Purchase Sleeve Anchors. Before installing concrete sleeve anchors it is important to consider a number of technical specifications. First, consider the four head styles: acorn, hex, flat and round.
Ultimate holding values, anchor length, and minimum embedment will determine the size and type of sleeve anchor needed for a specific application. The sleeve anchor can be installed in solid concrete, brick or block base material. The hole to be drilled in the base material is equal to the diameter of the sleeve anchor being used. Length: To determine the length of sleeve anchor required, add the thickness of the material to be fastened, plus minimum embedment, plus the thickness of the nut and washer.
The sum of these three items equals the minimum sleeve anchor length. The Sleeve anchor requires no maximum hole depth. The depth of the hole in the base material should be at least the length of the sleeve anchor minus the thickness of the material being fastened.
This will provide some extra depth to accommodate a minor amount of concrete cuttings which may not be able to be cleaned out of the hole. Spacing: The forces on a Sleeve Anchor are transferred to the material in which it is installed.
If the anchors are installed too close together, it can cause an interaction of the forces, thus reducing the holding power of the anchor. 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.
When vibration or sudden impact is part of the load conditions, the spacing should be increased. Values shown are average ultimate values and are offered only as a guide and are not guaranteed. Reference should be made inapplicable codes for a specific working ratio. Recent Posts. Male or Female Anchor? Female anchors would require the spotting of the anchor and then place th …. Feb 21st Mike Pistorino.
Purchase Concrete Screws A self-tapping screw is a screw that taps its own threads when scr …. Jun 30th Mike Pistorino. Jun 28th Mike Pistorino. Home Technical Specifications for Sleeve Anchors Purchase Sleeve Anchors Before installing concrete sleeve anchors it is important to consider a number of technical specifications. Shear lbs. Box Qty.ASTM F is the newest construction fastener specification developed by the American Society for Testing and Materials and covers steel anchor bolts intended for anchoring structural supports to concrete foundations.
Chemical requirements, mechanical properties, and dimensional tolerances are all covered under the F specification. ASTM F consists of three grades that correspond to the minimum yield strength of the steel. These grades are as follows:. Learn more about common configurations of straight rodsbent anchor boltsand headed anchor bolts that are the three different bolt designs this specification covers.
The end of each anchor bolt intended to project from the concrete requires a color code to identify the grade as follows:. However, only color coding is required.
When one or both of the supplementary requirements are specified, the end of the anchor bolt intended to project from the concrete shall be steel die stamped. Grade identification markings are as follows:.
Body Diameter: Both full bodied cut thread anchor bolts or reduced bodied roll thread anchor bolts are acceptable, and either can be supplied at the discretion of the manufacturer unless otherwise specified.
DESIGN OF ANCHOR BOLTS EMBEDDED IN CONCRETE MASONRY
Grades ASTM F consists of three grades that correspond to the minimum yield strength of the steel. These grades are as follows: F grade 36 — 36 ksi mininum yield strength. F grade 55 — 55 ksi mininum yield strength.
The Strong-Bolt 2 is available in carbon steel, Type and Type stainless steel. Select One of Our Sites.
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Product Details A wedge-type expansion anchor designed for optimal performance in cracked and uncracked concrete as well as uncracked masonry. Installation Drill a hole in the base material using a carbide drill bit the same diameter as the nominal diameter of the anchor to be installed. Drill the hole to the specified minimum hole depth, and blow it clean using compressed air.
Overhead installations need not be blown clean. Alternatively, drill the hole deep enough to accommodate embedment depth and dust from drilling. Assemble the anchor with nut and washer so the top of the nut is flush with the top of the anchor. Place the anchor in the fixture, and drive it into the hole until the washer and nut are tight against the fixture. Tighten to the required installation torque.
Strong-Bolt 2 Diameter in. Drill Bit Size in. Fixture Hole in. Wrench Size in. Concrete Installation Torque ft. Carbon Steel Concrete Installation Torque ft. Caution Do not use an impact wrench to set or tighten the Strong-Bolt 2 anchor Oversized holes in the base material will make it difficult to set the anchor and will reduce the anchor's load capacity. A comprehensive product and information catalog for Anchoring, Fastening and Restoration Systems products for concrete and masonry.
A catalog featuring connectors and fasteners for mass timber construction solutions.
Products for Tilt-Wall Construction. A product flier featuring products available for use in tilt-wall or "tilt-up" construction. Seismic Retrofit Guide for Raised Foundations. A seismic retrofit guide for homes with raised foundations. This guide helps homeowners understand how to inspect, evaluate and perform basic retrofit construction using Simpson Strong-Tie products. Canadian Addendum for Anchor Catalogue. Safety Data Sheet for Mechanical Anchors. Intended to provide information for use in workplace chemical management; information such as physical properties; hazards; protective measures; precautions for handling, storing, and transportation.
Carbon Steel Model No. Type Stainless Steel Model No. Drill Bit Dia.Log In. Zinc is the most compatible coating for steel bolts that is also relatively cost effective. Aluminum embedded in and in direct contact with concrete is not acceptable. A chemical reaction occurs and the concrete literally self destructs from the expansion product of the reaction, just like rust on carbon steel that is allowed to corrode in concrete.
I don't know about epoxy grouted aluminum in concrete but I've seen slabs with aluminum cast into it break themselves apart. I have noticed in the past with aluminum panels that the manufacturer of the panels has recommended stainless steel screws with some kind of special washer between the steel and the aluminum. Does that line of thinking work also in this case, say with using stainless steel anchor bolts or epoxy bolts with an aluminum base plate?
When this issue first came up, the only thing that I thought of was stainless. Then came the comments about the specs calling for hot-dipped galvanized. I've always assumed that stainless was preferred, if not required. Is that assumption correct? MLM Also, thanks for the input. I think it's more of a cost factor when considering Stainless verses galvanized steel. Stainless fasteners should be Cadmium or Zinc plated before being inserted in aluminum bodies.
Usual anodizing or conversion coating are not protective enough at the contact place. Althought they are far apart on the galvanic scale, the typically much larger area of the aluminum part compared to the fastener reduces to nearly nil the tendency of the aluminum to corrode. However, in this case, I'd definitly use galvanized anchors - they were specified, are compatible, are probably more available not to mention less costly. Note that the environment is a critical issue - If this is on the seashore, or exposed to wet atmosphere, or under water, or vibrating from machinery, etc then corrosion needs to be re-evaluated.
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Anchor Bolt Specifications
Students Click Here. Related Projects. The contractor used your everyday common steel threaded anchor rods.There are numerous technical specifications that must be considered when using Single Expansion Anchors. Considerations include: single expansion anchor diameter, bolt diameter, and required hole size. The Single Expansion Anchor is a great fastener when working with soft masonry or base materials of questionable strength.
Once all of these factors have been determined, you can find the expected holding values in the technical information below. Length: To determine the length of machine bolt required, add the thickness of the material to be fastened plus the length of the single expansion anchor. Spacing: The forces on a Single Expansion Anchor are transferred to the material in which it is installed.
If the anchors are installed too close together, it can cause an interaction of the forces, thus reducing the holding power. 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. When vibration or sudden impact are part of the load conditions, the spacing should be increased.
Values shown are average ultimate values and are offered only as a guide and are not guaranteed. Reference should be made to applicable codes for the specific working. Torque Drill Bit Pull-Out lbs.ASTM's fastener standards are instrumental in specifying, testing, and evaluating the material, dimensional, mechanical, and metallurgical properties of the various forms of hardware fasteners.
These fasteners are used to mechanically join or affix other hardware objects together, and come in many forms which include rivets, nuts, bolts, studs, screws, washers, eyebolts, nails, and threaded fasteners.
These fastener standards allow hardware product manufacturers, as well as the end-users of such products, to examine and assess fasteners to ensure their strength and quality towards safe utilization.
Additive Manufacturing Standards. Cement Standards and Concrete Standards. Fire Standards and Flammability Standards. Geotechnical Engineering Standards.
Consumer Product Evaluation Standards. Corrosion Standards and Wear Standards. Durability of Nonmetallic Material Standards. Electrical Insulating Material Standards. Electrical Standards and Magnetic Conductor Standards.
Environmental Toxicology Standards. Fatigue Standards and Fracture Standards. Industrial Hygiene Standards and Safety Standards. Medical Device Standards and Implant Standards.
Oxygen Enriched Atmospheres Standards. Paint Standards and Related Coating Standards. Paper Standards and Packaging Standards. Pharmaceutical Application Standards. Resilient Floor Covering Standards.
Rolling Element Bearing Standards. Search and Rescue Operations Standards. Sports Standards and Recreation Standards. Temperature Measurement Standards.The function of anchor bolts is to transfer loads to the masonry from attachments such as ledgers, sills, and bearing plates. Both shear and tension are transferred through anchor bolts to resist design forces such as uplift due to wind at the top of a column or wall or vertical gravity loads on ledgers supporting joists or trusses see Figure 1.
The magnitude of these loads varies significantly with the application. This TEK summarizes the requirements to properly design, detail and install anchor bolts embedded in concrete masonry construction based on the provisions of the edition of Building Code Requirements for Masonry Structures ref. Anchor bolts can generally be divided into two categories: embedded anchor bolts, which are placed in the grout during the masonry construction; and post-installed anchors, which are placed after the masonry is constructed.
Post-installed anchors achieve shear and tension pull out resistance by means of expansion against the masonry or sleeves or by bonding with epoxy or other adhesives. Anchor bolt configurations covered by Building Code Requirements for Masonry Structures fall into one of two categories:. For other anchor bolt configurations, including post-installed anchors, design loads are determined from testing a minimum of five specimens in accordance with Standard Test Methods for Strength of Anchors in Concrete and Masonry Elements, ASTM E ref.
Building Code Requirements for Masonry Structures ref. Note that Chapter 5 of the code also includes prescriptive criteria for floor and roof anchorage that are applicable to empirically designed masonry, but these provisions are not covered here.
While many of the requirements for anchor design vary between the allowable stress and strength design methods, some provisions are commonly shared between the two design approaches. The following discussion and topics apply to anchors designed by either the allowable stress or strength design methods.
For both design methods, the anchor bolt net area used to determine the design values presented in this TEK are taken equal to the following, which account for the reduction in area due to the presence of the anchor threading:.
The minimum effective embedment length for anchor bolts is four bolt diameters 4 d b or 2 in. For bent-bar anchors, the effective embedment length is measured parallel to the bolt axis from the masonry surface to the bearing surface on the bent end minus one anchor bolt diameter.
This requirement applies to anchor bolts embedded in the top of a masonry element as well as those penetrating through the face shells of masonry as illustrated in Figure 2.
While research ref. Although it rarely controls in typical masonry design, Building Code Requirements for Masonry Structures also requires that the distance between parallel anchors be at least equal to the diameter of the anchor, but not less than 1 in.
Existing masonry codes do not address tolerances for anchor bolt placement. In the absence of such criteria, construction tolerances used for placement of structural reinforcement could be modified for application to anchor bolts.
In order to keep the anchor bolts properly aligned during grout placement, templates can be used to hold the bolts within the necessary tolerances. Templates, which are typically made of wood or steel, also prevent grout leakage in cases where anchors protrude from the side of a wall. The projected tension breakout area, A ptand the projected shear breakout area, A pvfor headed and bent-bar anchors are determined by Equations 1 and 2 as follows:.
The anchor bolt edge distance, l beis measured in the direction of the applied load from the center of the anchor bolt to the edge of the masonry. Any portion of the projected area that falls within an open cell, open core, open head joint, or falls outside of the masonry element is deducted from the calculated value of A pt and A pv. A graphical representation of a tension breakout cone is shown in Figure 4.
The allowable axial tensile load, Ba, for headed and bent-bar anchor bolts is taken as the smaller of Equation 3, allowable axial tensile load governed by masonry breakout, and Equation 4, allowable axial tensile load governed by anchor yielding. For bent-bar anchors, the allowable axial tensile load must also be less than that determined by Equation 5 for anchor pullout.
The allowable shear load, B vfor headed and bent-bar anchor bolts is taken as the smallest of Equation 6, allowable shear load governed by masonry breakout, Equation 7, allowable shear load as governed by crushing of the masonry, Equation 8, allowable shear load as governed by masonry pryout, and Equation 9, allowable shear load as governed by anchor yielding. Anchor bolts subjected to combined axial tension and shear must also satisfy the following unity equation:.
The relationship between applied tension and shear loads versus allowable tension and shear loads is illustrated in Figure 5. The design provisions for anchor bolts using the strength design method is nearly identical to that used for allowable stress design, with appropriate revisions to convert the requirements to produce nominal axial tension and shear design strengths.
The nominal axial tensile strength, B anfor headed and bent-bar anchor bolts is taken as the smaller of Equation 11, nominal axial tensile strength governed by masonry breakout, and Equation 12, nominal axial tensile strength governed by anchor yielding. For bent-bar anchors, the nominal axial tensile strength must also be less than that determined by Equation 13 for anchor pullout. The nominal shear strength, Bvn, for headed and bent-bar anchor bolts is taken as the smallest of Equation 14, nominal shear strength governed by masonry breakout, Equation 15, nominal shear strength as governed by crushing of the masonry, Equation 16, nominal shear strength as governed by masonry pryout, and Equation 17, nominal shear strength as governed by anchor yielding.
As with allowable stress design, anchor bolts subjected to combined axial tension and shear must also satisfy the following unity equation:. The bolts have an effective yield stress of 60 ksi With this, the total design shear force for the connection is 1, lb 7.