The Vibration Isolation and Seismic Control Manufacturers Association (VISCMA) have released two documents for HVAC engineers. “Attachment of Sheet Metal Curbs to Roof Decks” examines the frequently overlooked design challenge of attaching seismically rated sheet metal curbs to structures. The resource addresses the assumption that an attachment will carry only the combination of a weight load and horizontal shear load generated by seismic forces. Secondly, “VAV Boxes and Small HVAC Component Restraints” outlines up-to-date technologies as defined by building codes. It examines terminal units and other small HVAC components in buildings that require seismic restraints. Visit www.viscma.com for more information.
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