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� <br />�a � <br />b �W <br />b H ai <br />• <br />H �K y <br />o m o <br />� N M <br />� H � <br />°z n o <br />c~i� n <br />z y � <br />� t� y <br />Gp N H <br />n O Ul <br />��c�a <br />H O 4 <br />/,. ; <br />I I��'j, <br />,_. <br />�--- (d) Duct Materia► anu Discharge Point. Exhaust ducts shall be c..asuucted of <br />' steel having a thickness not less than indicated in the table below: <br />� <br />8" or less <br />Over 8" to 18", inclusive <br />Over 18" to 30", inclusive <br />Over 30" <br />i�0. 24 <br />NO. 22 <br />NO. 2� - <br />U.. 1 R . <br />� <br />The discharge point forexhaust ducts in a paint spray booth shall be not less than �, r'' <br />6 feet from adjoining combustible construction nor less than 25 feet from adjoining •' <br />exterior wall openings. � , <br />EXCEPTION: 'Che dischazge point for exhaust ducts in wateT=wash spray ; <br />booths is not required. <br />The material used for construction of ducts is always required to be steel. However, the thickness <br />ofthesteelvaziesdependingonthediameteroftheduct.'��e.lforduc eover30i ches ndlameter. <br />steel for ducts 8 inches or less in diamerer to No. 18 gag <br />The discharge point for exhaust ducts is not permitted closer than 6 feet from combustible consuvo- <br />water�-wash filt r syst ms o be n�egu ated s n�ce these flt rspare extremely effecuve at removing <br />contaminants from exhaust air. <br />POINT OF DISCHARGE <br />m <br />)UCT <br />iHING <br />�OOF COVERING <br />COMBUSTIBLE <br />ROOFDECK <br />'OMBUSTIBLE <br />OOFFRAMING <br />Note: Prescriptive provle� ���nes arefound in the� Unform Mechanical Codteon of exhaust <br />outlets from prop Y <br />24 <br />