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BOEING COMMERCIAL AIRPLANE COMPANY P•O. Box3707 <br /> Seettle,Weshington 98124 <br /> 747 Division <br /> A Division of The Boeing Company <br /> June 9, 1978 <br /> E-6]60-8-104 <br /> City of Everett Building Director <br /> Everett City Hall <br /> Everett, Washington 98201 <br /> Attention: Kenneth Callahan <br /> Subject: Building Permit Plan Check - Buildings 40-85 & 40-86. <br /> Dear Ken: <br /> Persuant to our meeting regarding the design of Buildings 40-85 and <br /> 40-86, the Boeing Company has made an evaluation of the aluminum door <br /> frames as proposed by the Brower Company. <br /> As you are aware, the 3y;" wall thickness frame has been tested per ASTM <br /> 20 Min Fire Endurance Test. This test has been reviewed and evaluated <br /> by the Boeing Company Security-Fire Protection Engineering Unit as it <br /> may apply to a 3" wall thickness proposed by the design of the buildings. <br /> Eoeing has found the use of the 3" wide extended door frames for use in <br /> corridors in buildings 40-85 and 40-86 acceptable for the intended appli- <br /> cation. <br /> Boeing requests that the city of Everett concur in the acceptance of this <br /> 3" door frame for the int.ended use in these buildings , and approve its use <br /> as a rated door frame. <br /> Yours very truly, <br /> BOEING COMMERCIAL AIRPLaNE COMPANY <br /> 74 Division <br /> n Emery <br /> Facilities Construction Supervisor <br /> JE:ar <br />