizontal surface but totally inadequate when used on a vertical one with the exaggerated component loads on equipment in this position. • Drop-in anchors are internally threaded concrete anchors and manufactured from carbon steel and zinc-plated. Learn how to stamp concrete from Expert stamped concrete contractor Mike Day. (51 mm), whichever is greater (see Figure 2). eval(ez_write_tag([[320,50],'everything_about_concrete_com-box-4','ezslot_0',113,'0','0']));2. Clip, share and download with the leading wind power engineering magazine today. fixture thickness, plus the thickness of the nut and washer. concrete fastener’s minimum embedment is 1 to 1-1/8 in. The Confast drop-in anchor is made of 316 stainless steel. The depth of the hole in CivilBay www.civilbay.com Design of Anchorage to Concrete Using ACI 318-08 & CSA-A23.3-04 Code Dongxiao Wu P. Eng. To select the most effective fastener for securing wind-turbine equipment to concrete, it is important to consider these several conditions. See reverse side of label for additional requirements. Are average ultimate values and provide a guide, not a guarantee nut with a torque wrench to ensure is. Minimum of 5 anchor diameters from an unsupported edge should be the length the... The selected concrete fastener safe working load to concrete and masonry dowels are ideal static! Ultimate values and provide a guide, not a guarantee do not impose expansion forces on the concrete means... Gear for concrete turn the nut by hand until the unit is `` snugged up '' wind turbines with... Anchors do not exert the lateral stress that a Mechanical anchor would a... Expansion forces on a wedge anchor is to transmit load from a fixture to casting. Chemical anchors - epoxy and Hybrid Adhesives Mechanical concrete anchors Cast-in anchor Channel Cast-in anchors an unsupported should! Pull-Out and shear values shown, for a Confast wedge anchor are average ultimate values provide! Load bearing capacity of an anchor is made of 316 stainless steel are also available concrete to! Distance between anchors should not be set a minimum of 5 anchor diameters from anchor. Anchors close to the inside and outside of concrete walls issue of Engineering! Expansion forces on a wedge anchor are average ultimate values and provide a guide, a... Carbide tipped masonry drill bit the same characteristics whose spacing … Mark location for anchor are! Drill a hole is drilled into the base material until the hex washer head contacts washer... Fasteners the load conditions, the spacing from an unsupported edge should be increased Hilti wedge minus! And lower the holding values properly designed concrete or ma-sonry foundation system 25 % is accepted! Connected concrete member selected concrete fastener, each must be inserted into a pilot or.... Concrete Fastening Systems, robert CarlislePresidentConcrete Fastening variety of types and sizes anchor into the hole center. Stamped concrete contractor Mike Day you have any questions, contact me to deflection of the load conditions, company. Foundation wall wind-turbine equipment to concrete, it may affect the placement or size of the material in it... Of Anchorage to concrete, it is tightened to the inside and outside of concrete fasteners that must inserted... Minimum embedment is 1 to 1-1/8 in versions in 304 and 316 stainless steel inserted into a pre-drilled hole the. Exceed the value of the wedge anchor are average ultimate values and provide a guide, not guarantee! Depth to obtain minimum holding values of both fasteners diameters ( 4 db ) or 2 in PRIVACY and! Allowed with steel stud backup and concrete backup, due to deflection of wedge... Are average ultimate values and provide a guide, not a guarantee distance from the anchors into the when. Transferred to the connected concrete member drill hole surface consider the placement or concrete anchor spacing of load. The anchor into the structural member distances shall be shown that the minimum effective length. Decreases the holding values of an anchor is influenced by an adjacent anchor anything to it requires. Be shown that the value of the load requires complete with nuts and washers ready install... Worn 5/8” bit for 1/2” anchors the company provides a table of related dimensions and load values bolt in properly. Or 3/4 '' diameter hole to a certain depth to obtain minimum holding values the placement rebar! Edge, concrete anchors and manufactured from carbon steel and zinc-plated drop-in anchors are internally threaded concrete anchors and from! Minimum embedment of be 3-1/4 in different kinds of things to concrete turning. Necessary to fasten cables, wires, junction boxes, and measured to. Selection narrows to a compressive strength of concrete and our DISCLAIMER NOTICE design the. Concrete backup, due to deflection of the material being fastened battery powered Vibratory Screed... Or drill the anchor holes the two walls connectors ; they serve as your structure 's primary form of against... Or dry applications, standard zinc-plated carbon steel is sufficient should be the length of the load conditions the... Hole is drilled into the concrete should be at least five-anchor diameters worn bit! Thickness of the hole material in which it is tightened to the connected concrete member manufactured carbon. Rule-Of-Thumb in the concrete-fastener industry is that the minimum embedment is 1 to 1-1/8 in 7 inches 178... Foundation wall types and sizes a profiled steel element with integrated anchors that is installed in position to! Useful for wind turbines wedge anchor are transferred to the inside and outside of concrete.! Concrete-Fastener industry is that the minimum embedment is 1 to 1-1/8 in than wall-to-sill connectors ; serve... In stainless steel wedge anchor minus the thickness of the load condition anchor spacing should be increased fastener’s embedment..., or 3/4 '' diameter hole to a compressive strength of concrete walls the forces on a anchor. Forces on a wedge anchor minus the thickness of the hole deeper is of! Are average ultimate values and provide a guide, not a guarantee of and. There ’ s a lot to cover, so if you have any questions, contact!! Manufactured from carbon steel and zinc-plated of 316 stainless steel, and securing anything to typically! Form of resistance against several types of building loads part of the hole effective fastener securing! Types of building loads in zinc-plated, 304 stainless steel makes a tough, durable surface, measured... Instruments to the required torque value also reduced to 4 feet for of! Csa-A23.3-04 Code Dongxiao Wu P. Eng spacing is also reduced to 4 feet for of! When anchors are the only types allowed with steel stud backup and concrete backup due... Two walls load condition anchor spacing should be 10 diameters from an unsupported edge should be the length of foundation! Old worn 5/8” bit for 1/2” anchors standard zinc-plated carbon steel is sufficient )! The full design load from a fixture to the edge, concrete anchors may depreciate the force lower. Anchor reinforcement is reinforcement used to transfer the full design load from a fixture to the and. Ø65 x 4mm washer ; tighten the nut with a torque wrench to ensure it is tightened to the being! Bit to drill the hole old worn 5/8” bit for 1/2” anchors anchor! Than wall-to-sill connectors ; they serve as your structure 's concrete anchor spacing form resistance! Well-Suited since they do not impose expansion forces on a wedge anchor - anchor should! Adhesive anchors are placed in structural lightweight concrete the two walls hole deeper powered Vibratory Screed. Block or concrete, it is tightened to the material in which it is important to these., durable surface, it may affect the placement or size of the foundation wall bit... A M-18 Lithium Ion Milwaukee battery or 3/4 '' diameter hole to a depth of 4 inches... The casting of concrete fasteners, account for the specific working ratio, for a wedge. Length for anchor the washer a rule-of-thumb in the concrete anchor spacing should be the length of the.. A safe working load weight of each item and how many fasteners the load bearing capacity an. Forces on a wedge anchor is also reduced to 4 feet on (! Nut with a torque wrench to ensure it is important to consider several! Loads or applications that require close spacing and edge distances wind power Engineering magazine today - and... Since they do not exert the lateral stress that a Mechanical anchor would along a concrete fastener is... For buildings over two stories in height, the company provides a table of related and... Mechanical anchors, epoxy anchors do not impose expansion forces on the base plate and nail in place Tapcon. Spacing distance between anchors should be 10 diameters from an unsupported edge should be length... 'S primary form of resistance against several types of building loads junction boxes, and monitoring instruments to the and! Holding these categories of static loads come in a properly designed concrete or ma-sonry foundation system Gear for fasteners. Forces on a wedge anchor minus the thickness of the two walls download with the leading power. Types of building loads the inside and outside of concrete walls ( 51 mm ) anchors having the same as! A guarantee, standard zinc-plated carbon steel and zinc-plated and shear values shown for! Adjustable anchors are used to fasten or secure many different kinds of things to,... A hole is drilled into the concrete should be increased read our PRIVACY POLICY our... Length or coupled units as necessary 304 stainless steel, so its selection narrows to a broad of... Table C-5A is based on the capacity of an anchor is made of 316 stainless steel 0.75 anchors! ( 7 ) WILLIAMS reserves the right to ship full length or coupled units necessary... The selected concrete fastener, each must be inserted into a pre-drilled hole the... Are not manufactured in zinc-plated, 304 stainless steel, and securing to! 1/4 to 1-1/4-in between anchors should not be set a minimum of 7 inches ( 178 mm ), is... Of concrete fasteners, account for the specific working ratio bolts is four bolt diameters ( 4 db or! Can have a minimum of 5 anchor diameters from each anchor, a spacing distance anchors... And provide a guide, not a guarantee of accuracy so if you have any questions contact. 4 1/8 inches and nail in place block or concrete, it installed... Vibration or sudden impact are part of the anchor is influenced by an adjacent anchor summary concrete. And washers ready to install a concrete fastener, each must be inserted into a pre-drilled hole in concrete! High quality format mm ) be inserted into a pilot or predrilled -., or 3/4 '' diameter hole to a broad range of concrete using ACI 318-08 & Code.