Hot-dipped galvanized (wedge) anchor bolts are designed for use in solid concrete. They should never be installed into soft, hollow base materials. The hot-dipped galvanized coating is excellent for use in moist atmospheres where more rust resistance is required than the standard zinc plated wedge anchors can provide. The hot-dipped galvanized wedge anchor bolts have more rust resistance than the mechanically galvanized wedge anchor bolts, but not more than stainless steel.
The hot-dipped galvanized wedge anchor bolts come in diameters ranging from 3/8" to 1-1/4." Each diameter of hot-dipped galvanized wedge anchors bolts come packaged with the correct size and number of nuts and washers that are hot-dipped galvanized and will match-up with the threads on the anchor. Standard nuts and washer will not work with a hot-dipped galvanized wedge anchor bolt because the threads are manufactured differently to allow for the thick galvanized material.
Each diameter of hot-dipped galvanized wedge anchor bolt comes in a number of different lengths to allow for a wide range of material thickness that might need to be fastened. The 3/8" diameter comes in a shorter length of 2-1/4" while the longest length of 12" is available in diameters of 1/2", 5/8", 3/4", 7/8", 1" and 1-1/4".
The holding values of a hot-dipped galvanized wedge anchor bolts depend on the diameter of wedge anchor bolt being installed, the depth of embedment and the hardness of the concrete base material.
A hole must be drilled into the concrete for the hot-dipped galvanized wedge anchor bolt to be installed. The diameter of the hole is equal to the diameter of the hot-dipped galvanized wedge anchor bolt being installed. A 5/8" hot-dipped galvanized wedge anchor bolt requires a 5/8" drilled hole.
The hole should be drilled deeper into the concrete than the embedment depth of the hot-dipped galvanized wedge anchor bolt. A minimum of 1/2" deeper is required to ensure that the wedge anchor bolt will not bottom out in the hole and to allow space for any debris to fall that is created during the installation process.
The hole that is drilled into the concrete for the hot-dipped galvanized wedge anchor bolt must be drilled using a hammer drill in the hammer mode and using a carbide tipped bit that meets ANSI standards. It is critically important that the drill bit meet ANSI standards because this will ensure proper tolerance between anchor diameter and hole diameter.
Using a hammer drill in the hammer mode, drill a hole in the concrete using a drill bit that has a carbide tip, meets ANSI standards and is equal in diameter to the diameter of the hot-dipped galvanized wedge anchor bolt being installed.
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.