The Trubolt wedge anchor manufactured by ITW Red Head is used in uncracked, normal weight concrete in tension and shear loads.
The Trubolt wedge anchor is available in the following diameters: 1/4”, 3/8” and 1/2” and are fully threaded. They are composed of four parts: stud, expansion clip, nut, and washer. The anchor body or stud is cold-formed from carbon steel; the clip is manufactured from stainless steel. The Trubolt wedge anchor is an expansion anchor that is torque-controlled and zinc plated.The anchor body is threaded for most of its length. The end of the expansion clip attached is cone-shaped and reduced in diameter from the nominal diameter of the anchor body.
The Trubolt wedge anchors work by turning the nut clockwise, thus pulling the anchor body up and engaging the expansion clip against the wall of the concrete.
The Trubolt wedge anchor is designed for use in uncracked concrete, with requirements set for the concrete breakout strength, critical edge distance, pullout and shear strengths, minimum member thickness and minimum edge distance. All of the tables and mathematical equations for these requirements can be found in the report Table 2, 3 and Table 4 with the mathematical equations on page 1 and 2.
The trubolt wedge anchor must be installed in accordance with the manufacturer’s installation and the ESR-2251 report.
Special Instructions- in accordance with Section 1704.13 of the IBC, special inspection is required with this anchor. The inspector must be on the job site when the trubolt wedge anchors are being installed to verify the correct diameter, length, type and strength of concrete, hole dimensions, slab thickness and torque values and spacing requirements are being met.
The anchor is identified by the diameter and length, and by the length identification letter stamped on the end of the anchor body. The length identification letter table can be found on page 3, Table 1.
As with any anchoring project, it is important to keep safety in mind and follow instructions carefully. Always remember to wear safety goggles, handle all tools with extra care and follow all technical specifications. This article is meant to serve only as a basic explanation of concrete fasteners. Always refer to manufacturer's instructions or consult a contracting expert during any anchoring project.