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� .;�:� tie �.���ti � n�� �i ���r.; : <br /> 411� licllc�uc 1l"ae .�oulhc,iFt �tiuitc� ]01 <br /> 11c Il, cuc. u':{�:hin�;l,�n .�c����a <br /> (^_.�o) ��>>�aa���� <br /> June 17, 1983 <br /> Roy Dunham Company <br /> P. 0. Box 6217 <br /> Bellevue , Washington 9P007 <br /> Attention: Roy Dunham <br /> Re : Casino Square Our Job No. 82-215N � <br /> Everett , H'ashington <br /> Dear Sir : <br /> In regard to your request for substiCutions in the concrete <br /> design on the above referenced pro�ect , we are approving the <br /> following chan�es , with which our structural engineer is in <br /> agreement : <br /> A concrete design mix of 3,000 psi is acceptable for <br /> tilt up concrete panels and a design mix of 2 ,500 psi <br /> is acceptable for floor slubs. Hoke��er, cancrete <br /> supplier must provide test data and design mix sample <br /> prior to pouring which substantiate ability to deliver <br /> a guaranteed strength concrete mix. <br /> Floor slab thickness may be reduced to a minimum of <br /> 4 inches and a reinforcing mesh size of 6 x 6 a+1 .4 r. <br /> w1 .4 is acceptable. <br /> Slab reinforcing mesh must be provided , hr�wever, <br /> regardless of slab thickness. <br /> Anv further substitiitions to be considered on this projec� <br /> will be promptly evaluated. <br /> Sincerely, <br /> Ned Nelson, A.I .A. <br /> cc : D & D Investment p, � n � n � � �,^ <br /> Ratti/Fossatti Associates ��, �� � <br /> City of F.verett Building Dept . <br /> ��U{l� `: <br /> C�TY GF EG'ER�TT <br /> tnspection Dept, <br /> Nember Amencnn Intililule .�f Ar.hd��cl� <br /> i <br /> � <br />