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SENT BY: NICOLI ENGINEERING, INC.; 503 694 3636; JUL•75•03 11 :09A4; PAGE 2/2 <br /> � � <br /> ' `Nicoli Engineerinc� , Inc. <br /> PO Box 23784 Tigard, Oregon 97281 • Phone: (503)620-2086 • Fax:(503)684-3636 <br /> July 15, 2003 NEI#03-0602 <br /> Deric Von Schlieder <br /> Botesch. Nash and Hall Architects, P.S. <br /> 2515 Hewitt Avenue <br /> Everett, WA 98201 <br /> RE: Regional Special Events Center <br /> Everett,Washington <br /> Dear Mr. Von Schlieder <br /> We have reviewed the memorandum from l�ony �ee of Everett Public Works dated June <br /> 30, 2003 regarding his wncems with the ceflfng "clouds". The following is our response <br /> and our undersfanding of seismic bracing of suspended ceiling systems: <br /> During a seismic event, a suspended ceiling system will move laterally. Uiagonal splay <br /> wires are installed to resist the Iaterai movement. When the splay wires go into tension, <br /> the ceilir.g �xi!! tend to `swing" up due te the slepe of the wires �he upward rrx�vement, <br /> or torce, is resisted at the point o(attachment of the splay wires by the compression <br /> posts. There are no other upliR torces generated in the ceiling from the lateral <br /> movement. To further clarify, the U.B C. Standard 25-2 does not require ceilings to be <br /> attached to walls at the perimeter. <br /> Upon further review of the proposed conslruction of the "clouds", we recommend that <br /> the compression posts 6e attached to both the upper and lower layers of ceiling grid <br /> that make up the cloud. The splay wires should be attached to the lower layer. <br /> Please call if you have any questions or need further assistance. <br /> p,N �o <br /> SII1CP.fQIy. Q�of W�h�,y�9 <br /> � � 2 <br /> � �39� <br /> �Srov E�'� <br /> e<rir.cs 2 3 03 � <br /> Shawn Turrentine. E.I.T. S. Ala� Bodnar, P.E. <br /> �vz�csoi eaw.n.i.�c+r a..u.�.�cr��i�iN�w�e>.d ea <br /> 9025 SW Cenler Street Tg�nf,Diogon 97281—www.niwicrgineenng.Gom <br /> �I� <br />