Page 9 of Concrete Fasteners Catalog by Concrete Fastening Systems

7 p 888.498.5747 f 216.391.5352 www.confast.com SINGLE EXPANSION ANCHOR The Single expansion anchor consists of a nut, a cone and a tubular shield preassembled as a single unit. The two piece tubular shield is bound together with one spring band. It contains a wedge shaped nut at one end. Integral lugs on the nut and cone keep the wedges from turning in the tubular shield during expansion. The anchor are of precision die-cast zinc alloy commonly known as Zamak 5. the expansion action at one end of the anchor distributes the anchored load throughout the length of the anchor. This expansion anchor is recommended for shear loads or where the bolt is subjected to side pressure or vibration. Once fastened, the object may be unbolted, removed, and/or refastened. TECHNICAL INFO Approvals: Meets Zamak 5 Zinc Alloy: A.S.T.M. Specification 24 (AC41A) and S.A.E. 925. Applications: Medium duty in concrete, block and brick. Installation: (1) Drill hole of recommended diameter, see chart below, into the base material to a depth equal to, or slightly deeper than the length of the expansion shield. Clean out the hole of all dust and cuttings. (2) Place the Single Expansion anchor, nut end first, into the hole. The top end of the anchor should be flush or slightly below the base material surface. (3) Place the object to be fastened over the anchor in the base material and bolt into place. The bolt should engage 2/3 of the threads of the anchor. Anchor Spacing: The forces on a Single expansion anchor are transferred to the material that it is installed in. 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 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 condition anchor spacing should be increased. Bolt Length: Thickness of material to be fastened plus length of anchor equals bolt length. ANCHOR SIZE ANCHOR LENGTH HOLE SIZE BOLT DIA. PULL-OUT 6000 PSI CONCRETE Values shown are average ultimate values and are offered only as a guide and are not guaranteed. A safety factor of 4:1 or 25% is generally accepted as a safe working load. Reference should be made to applicable codes for the specific working ratio. Minimum embedment for satisfactory anchor performance is 4-1/2 bolt diameters. Deeper embedments will yield higher tension and shear capacity. TECHNICAL DATA 1/4" 1-5/16" 1/2" 1/4" 800 lb. 3/8" 2" 3/4" 3/8" 1450 lb. 5/8" 3-5/8" 1" 5/8" 2400 lb. 5/16" 2" 3/4" 5/16" 1100 lb. 1/2" 2-1/2" 7/8" 1/2" 1850 lb. 3/4" 2-3/4" 1-1/4" 3/4" 3000 lb.

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