Seismic adapter
AssigneeAutomatic Fire Control, Incorporated
InventorKraig Kirschner
Life of this patent
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Abstract
A seismic adapter for attachment to a steel web joist. The joist includes a pair of angled elements which extend parallel to one another with a cord space therebetween. The adapter includes an anchor plate juxtaposed with the upper surface of the element pair and an engagement plate engaging the parallel edges of the legs of the element pair. A threaded stud attaches to the anchor plate and extends through the engagement plate. The extension of the stud provides for the attachment to a hanger adapter brought together by a nut on the stud. The engagement plate includes a flat anchor portion and upstanding engagement portions having distal edges with interlocking engagement profiles including a tongue and outwardly extending shoulders to receive the parallel edges of the angle element pair.
Claims9
A seismic suspension system for a web joist, comprising
- an anchor plate including a first hole therethrough;
- an engagement plate including a flat anchor portion having a second hole therethrough and two flat upstanding engagement portions, one to either of two opposed sides of the flat anchor portion, each upstanding engagement portion being at an obtuse angle substantially greater than 900 to the flat anchor portion and having a distal edge with an engagement profile including two shoulders with a tongue therebetween, the tongue and the shoulders defining concavities therebetween;
- a stud extending from the first hole and threadably engaged therewith to and beyond the second hole with a threaded engagement beyond the second hole.
Dependencies are inferred from the claim text.