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www.SSMA.com 65Complies With 2009, 2012 and 2015 IBC <br />Exterior Allowable Ceiling/Soffit Spans (S-Sections) - L/240 <br />Section Fy (ksi) <br />35 psf 40 psf 50 psf <br />Lateral Support of Compression Flange Lateral Support of Compression Flange Lateral Support of Compression Flange <br />Unsupported Midspan Unsupported Midspan Unsupported Midspan <br />Joist Spacing (in) on center Joist Spacing (in) on center Joist Spacing (in) on center Joist Spacing (in) on center Joist Spacing (in) on center Joist Spacing (in) on center <br />12 16 24 12 16 24 12 16 24 12 16 24 12 16 24 12 16 24 <br />250S137-33 33 6' 6" 5' 11" 5' 1" e 7' 3" 6' 7" 5' 5" e 6' 2" 5' 7" 4' 10" e 6' 11" 6' 3" 5' 1" e 5' 9" 5' 2" 4' 4" e 6' 5" 5' 7" e 4' 6" e250S137-43 33 7' 1" 6' 6" 5' 7" 7' 10" 7' 2" 6' 3" 6' 10" 6' 2" 5' 4" 7' 6" 6' 10" 5' 10" 6' 4" 5' 8" 4' 11" 7' 0" 6' 4" 5' 3" 250S137-54 50 7' 9" 7' 1" 6' 4" 8' 5" 7' 8" 6' 8" 7' 5" 6' 10" 6' 1" 8' 1" 7' 4" 6' 5" 7' 0" 6' 5" 5' 9" 7' 6" 6' 9" 5' 11" 250S137-68 50 8' 6" 7' 9" 6' 11" 9' 0" 8' 2" 7' 1" 8' 2" 7' 6" 6' 8" 8' 7" 7' 10" 6' 10" 7' 7" 7' 0" 6' 2" 8' 0" 7' 3" 6' 4" 250S162-33 33 7' 4" 6' 7" 5' 7" e 7' 7" 6' 11" 5' 10" e 7' 0" 6' 3" 5' 3" e 7' 3" 6' 7" e 5' 5" e 6' 5" 5' 8" e 4' 9" e 6' 9" 5' 11" e 4' 10" e250S162-43 33 8' 0" 7' 3" 6' 3" 8' 3" 7' 6" 6' 7" 7' 8" 6' 11" 5' 11" 7' 11" 7' 2" 6' 3" 7' 1" 6' 4" 5' 5" 7' 4" 6' 8" 5' 8" 250S162-54 50 8' 10" 8' 0" 7' 0" 8' 10" 8' 0" 7' 0" 8' 6" 7' 8" 6' 9" 8' 6" 7' 8" 6' 9" 7' 10" 7' 2" 6' 3" 7' 10" 7' 2" 6' 3" <br />250S162-68 50 9' 5" 8' 7" 7' 6" 9' 5" 8' 7" 7' 6" 9' 0" 8' 3" 7' 2" 9' 0" 8' 3" 7' 2" 8' 5" 7' 7" 6' 8" 8' 5" 7' 7" 6' 8" <br />250S200-33 33 8' 0" 7' 1" 6' 0" e 8' 1" 7' 4" 6' 1" e 7' 7" 6' 9" e 5' 8" e 7' 8" 7' 0" e 5' 8" e 6' 11" e 6' 1" e 5' 1" e 7' 2" e 6' 3" e 5' 1" e <br />250S200-43 33 8' 9" 7' 11" 6' 11" 8' 9" 7' 11" 6' 11" 8' 4" 7' 7" 6' 7" 8' 4" 7' 7" 6' 8" 7' 9" 7' 1" 5' 11" e 7' 9" 7' 1" 6' 0" e <br />250S200-54 50 9' 4" 8' 6" 7' 5" 9' 4" 8' 6" 7' 5" 9' 0" 8' 2" 7' 1" 9' 0" 8' 2" 7' 1" 8' 4" 7' 7" 6' 7" 8' 4" 7' 7" 6' 7" 250S200-68 50 10' 0" 9' 1" 7' 11" 10' 0" 9' 1" 7' 11" 9' 7" 8' 9" 7' 7" 9' 7" 8' 9" 7' 7" 8' 11" 8' 1" 7' 1" 8' 11" 8' 1" 7' 1" <br />362S137-33 33 7' 2" 6' 8" 5' 10" e 9' 0" 7' 11" e 6' 7" e 6' 11" 6' 4" e 5' 7" e 8' 6" e 7' 6" e 6' 2" e 6' 6" 5' 11" e 5' 1" e 7' 8" e 6' 9" e 5' 6" e362S137-43 33 7' 10" 7' 3" 6' 5" 10' 2" 9' 1" 7' 7" 7' 6" 6' 11" 6' 2" 9' 8" 8' 7" 7' 2" e 7' 1" 6' 6" 5' 8" e 8' 10" 7' 9" 6' 6" e362S137-54 50 8' 5" 7' 9" 6' 11" 11' 3" 10' 2" 8' 10" 8' 1" 7' 6" 6' 8" 10' 9" 9' 9" 8' 3" 7' 7" 7' 1" 6' 4" 10' 0" 9' 1" 7' 5" 362S137-68 50 9' 2" 8' 5" 7' 6" 12' 0" 10' 11" 9' 6" 8' 9" 8' 1" 7' 3" 11' 6" 10' 5" 9' 1" 8' 3" 7' 7" 6' 9" 10' 8" 9' 8" 8' 5" 362S162-33 33 8' 2" 7' 6" e 6' 6" e 9' 10" e 8' 8" e 7' 1" e 7' 11" 7' 2" e 6' 2" e 9' 3" e 8' 1" e 6' 7" e 7' 4" e 6' 8" e 5' 8" e 8' 4" e 7' 3" e 5' 11" e362S162-43 33 8' 11" 8' 3" 7' 3" 11' 0" 10' 0" 8' 4" e 8' 7" 7' 11" 6' 11" 10' 6" 9' 5" 7' 10" e 8' 0" 7' 4" 6' 4" e 9' 8" 8' 6" e 7' 0" e <br />362S162-54 50 9' 7" 8' 10" 7' 11" 11' 9" 10' 8" 9' 4" 9' 3" 8' 7" 7' 8" 11' 3" 10' 3" 8' 11" 8' 8" 8' 0" 7' 3" 10' 6" 9' 6" 8' 0" <br />362S162-68 50 10' 5" 9' 7" 8' 6" 12' 7" 11' 5" 10' 0" 10' 0" 9' 3" 8' 3" 12' 1" 10' 11" 9' 7" 9' 5" 8' 8" 7' 9" 11' 2" 10' 2" 8' 11" <br />362S200-33 33 9' 3" 8' 4" e 7' 1" e 10' 6" e 9' 1" e 7' 5" e 8' 10" e 7' 11" e 6' 8" e 9' 10" e 8' 6" e 6' 11" e 8' 1" e 7' 3" e 6' 1" e 8' 9" e 7' 7" e 6' 3" e <br />362S200-43 33 10' 4" 9' 5" 8' 2" e 11' 7" 10' 7" 8' 11" e 9' 11" 9' 0" 7' 9" e 11' 1" 10' 1" 8' 4" e 9' 2" 8' 4" e 7' 1" e 10' 4" 9' 2" e 7' 6" e362S200-54 50 11' 1" 10' 4" 9' 3" 12' 5" 11' 4" 9' 11" 10' 9" 9' 11" 8' 11" 11' 11" 10' 10" 9' 5" 10' 1" 9' 4" 8' 4" 11' 1" 10' 1" 8' 9" 362S200-68 50 12' 0" 11' 1" 9' 11" 13' 4" 12' 1" 10' 7" 11' 7" 10' 8" 9' 7" 12' 9" 11' 7" 10' 1" 10' 10" 10' 0" 9' 0" 11' 10" 10' 9" 9' 5" <br />400S137-33 33 7' 4" 6' 10" 6' 0" e 9' 5" e 8' 4" e 6' 11" e 7' 1" 6' 7" e 5' 9" e 8' 11" e 7' 10" e 6' 6" e 6' 8" e 6' 1" e 5' 4" e 8' 1" e 7' 1" e 5' 10" e400S137-43 33 8' 0" 7' 5" 6' 7" 10' 8" 9' 6" 8' 0" e 7' 9" 7' 2" 6' 4" 10' 1" 9' 0" 7' 7" e 7' 3" 6' 9" 5' 11" e 9' 3" 8' 2" 6' 10" e400S137-54 50 8' 8" 8' 0" 7' 2" 12' 2" 11' 0" 9' 6" 8' 4" 7' 8" 6' 10" 11' 7" 10' 7" 8' 10" 7' 10" 7' 3" 6' 6" 10' 9" 9' 8" 7' 11" 400S137-68 50 9' 4" 8' 7" 7' 8" 13' 0" 11' 9" 10' 4" 9' 0" 8' 4" 7' 5" 12' 5" 11' 3" 9' 10" 8' 5" 7' 10" 7' 0" 11' 6" 10' 6" 9' 2" 400S162-33 33 8' 5" 7' 9" e 6' 9" e 10' 4" e 9' 1" e 7' 6" e 8' 1" 7' 5" e 6' 5" e 9' 9" e 8' 6" e 7' 0" e 7' 7" e 6' 11" e 5' 11" e 8' 10" e 7' 8" e 6' 3" e <br />400S162-43 33 9' 2" 8' 5" 7' 6" 11' 9" 10' 5" 8' 9" e 8' 10" 8' 2" 7' 2" e 11' 2" 9' 10" 8' 3" e 8' 3" 7' 7" 6' 7" e 10' 2" 8' 11" e 7' 5" e <br />400S162-54 50 9' 10" 9' 1" 8' 2" 12' 9" 11' 7" 10' 1" 9' 6" 8' 9" 7' 10" 12' 2" 11' 1" 9' 6" 8' 11" 8' 3" 7' 5" 11' 3" 10' 3" 8' 6" <br />400S162-68 50 10' 8" 9' 10" 8' 9" 13' 7" 12' 4" 10' 10" 10' 3" 9' 5" 8' 5" 13' 0" 11' 10" 10' 4" 9' 8" 8' 11" 7' 11" 12' 1" 11' 0" 9' 7" <br />400S200-33 33 9' 7" e 8' 8" e 7' 5" e 11' 0" e 9' 7" e 7' 10" e 9' 2" e 8' 3" e 7' 0" e 10' 4" e 9' 0" e 7' 4" e 8' 5" e 7' 6" e 6' 4" e 9' 3" e 8' 0" e 6' 7" e <br />400S200-43 33 10' 7" 9' 9" 8' 6" e 12' 6" 11' 4" 9' 6" e 10' 2" 9' 4" 8' 1" e 12' 0" 10' 10" e 8' 10" e 9' 6" 8' 8" e 7' 5" e 11' 1" e 9' 8" e 7' 11" e400S200-54 50 11' 5" 10' 6" 9' 5" 13' 5" 12' 2" 10' 8" 11' 0" 10' 2" 9' 1" 12' 10" 11' 8" 10' 2" 10' 4" 9' 7" 8' 7" 11' 11" 10' 10" 9' 3" 400S200-68 50 12' 4" 11' 4" 10' 2" 14' 5" 13' 1" 11' 5" 11' 10" 10' 11" 9' 10" 13' 9" 12' 6" 10' 11" 11' 2" 10' 4" 9' 3" 12' 9" 11' 7" 10' 2" 400S250-43 33 11' 10" 10' 9" 9' 2" e 13' 2" 11' 11" e 9' 8" e 11' 4" 10' 2" 8' 8" e 12' 7" 11' 2" e 9' 1" e 10' 5" 9' 4" e 7' 10" e 11' 6" e 9' 11" e 8' 1" e400S250-54 50 12' 11" 12' 0" 10' 7" 14' 2" 12' 10" 11' 3" 12' 6" 11' 6" 10' 1" 13' 6" 12' 4" 10' 9" 11' 9" 10' 9" 9' 4" 12' 7" 11' 5" 10' 0" 400S250-68 50 13' 11" 12' 11" 11' 7" 15' 2" 13' 9" 12' 0" 13' 5" 12' 5" 11' 1" 14' 6" 13' 2" 11' 6" 12' 8" 11' 8" 10' 5" 13' 6" 12' 3" 10' 8" <br />600S137-33 33 8' 5" 7' 10" e 7' 0" e 11' 8" e 10' 6" e 8' 10" e 8' 2" e 7' 7" e 6' 9" e 11' 1" e 9' 11" e 8' 5" e 7' 8" e 7' 1" e 6' 4" e 10' 2" e 9' 1" e 7' 5" e600S137-43 33 9' 1" 8' 5" 7' 7" e 12' 11" 11' 9" e 10' 1" e 8' 9" 8' 2" 7' 4" e 12' 5" 11' 3" e 9' 7" e 8' 3" 7' 8" 6' 11" e 11' 6" e 10' 4" e 8' 9" e <br />600S137-54 50 9' 8" 9' 0" 8' 1" 13' 11" 12' 11" 11' 7" 9' 4" 8' 8" 7' 9" 13' 5" 12' 6" 11' 2" 8' 10" 8' 2" 7' 4" 12' 8" 11' 9" 10' 4" <br />600S137-68 50 10' 5" 9' 7" 8' 7" 14' 9" 13' 8" 12' 4" 10' 0" 9' 3" 8' 4" 14' 3" 13' 3" 11' 10" 9' 5" 8' 9" 7' 10" 13' 5" 12' 6" 11' 2" <br />600S162-33 33 9' 8" e 9' 0" e 8' 1" e 13' 4" e 11' 11" e 10' 1" e 9' 4" e 8' 8" e 7' 10" e 12' 7" e 10' 11" e 8' 11" e 8' 10" e 8' 2" e 7' 4" e 11' 3" e 9' 9" e 7' 11" e <br />600S162-43 33 10' 4" 9' 7" 8' 8" e 14' 7" 13' 2" e 11' 3" e 10' 0" 9' 3" 8' 4" e 13' 11" e 12' 7" e 10' 8" e 9' 5" 8' 9" e 7' 11" e 12' 10" e 11' 6" e 9' 9" e600S162-54 50 11' 0" 10' 3" 9' 2" 15' 10" 14' 9" 13' 2" 10' 8" 9' 10" 8' 10" 15' 4" 14' 3" 12' 8" 10' 0" 9' 4" 8' 4" 14' 5" 13' 4" 11' 5" 600S162-68 50 11' 10" 10' 11" 9' 10" 16' 10" 15' 8" 14' 1" 11' 5" 10' 7" 9' 5" 16' 3" 15' 1" 13' 6" 10' 9" 9' 11" 8' 11" 15' 4" 14' 3" 12' 8" 600S200-33 33 11' 2" e 10' 4" e 9' 2" e 14' 6" e 12' 10" e 10' 1" e 10' 10" e 10' 0" e 8' 10" e 13' 5" e 11' 7" e 9' 6" e 10' 2" e 9' 4" e 8' 2" e 12' 0" e 10' 4" e 8' 6" e600S200-43 33 12' 0" 11' 2" e 10' 0" e 16' 5" e 14' 8" e 12' 1" e 11' 7" 10' 9" e 9' 8" e 15' 8" e 13' 10" e 11' 4" e 10' 11" e 10' 2" e 9' 0" e 14' 4" e 12' 5" e 10' 2" e600S200-54 50 12' 9" 11' 10" 10' 8" 18' 5" 16' 8" 14' 0" 12' 4" 11' 5" 10' 4" 17' 7" 16' 0" 13' 1" 11' 7" 10' 9" 9' 9" 16' 4" 14' 4" 11' 9" 600S200-68 50 13' 8" 12' 8" 11' 4" 19' 7" 17' 11" 15' 8" 13' 2" 12' 2" 10' 11" 18' 10" 17' 2" 15' 0" 12' 5" 11' 6" 10' 4" 17' 6" 15' 11" 13' 11" <br />600S250-43 33 13' 8" 12' 8" e 11' 3" e 17' 7" e 15' 7" e 12' 5" e 13' 2" e 12' 3" e 10' 9" e 16' 5" e 14' 3" e 11' 7" e 12' 5" e 11' 5" e 9' 11" e 14' 8" e 12' 9" e 10' 5" e <br />600S250-54 50 14' 6" 13' 6" 12' 1" 19' 3" 17' 6" 14' 5" 14' 0" 13' 0" 11' 9" 18' 5" 16' 7" 13' 6" 13' 3" 12' 3" 11' 0" 17' 1" 14' 10" 12' 1" e600S250-68 50 15' 6" 14' 4" 12' 11" 20' 8" 18' 10" 16' 5" 15' 0" 13' 10" 12' 6" 19' 9" 18' 0" 15' 8" 14' 1" 13' 1" 11' 9" 18' 4" 16' 8" 14' 7" <br />800S137-33 33 9' 1" e 8' 5" e 7' 7" e 12' 10" e 11' 8" e 10' 1" e 8' 9" e 8' 1" e 7' 3" e 12' 4" e 11' 2" e 9' 6" e 8' 3" e 7' 8" e 6' 10" e 11' 5" e 10' 3" e 8' 8" e800S137-43 33 9' 10" 9' 2" 8' 3" e 14' 1" 12' 11" e 11' 4" e 9' 6" 8' 10" 7' 11" e 13' 7" e 12' 5" e 10' 10" e 9' 0" 8' 4" e 7' 6" e 12' 8" e 11' 7" e 10' 0" e800S137-54 50 10' 6" 9' 9" 8' 9" 15' 1" 14' 0" 12' 7" 10' 2" 9' 5" 8' 5" 14' 7" 13' 6" 12' 1" 9' 7" 8' 10" 8' 0" 13' 9" 12' 9" 11' 5" 800S137-68 50 11' 3" 10' 5" 9' 4" 16' 1" 14' 10" 13' 4" 10' 10" 10' 0" 9' 0" 15' 6" 14' 4" 12' 11" 10' 2" 9' 5" 8' 6" 14' 7" 13' 7" 12' 2" 800S162-33 33 10' 4" e 9' 7" e 8' 7" e 14' 5" e 13' 0" e 11' 1" e 10' 0" e 9' 3" e 8' 4" e 13' 9" e 12' 4" e 10' 5" e 9' 5" e 8' 9" e 7' 10" e 12' 8" e 11' 3" e 9' 5" e800S162-43 33 11' 3" 10' 5" 9' 4" e 15' 11" e 14' 7" e 12' 7" e 10' 11" 10' 1" e 9' 0" e 15' 4" e 13' 11" e 12' 0" e 10' 3" e 9' 6" e 8' 6" e 14' 3" e 12' 10" e 10' 11" e800S162-54 50 12' 0" 11' 1" 10' 0" 17' 3" 15' 11" 14' 3" 11' 7" 10' 9" 9' 8" 16' 8" 15' 5" 13' 9" 10' 11" 10' 1" 9' 1" 15' 8" 14' 6" 12' 11" e800S162-68 50 12' 9" 11' 10" 10' 7" 18' 4" 17' 0" 15' 4" 12' 4" 11' 5" 10' 3" 17' 8" 16' 5" 14' 9" 11' 7" 10' 9" 9' 8" 16' 8" 15' 6" 13' 11" <br />800S200-33 33 12' 2" e 11' 4" e 10' 3" e 16' 4" e 14' 6" e 12' 1" e 11' 10" e 11' 0" e 9' 10" e 15' 5" e 13' 6" e 11' 0" e 11' 2" e 10' 4" e 9' 2" e 13' 11" e 12' 1" e 9' 6" e <br />800S200-43 33 13' 1" 12' 2" e 10' 11" e 18' 8" e 16' 11" e 14' 2" e 12' 7" e 11' 9" e 10' 7" e 17' 10" e 16' 2" e 13' 3" e 11' 11" e 11' 1" e 10' 0" e 16' 6" e 14' 6" e 11' 10" e <br />800S200-54 50 13' 10" 12' 10" 11' 7" 20' 1" 18' 8" 16' 6" e 13' 5" 12' 5" 11' 2" 19' 5" 18' 0" 15' 5" e 12' 8" 11' 9" 10' 7" 18' 4" 16' 10" 13' 9" e800S200-68 50 14' 9" 13' 8" 12' 4" 21' 3" 19' 9" 17' 9" 14' 3" 13' 3" 11' 11" 20' 7" 19' 1" 17' 2" 13' 5" 12' 6" 11' 3" 19' 5" 18' 0" 16' 1" <br />"e" web stiffeners required at ends. <br />See Table Notes and figures on page 61. <br />Ceiling/Soffit Spans (S-Sections)