Arguably one of the smallest parts of a construction project, anchors and fasteners are also one of the most critical elements that can gain international media attention if they fail. Manufacturers go to painstaking efforts to develop reliable, flexible, and cost-effective products and services to help engineers, owners, and contractors select the most appropriate anchor or bolt for the job. Products are available in a number of materials including chemical, metal, plastic, undercut, cast-in, and screw anchors. Many are designed for a wide variety of light-, medium- and heavy-duty applications.
In a response to an open invitation from Structural Engineer, a number of companies provided the following information about their products. Company web addresses are provided for immediate access to additional information. To participate in Structural Engineer Specifiers’ Guides, visit www.gostructural.com/specguide
The OCM Masonry Anchor is Dayton Superior Corporation’s (www.daytonsuperior.com) post installed rebar anchoring system, consisting of a mechanical expansion anchor preassembled to a length of #4, #5, or #6 Grade 60 rebar. The system is used as a foundation anchorage or as a vertical tie for affixing reinforcing steel in masonry wall construction to a poured-in-place concrete foundation or floor slab. Since there is an electro-zinc plated, colorless chromate coating on the expander sleeve and cone, the OCM Masonry anchor prevents installation delays due to weather. It installs into a drilled hole with a single sledgehammer blow.
Manta Ray earth anchors by Foresight Products, LLC (www.earthanchor.com) provide proof tested results and easy installation with no excavation or soil disturbance.
The FX-830 Anchor Set by Fox Industries (www.foxind.com) is a pourable three component, shrinkage compensated, high strength polyester anchor grout. It has been successfully used for more than 20 years for a variety of projects including direct fixation of anchors in the transit industry, crane rail grouting, temporary barrier anchors for bridge repair, and other general anchor bolt grouting. The FX-830 is also available in a cold weather version for use in temperatures below 50°F.
Hayward Baker Inc. (www.HaywardBaker.com), a member of the worldwide Keller Group, provides ground and rock anchors for temporary or permanent support of excavations for permanent resistance of hydrostatic uplift forces on bottom slabs and for resistance to wind-induced uplift forces. Hayward Baker also provides a full range of geotechnical construction services.
Hilti (www.us.hilti.com), a fastening company for over 50 years, has been in the post-installed anchor business since 1971. The company is a leading force in the anchor market in terms of research and development. It introduced many industry firsts, such as the first anchor for use in cracked concrete in 1977 and the first injectible cartridge adhesive anchor system in 1982. In addition, Hilti developed the first mechanical and adhesive anchors to comply with the latest American. model building codes. Hilti’s complete portfolio of anchors includes chemical, metal, plastic, undercut, cast-in, and screw anchors designed for a wide variety of light-, medium- and heavy-duty applications.
With Kelken Construction Systems’ (www.kelken.com) removable structural anchors, you can install the anchor, put it into service, and then, at anytime, you can remove it and use the anchor again. This works especially well for ever-changing equipment locations and work zone protection. Kelken manufactures high strength adhesive anchoring resins and all types of steel anchors.
MKT Fastening, LLC’s (www.mktfastening.com) Sup-R-Stud TZ wedge anchor is designed for fastening into cracked or un-cracked concrete. Available in 1/2-inch and 5/8-inch diameters and four different lengths up to 10 inches long, the SRS TZ is a category one-rated anchor that is listed by ICC under ESR-2461. It is also available in metric sizes and in stainless steel via special order.
Powers Fasteners, Inc. (www.powers.com) is an innovating developer and supplier of anchoring and fastening systems for concrete and masonry construction. Powers offers several building code compliant products, including qualified seismic anchors for cracked and un-cracked concrete with top category ratings. Anchor design is supported by Powers Design Assist (PDA) real-time interactive software, which can help individuals design and select anchors quickly in a simple visual environment. Project results in accordance with ACI 318, Appendix D with code references can be easily printed and saved.
Simpson Strong-Tie Anchor Systems (www.simpsonanchors.com) SET-XP anchoring adhesive by Simpson Strong-Tie Anchor Systems is code-listed for use in cracked and un-cracked concrete (see ICC-ES evaluation report ESR-2508). It’s formulated and tested to meet the strict ICC-ES AC308 cracked concrete requirements. The epoxy can be used with threaded rod (carbon and stainless steel) and rebar. Anchor Designer Software that helps simplify design requirements under the new code is available for free as a download from the website.
Williams Form Engineering Corp. (www.williamsform.com) has added strand anchor systems to an already fine line of ground engineering products. Williams has made a commitment to the ground engineering industry to supply well-engineered, quality products, and it backs those products with technical support and timely material delivery. The same commitment has been made with the Williams strand anchor line. Williams strand anchors utilize a high-density extruded polyethylene sheath over a corrosion-inhibiting compound in the un-bonded zone. Williams has what it claims to be most technologically advanced extrusion equipment for the manufacture of permanent and temporary anchors. The state of the art equipment allows for precise extruded lengths in the un-bonded zone as well as high quality manufacturing.