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. Al 1 oti•rabl e Header Spans - For openi ngs i n outside beari ng ��ral 1 s on <br /> one s ory ran�e u> >ngs �•�i th center beari ng wal 1 s (assumi ng a <br /> maximum joist span of 14 feet) . <br /> 2 - 2 X 4's - 3 ft. maximum on ed�e) <br /> 2 - 2 X 6's - 6 ft. maximum �w/Dou�las Fir) , 5 ft. maximum (w/Hem-Fir) <br /> 2 - 2 X 8's - 8 ft. maximum (w/Douglas Fir) , 7 ft. maximum (w/Hem-Fir) <br /> 2 - 2 X 10's - 10 ft. maximum (w/Douglas Fir) , 9 ft. maximum (w/Hem-Fir) <br /> 2 - 2 X 12's - 12 ft. maximum (w/Douglas Fir) , 11 ft. maximum (�,�/Hem-Fir) <br /> Gara e Door Headers. �he follo��ing table is for use when the garage <br /> oor opening �s 6 feet. <br /> No roof load 2 - 2 X 12' s <br /> Nip roof 2 - 2 X 14 's <br /> Full roof load . 3 - 2 X 14' s* <br /> * Shall be Pao. 1 Douglas Fir or equivalent desi�ned beam. <br /> NOTE: For l8-foot garage door openings and/or garages longer <br /> than 24 feet, special design is required. <br /> 1 ) Allowable Rafter Spans for roofs having a pitch of 3-12 or greater <br /> where the wood used is Douglas Fir n2 or better: <br /> Rafters 40 lb. Live Load 30 lb. Live Load <br /> DF'L. 12�� O.C. 16" O.C. 24'' O.C. 12" O.C. 16" O.C. 24" O.C. <br /> 2 X 4's 8' 5" 7' 4" 6' 0" 9' 6" 8' 3" 6' 9" <br /> 2 X 6 s 3' 3" 11 6 9' 5" 15' 0" 12' 11 " 10' 7" <br /> 2 X 8's 17' 6" 15' 2" 12' 5" 19' 9" 17' 1 " 13 ' 11 " <br /> 2 X 10' s 22' 4" 19' 4" 15' 10" 25' 2" 12' 10" 17 ' 10" <br /> 2) Allo��rable Rarter Spars for roofs having a pitch of 3-12 or greater <br /> where the wood used is Hem-Fir n2 or better: <br /> Rafters 40 lb. Live Load 30 lb. Live Load <br /> 72" O.C. 16" O.C. 24" O.C. 12" O.C. 16" Q.C. 24" O.C. <br /> H-F - <br /> 2 X 4' s 7' 6" 6' 6" 5' 4" II' 6" 7' 4" 6' 0" <br /> 2 X 6' s 11 ' 10" �0' 3" 8' 4" 1 ' 4" 1 ' " ' " <br /> 2 X 8' s 15' 7" 13' 6" 11 ' 0" 17' 7" 15' 2" 12 ' S" <br /> 2 X 10' s 19' 10" 17' 2" 14' 1 " ?2' 5" 19' 5" 15 ' 10" <br /> Allowable Ceilinq Joist Spans: <br /> Ceilinas Douglas Fir �2 Hem-Fir n2 <br /> 12" O.C. 16" O.C. 24" O.C. 12" O.C. 16" O.C. 24" O.C. <br /> 2 X 4 ' s 12' 8" 11 ' 6" 10' 0" 11 ' 10" 10' 9" g' 5" <br /> 2 X b' s 19' 11 " 18' 1 ' 15' 6" 18' 8" 16' 11 " 3' 8' <br /> 2 X 8 s 26' 2" 23' 10" 20' S" 24' 7" 22' 4" 18' 0" <br /> 2 X 10' s 33' S" 30' S" 26' 0" 31 ' 4" 28` 6" 22' 11 " <br /> Allowable Floor Joist Spans: <br /> Floors Douglas Fir �2 Hem-Fir �2 <br /> 12" O.C. 16" O.C. 24" O.C. 12" O.C. 16" O.C. 24" O.C. <br /> X 6's 10' 11" 9' 11 " B' 6" 10' 3" 9' 4" 7 ' 6" <br /> X 8' s 14 5" 13' 1" 11 ' 3 ' 13' 6" 12' 3" 9 ' 11 " <br /> 2 X ]0' s 1B' S" 16' 9" 14 ' 4" 17 ' 3" 15' 8" 12' 8" <br /> 2 X 12's 22' 5" 20' 4" 17' 5" 21 ' p" lq' 1 " --j5�- �'� <br />