It is essential to consider a number of different questions before getting started on the different types of concrete anchors available for this type of application. These questions include, but are not limited to:
Only once these questions have been answered will the selection of the right fastener for your specific application begin.
While there are three different types of base material that a sign can be attached to, there are issues associated with each one. If the base material is concrete, make sure that the fasteners being used are not too close together. Generally, installed about 10x the diameter apart from each other. It is also important to make sure that the anchors are not within a distance equal to about 5x their diameter from any unsupported edge. When attaching a sign to brick or block, the fastener can be placed either in the mortar joint or in the brick/block itself. In the mortar joint, the holding values attained will be determined by the quantity as well as the quality of the mortar. If the concrete fasteners are placed in the brick or block itself, then the holding values will be determined by the quality of the base material and whether the anchor is in the hollow or solid section.
Wedge anchors should only be used in solid concrete. They should never be used in brick or block. These anchors come in a variety of diameters from 1/4" to 1-1/4" and lengths ranging from 1-3/4" to 12". Wedge anchors are available in zinc plated, hot-dipped galvanized and stainless steel. The wedge anchor comes complete with nut and washer and has excellent holding values in concrete.
The wedge anchor installation process is simple and requires 5 steps:
** See all diameters, lengths, and prices for wedge anchors.
Sleeve anchors are versatile fasteners that can be used in concrete, brick, and block. These anchors come in diameters ranging from 1/4"-3/4" and lengths from 5/8" to 6-1/4". Many diameters are available in zinc plated and stainless steel. A variety of head styles is also available for many of the sleeve anchors including flat countersunk, round head and hex nut. The hex nut has the most choices in terms of length and diameter. The flat countersunk and round head is only available in the 1/4" and 3/8" diameter only. These anchors come complete with nut and washer and their length is measured from underneath the nut and washer.
The sleeve anchor installation process is relatively simple:
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Tapcons are versatile fasteners that can be used in concrete, brick or block. They are available in blue Climaseal® and 410 stainless steel. Standard blue Tapcons come in two different diameters: 3/16" and 1/4". The larger diameter Tapcon® is available in 3/8", 1/2", 5/8" and 3/4". These large diameter screws are only available in hex washer head. The length of screw needed will be determined by the thickness of the sign. The standard blue screws require a minimum embedment of 1" and a maximum embedment of 1-1/4".
Using Tapcons are fairly simple:
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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.