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. 23. In addition to the re�uire�ents o= 30CA Bas ic Buildizg Code/ <br /> 1970, for the protection of structures agai,nst subterrancan ter�ites , <br /> a continuous metal shield wi.th solid joints sha11 be provided over <br /> foundation wa11s , piers and on oipes to pr�vent ter,nits fyom gainin� <br /> access to the st:-ucture, Such shields sha11 be for�ed of co�osion <br /> r=s is tant ma teria 1 f i�1y ins erted in the c.^asonry, or bet•ae�n the <br /> foundation and any wood, with a projection ed�e bent downWa�d at a;� <br /> angle o� '�5 degrees and e.�tending horizontally at least one �,ch <br /> from the face or the founc�ation, Copper clad building paper or <br /> si�ilar ;r.�aterial shall not be used to satisiy the require�er.ts <br /> of this section; provided, that chenic3l tr�atment of adjacer.t soil <br /> may be substituted in lieu or such shielding , the manner and pzoof <br /> ot which treatment shall be o� such natura as sha11 satisf� the <br /> �uilding Official of the efficacy therevf. <br /> 2'+. The requirements of the aforesa�d Life Sa?=�t� Code, ai�h <br /> regar3 to door locks a:a hereby modified insorar as the sane �av be <br /> applicable to mercantile, office or industrial occupancies , if t�!ere <br /> is a readilp visibla, durable sign pLaced on or adjacer.t to t:�e re- <br /> quired e.�cit door stating "This door shall res�ain �nlocked during <br /> bus iness hour3 , " �.�hich s ign sha 11 be in I�tters ^ot less than one <br /> inch hi�h on a contras ting background, pr�vided the loc?<ir.g de^�ice <br /> on such door i� or a t3pe which read:ly shows when the sane is <br /> locked or is not locked and provided that use of such deor to satisf� <br /> fire exit requirements is approved in �riting by the Buildino Of�i- <br /> cia1. Flush or surface bvlts shall not be used cmless the same are i <br /> of not less than one-half inch round stock with a thrae-quarter incn � <br /> minimum diameter control knob and that there be no more than t-ao <br /> 9uch bolts to an exit opening both of which are readilq accessible. <br /> Flush bolts on inactive doors which lock and unlock si�ul�aneously <br /> with an active door are permitted. <br /> 27 . �� 11 s tnsc tur31 lu;aber and Q1;r,�ToQd sha 11 car=-� t?�e �:ade <br /> maricLn� ot an authorizzd grada a��nc��. T?:e st2,;:p stlall conta �n: <br /> ( 1) Grade Rulas �;_ncy, (2) Grads oL L�ber, (3) Speci�s , ar.d ('-� ) <br /> ;ianu��ctu:er. <br /> 28 . �11 buildin;s t;�at have unarota�_=d .:'cor� , �= roo=s , �r <br /> bath, shall be prote�ted :�ith ceilir:�s wnic: sha11 �:ave a =i:e �e- <br /> sistaaca ratins et not less than one hour ;aith the e.�c_e�tion oi <br /> buildin;s with indus tri31 cccupancies , one ar.d t-�o tan:.l� �.ael.lia�s , <br /> i123V•� ti:nber construction, build;ngs pr�viced -�it!�+ aporo���d sa�ir.'.�cla= <br /> slstem9 , and detache3 �rivate �arages . <br /> 35 . Ades�uate foctings extending a mini�.� o� tnree reet be- <br /> Iow grade shall be provided tor a11 buildings and structures e.�c�pt <br /> � accessory buiZdings the faotings for which sha11 extend not less <br /> than 18 inches below gsade. Where a crawl space is provided, <br /> it shall be not less than 30 inches in heig?�t measured bet•.�een the <br /> �- bottoa oi f ioor j o is ts and grour.d, <br />