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Hot Dipped Galvanized Wedge Anchors

Sunday, February 13, 2011
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Hot dipped galvanized wedge anchors are a type of wedge anchor; the other wedge anchors are zinc plated carbon steel and stainless steel.  The hot-dipped galvanized wedge anchor is designed for use in solid concrete in outdoor applications where moisture is present. It is important to under the technical information about hot-dipped galvanized wedge anchors and wedge anchor prices.

Hot-Dip Galvanizing

Hot-dipped galvanized wedge anchors are galvanized through a process through which the anchor stud, as well as the nuts and washers, are immersed in a tub of molten zinc. This causes the zinc to be metallurgically bonded to the steel, which coats the wedge anchor to protect the steel from corrosion. 

  • The term “hot-dipped galvanizing” is often referred to as “galvanizing”, but this term is often used incorrectly to describe steel that is coated with a zinc paint, elector-statically zinc plated or has zinc applied mechanically. All of these methods of applying zinc to steel for protection against corrosion are very different, and may not be appropriate for specific application requirements. 
  • Many manufacturers sell mechanically galvanized wedge anchors.  Concrete Fasteners, Inc. sells wedge anchors that are always hot-dipped galvanized.
  • More information about the hot dip galvanizing process from the American Galvanizes Association.

Packaging
Hot dipped galvanized wedge anchors are packaged with the correct number and size of nuts and washers for the number of wedge anchor studs in the box.  The number of hot-dipped galvanized wedge anchors in a box depends on the diameter and length of the specific wedge anchor.

Diameters Available
There are nine hot-dipped galvanized wedge anchors manufactured. While all nine are not always available from every manufacturer, Concrete Fasteners, Inc. does stock all diameters and will ship them the same day that the order is received.  The smallest diameter of hot-dipped galvanized wedge anchor is 3/8” and the larger diameters are 1/2”, 5/8”, 3/4”, 7/8”, 1” and 1-1/4”.

Lengths Available
Each diameter of hot-dipped galvanized wedge anchor comes in several different lengths. The shortest length is 2-1/4” in the 3/8” diameter. Other lengths are sold up to 12” long in diameters of 1/2”, 5/8”, 3/4”, 7/8”, 1” and 1-1/4”.  It is possible to special order longer lengths from Concrete Fasteners, Inc. by calling 216-357-7433 for a quote.

Holding Strength
The holding strength of a hot-dipped galvanized wedge anchor is created by various factors that include diameter, depth of embedment, the strength of concrete and torque value.

  • Diameter of hot-dipped galvanized wedge anchor – the larger the diameter of hot-dipped galvanized wedge anchor used in a particular application then the better the pull-out strength and shear strength will be achieved.
  • Each diameter of hot-dipped galvanized wedge anchor must be installed into the concrete a minimum distance.  This minimum embedment depth will allow for the minimum holding values and deeper embedment will create the opportunity for better holding values.
  • The strength of concrete is measured in PSI. The higher the PSI of the concrete then the higher the holding values will be for the hot-dipped galvanized wedge anchor.
  • Each diameter of hot-dipped galvanized wedge anchor has a torque value that the nut on the hot-dipped galvanized wedge anchor must be torqued in order to ensure correct holding values.

Diameter

Minimum Embedment

Torque Value (FT/lbs.)

3/8”

1-1/2”

25-30

1/2”

2-1/4”

50-60

5/8”

2-3/4”

75-90

3/4”

3-1/4”

150-175

7/8”

3-7/8”

200-250

1”

4-1/2”

250-300

1-1/4”

5-1/2”

400-450

Hole Depth

The depth of the hole that is drilled into the concrete for the hot-dipped galvanized wedge anchor to be inserted is a critical depth.  The depth must be a minimum of 1/2” deeper than what the hot-dipped galvanized wedge anchor will penetrate. The penetration of the hot-dipped galvanized wedge anchor must meet minimum embedment requirements.  This will prevent the hot-dipped galvanized wedge anchor from bottoming out in the hole, and the space can be used for dust or debris that is created during the installation process.

  1. Drill a hole in the concrete using a hammer drill in the hammer mode, using a carbide tipped drill bit that meets ANSI standard B212.15 and is  the same diameter as the hot-dipped galvanized wedge anchor being installed.
  2. Drill the depth of the hole a minimum of 1/2” deeper than the minimum depth of embedment for the diameter of hot-dipped galvanized wedge anchor.
  3. Using a wire brush, compressed air or vacuum, clean the hole of debris and dust.
  4. Thread nut onto threaded end of hot-dipped galvanized wedge anchor so that the top of the nut is flush with the top of the hot-dipped galvanized wedge anchor. This will protect the threads from damage during installation.
  5. Insert hot-dipped galvanized wedge anchor, clipped end first, into the predrilled hole in the concrete.  If the wedge anchor is being installed through a hole in a fixture, make sure that the hole diameter is larger than the diameter of the hot-dipped galvanized wedge anchor being used.
  6. With a hammer, strike the nutted end of the hot-dipped galvanized wedge anchor until a minimum of 6 threads are below the surface of the concrete or below the surface of the item being attached.
  7. Using your fingers, tighten the nut.
  8. Take a wrench and turn the nut clockwise 2 to 3 turns or until the proper torque values for the diameter of hot-dipped galvanized wedge anchor is obtained.

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Always use personal protective equipmentAs 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.

Article Written By:
Mike Pistorino, Vice-President Operations

 

 

 

 


Concrete Fasteners, Inc. has over 40 years of experience selling concrete fasteners. We can ship out one box or a whole pallet of concrete anchors. Our products are of the highest quality... "your satisfaction is guaranteed". We ship all orders the same day the order is received.

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