Similarly, joint locations in the top of masonry walls can be problematic and should be approached with caution if considered for anchorage. Consequently, these locations should generally not be used for anchoring unless the product manufacturer has specific data and installation instructions for these locations. Mortar joints of hollow CMU walls and most vertical joints of CMU walls are only required to be mortared the depth of the face shell. Anchoring locations in the mortar joint are also possible however, additional care should be taken depending on the masonry wall type. The screen tubes hold the adhesive in place before installation of the steel anchor element (i.e., threaded rod or rebar). In hollow base materials, anchors may be installed through the face of material into the cavity section provided the adhesive is suitable for use with screen tubes. Installation of adhesive anchors, common in solid block or brick, may be in the face, end, or top of the wall.
The combination of masonry components, including grout for solid filled Concrete Masonry Unit (CMU) members, is critical to the behavior of the composite member and ultimately has a significant influence on the anchorage strength.īonding rebars into grouted concrete masonry walls. Mortar strength, consistency, and conditions can vary significantly in existing structures, especially in older walls exposed to the elements. Masonry block and brick are found in a variety of sizes and shapes (depending upon the age and location of a building) and both hollow and solid styles. Site testing may be appropriate where the wall strength at planned anchorage locations is unknown. Installers and users should have a working knowledge of the material prior to any physical anchorage. Understanding the type, condition, and capability of masonry relative to the anchorage is significant. Special inspections and proof loading on siteĪdhesive anchors rely on the bond formed to the inside of a drilled hole and the transfer of loads locally into the masonry base material.Adhesive system, installation, and curing.Hole drilling and drilled hole cleaning.Anchor system selection and preparation.Masonry base material type and installation location.There are important aspects that can directly influence proper installation practice of adhesive anchor systems in masonry and minimize potential issues that may arise surrounding their use and service in the field. Injecting adhesive into drilled holes in masonry to make an anchor connection.
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