Sleeve anchorsВ come in the widest variety of sizes for applications that fall into this category.ДЄnchors with diameters ranging from 1/4' to 5/16' are sufficient for most light duty applications while the 3/8' and 1/2' diameters are adequate for most medium duty situations. Removing these fasteners will greatly damage the concrete block and possibly the fixture as well. However, hammer-type anchors are permanent installations. If using a stud-type anchor, female type anchor, or the concrete screw, then the item being fastened can be removed at any time with little or no damage to the concrete block. Hammer-type Anchor: the stud does not protrude from the wall, creating a finished look, i.e.Concrete Screw: screwed directly into the block for a finished look.Female-type Anchor: a screw is inserted into the anchor for a finished look, i.e., machine screw anchor, lag shield anchor, single expansion anchor.Stud-type Anchor: the stud will stick out from the wall, i.e.There are four options for use in concrete block: Is the load going to be placed where a shock load could occur?ДЇinally, itвЂ™s time to determine the appropriate type of fastener for the application.How heavy is the item being fastened to the block wall?.The next step in the process is to ascertain the type of load that is going to be anchored: The fastener must not penetrate the wall into the cavity.When inserting an anchor into this area, whether it's a fastener that exerts pressure or a concrete screw that taps threads into the base material, the holding values will be diminished or become non-existent.This leads to a cone-shaped space, with the point of the cone closest to the surface of the block. Drilling into the block with a hammer drill will cause the block will spall.When fastening into the hollow section of a block, there are a few important considerations to keep in mind: The hollow section of the block is the least desirable section in which to fasten, but this is sometimes unavoidable. The blockвЂ™s solid sections usually offer the best quality fastening this will depend on the distance of the fastener to the unsupported edge of the cavity and the quality of the material from which the block is made. An anchor exerting this pressure against an unsupported edge decreases the anchorвЂ™s holding values.ДЇastening into the mortar joint can be an excellent option depending on the quality and quantity of mortar used to set the block in place. Tip:В All anchors - except for concrete screws - exert an outward force. Some applications may allow each fastener to be placed in the same part of the block, while other installations require that each anchor be placed in different sections of the block. The decision of anchor placement in the block depends if the fastener will be placed in the: Sign up here to get the dayвЂ™s top stories delivered straight to your inbox.ДЇor applications that require fastening to concrete blocks, it is important to gather information in advance this will help inform decisions about where to drill into the block and the best anchor choice for the specific application.

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Hilti anchors in cmu block