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<br />11 <br /> <br />;i <br /> <br />I <br /> <br />I <br />I <br /> <br />1.1 Size of <br /> <br />I <br />'!Ceiling <br /> <br />2 x 4 <br />2 x 4 <br /> <br />" <br /> <br />joist <br />Joist <br /> <br />Spacing of joist <br /> <br />Maximum allowed span <br /> <br />12" 11' 6" <br />16" 10' 6" <br />12" 18' <br />16" 16' <br />12" 24' <br />16" 21t <br /> <br />2 x 6 <br />2 x 6 <br />12 x 8 <br />! 2 x 8 <br />I <br />I <br />I Allowable <br />I <br />2 x 4 <br />2 x 4 <br />12 x 4 <br /> <br />:12 x 6 <br />! 2 x 6 <br />12 x 6 <br />I <br />r~ ~ ~ <br /> <br />12 x 8 <br />il <br />jI Trusses on 24 t Centers 5/8" Plywood Roof Ceiling 5/8" Sheet Rock <br />I <br /> <br />i <br />I Allowable <br />i <br />i\ 2 x 8 <br />!12 x 8 <br />I'i' 2 x 10 <br />1,2 x 10 <br /> <br />ll~ ~ i~ <br /> <br />!IAllowable spans for door and window headers <br /> <br />!I Length of opening <br /> <br />'3' x 6" <br />4' X 6" <br />6' x 8" <br />I 9 t X 6" <br />I 12' x 8 tt <br />I <br />II <br />II <br />Ii <br />:las follows: <br />!I <br />!I <br />'I <br />I <br />I <br />II <br />II <br />I <br />II <br />II <br />II: <br /> <br />spans for rafters <br /> 12" lOt <br /> 16" 8' 6" <br /> 24" 7' <br /> 12" 17' 8" <br /> 16" 15' 6" <br /> 24" 12' 6" <br /> 12" 23' 6" <br /> 16" 20' 6" <br /> 24" 16' 6" <br /> <br />spans for floor joist <br /> 12" 13t 6ft <br /> 16" 12' <br /> 12" 17' <br /> 16" 15' 6" <br /> <br />12" <br />16'1 <br /> <br />20' 6" <br />19' <br /> <br />Dimension <br />4" x 4" <br />4" x 6" <br />4" X 8" <br />4" X 10" <br />4" X 12" <br /> <br />SECTION 5. <br /> <br />Section 6, subsection 6-59 is amended to read <br /> <br />A sub-floor having a m~n~mum thickness of five-eights (5/8) <br />inches shall be required. All such sub-floor shall be laid <br />diagonally. Where plywood is used, on 16" centers a Millimum <br />of 1/2" Thick 5 Ply.; on 20" Centers. Miaimum of 5/8" Thick <br />5 Ply.; on 24" Centers a Minimum of 3/4" Thick 5 ply. <br />