Architectural · A-NKRAG

Suspended Tee Grid Seismic Bracing and Compression Post

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A suspended ceiling grid system incorporates main runners and cross tees tied back to the structure above using twelve-gauge hanger wires parallel to both the main runners and cross tees. A vertical strut compression post, with electrical metallic tubing explicitly prohibited, extends up to the structure above at twelve feet on center each way, starting a maximum of six feet from the perimeter edge. Vertical compression struts for heights up to eight feet use one three-and-five-eighths-inch twenty-five-gauge metal stud at twelve feet on center. Struts between eight and ten feet use two one-and-five-eighths-inch twenty-five-gauge metal studs at twelve feet on center, oriented perpendicularly with the flange of one stud connected to the web of the other and fastened every twelve inches along their length. Seismic bracing and restraint requirements apply specifically to seismic design categories D, E, and F.

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