Power-actuated fasteners (PAFs), whether driven by powder, gas or electro-mechanical actuation, may generally be installed in hollow CMU, grout-filled CMU and brick. Because such connections generally require less load and require less installation effort than the anchorages described in the next section, installations of the connectors are typically to hollow masonry and within approximately 1/2 inch of the grouted portion of masonry. Typical applications for light-duty fasteners include metal and plastic sheets, insulation, electrical conduit and miscellaneous small fixtures. Common embedded fasteners to masonry materials. Common light-duty and heavier-duty embedded fasteners are shown in Figure 2.ДЇigure 2. Broadly speaking, fastening to the outsides of masonry elements may be put into two categories: (1) light-duty and (2) heavier-duty, as described in the subsequent two sections. Whether hollow or solid, as with CMU, the technical data for the fastener should again be associated with the brick type, compressive strength, and mortar.Дetermining the proper attachments to grout-filled CMU, hollow CMU and brick depends on application, magnitude of load, and installation circumstances. As with grout-filled CMU, it is important to ensure that published loads are associated with the specified masonry strength. When utilizing products that are installed through drilled holes in the face shell of hollow masonry, verify whether the installation instructions for the product being installed require rotation-only drilling, as hammer drilling tends to break out more of the back of the face shell, which the product may or may not be designed to accommodate.

Hollow CMU attachments include fastening directly into the face shell of non-grouted CMU.

Similarly, manufacturers often report data associated with Type N mortar to conservatively cover the range of mortar options in new construction. TMS 402-13/ACI 530-13/ASCE 5-13 В§9.1.9.1 specifies that design must be considered with 1,500 psi masonry therefore, many fastener manufacturers choose to develop product data for this minimum strength. One should ensure (via, e.g., ICC-ES Evaluation Service Reports) that the published loads for connectors are associated with the specified masonry design strength, fвЂ™m, being used. Thus, fastening to head joints should generally be avoided, even if the head joints are fully buttered. Note: CMU head joints are generally not a reliable substrate for anchoring due to non-uniform buttering between adjacent units and the stress discontinuities between the mortar and adjacent blocks. Possible installation locations include the face of the masonry wall (including bed joints, webs and the center of face shell), the top of the wall (directly into grout), and the sides of the wall.

Grout-filled CMU offers the highest load capacity of the three masonry types listed.

Three major categories to which components are fastened are explored in this article:

In addition to cast-in tie wires, veneers and other elements are connected with a variety of embedded fasteners, including power-actuated pins (nails), screws and anchors. This article describes various types of fasteners for masonry, notes specific installation and application considerations, and emphasizes the value of third-party evaluation reports issued by, e.g., ICC Evaluation Service LLC (ICC-ES). Where reliable performance is desired, the most common assurance that masonry fasteners will satisfy the demands of masonry design is provided through certification by well-established third-party evaluation agencies.

When attaching structural and non-structural components to masonry, understanding the embedded fastening options along with their advantages, limitations and challenges is the first step to a successful connection. No Thanks X Understanding the embedded fastening options Subscribe to Masonry Messenger to receive the masonry resources and information you need to stay current.

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