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i <br /> � <br /> i <br /> I <br /> i <br /> i <br /> r'! � / ----, <br /> . -`. `r'`L I <br /> � n�.:,: � <br /> Donald R. Westlin, Architect ' ' <br /> Januar�� 8, 1990 i <br /> Page Four ;� <br /> V15. Fire dampers shuuld be inctalled in the following locations as per <br /> Section 4306(,j). <br /> V6. Uuct penetrations oP area or occupancy separation walls with I <br /> ratings ar two-haurs or less. <br /> Ja. Ducts penetrating shafts (se� excepCion). <br /> �,C� Ducts penetrating the ceiling oP Pire-resistive floor-ceiling or <br /> : roof-ceiling assemblies. <br /> � Gypsum board ceilings in con�unctior, with Pire-resistive assemblies <br /> should be supported at intervals not exceuding 16 inches. Item 13, <br /> Table No. 43-C (See al�o Footnote a). <br /> � Lhless speciPically allowed by an evaluatton report nr sutstantiated <br /> with test data under Section 107, sper.ial coverings Por Ploors, <br /> balconies, patios, etc., cannot replace any part oP a Pire-resist:ve <br /> assembly in reference to Footnote No. 14, Table No. 43-C. Attention <br /> is directed to landings and decks. Note that at weather exposed <br /> locations higher density and greater strength are required iP <br /> lightweight concrete is used. <br /> y2�. Double-layer gypsum ceilings . in con,junction with fire-resistive <br /> assemblies should be suppported at intervals not exceeding 24 <br /> inches. Nailing should be in accordance with Item 21, Table No. 43-C <br /> (See also Footnote a). <br /> �[9. A Ploor or landing not mcre than 1-1/2 inches below the threshold is <br /> required on each side oP an exit doar. Section 3304(i). <br /> � Risers on stairways should not be less than 4 inches nar exceed 7 <br /> inches, and runs should not be less than 11 inches when serving more <br /> than 9 occupants. Section 3306(c). <br /> �3i� The top oP handra.ils are to be plsced not less than 34 inches nor <br /> more than 38 inches above the nosing oP treads. Section 3306(�). <br /> Two handrails are required where stairways are 44 inclies or more in <br /> width. <br /> �j�: The handgrip portion oP handrails should not be less than 1-1/2 <br /> inches nor more than 2 ir,ches in cross sectional dimension or the <br /> shape should provide an equivalent gripping surPace. The <br /> acceptability oP equivalent shapes should be determined by the <br /> building official. The handgrip portion should have a smooth surface <br /> with no sharp corners. Section 3306(,j). <br /> I <br /> i <br /> I <br />