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7.0 CONCRETE FOOTING OPTIONS <br />EQUIVALENT FOOTINGS FOR <br />FREESTAND AND ATTACHED <br />o DIAMETER OF <br />0- W CIRCULARLUZ 12 <br />E D j = FOOTINGS (IN) <br /><e ,-e <br /> z 0 z 12" 18"24" <br />1-C ZE <br />08 96 <br />DEPTH OF <br />O- 0 CIRCULAR <br />Z <br />FOOTINGS (IN) <br />14"17"24"14"14" <br />15"18"30"15"15" <br />16"19"36"16"16" <br />17"21"43"19"17" <br />18"22"52"23"18" <br />19"23"61"27"19" <br />20"24"n/a 31"20" <br />21"26"n/a 36"21" <br />22"27"n/a 42"24" <br />23"28"n/a 48"27" <br />24"30"n/a 54"31" <br />25"31"n/a 61"35" <br />26"32"n/a 69"39" <br />27"34"n/a 77"44" <br />28"35"n/a 86"49" <br />29"36"n/a n/a 54" <br />30"38"n/a n/a 60" <br />31"39"n/a n/a 66" <br />32"40"n/a n/a 72" <br />33"42"n/a n/a 79" <br />34"43"n/a n/a 87" <br />TABLE 7.8 <br />Carl Putnam, P. E. <br />3441 Ivylink Place <br />Lynchburg, VA 24503 <br />CONVERSION TO SQUARE TOP FOOTING <br />For Single Span Attached <br />Footings Only <br />Footing Depth <br />18"24"30"36" <br />d (in) Required Side of Square Footing <br />20"21"18"16"15" <br />21"23"20"18"16" <br />22"24"21"19"17" <br />23"26"23"20"18" <br />24"28"24"21"20" <br />25"29"26"23"21" <br />26"31"27"24"22" <br />27"33"29"26"23" <br />28"35"30"27"25" <br />29"37"32"29"26" <br />30"39"34"30"27" <br />31"41"35"32"29" <br />32"43"37"33"30" <br />33"45"39"35"32" <br />34"47"40"36"33" <br />35"49"42"38"35" <br />36"51"44"39"36" <br />37"53"46"41"38" <br />38"55"48"43"39" <br />39"57"50"44"41" <br />40"60"52"46"42" <br />41"N/A 54"48"44" <br />42"N/A 56"50"45" <br />43"N/A 58"51"47" <br />44"N/A 60"53"49" <br />45"N/A N/A 55"50" <br />46"N/A N/A 57"52" <br />47"NA N/A 59"54" <br />48"N/A N/A N/A 55" <br />49"N/A N/A N/A 57" <br />50"N/A N/A N/A 59" <br />TABLE 7.9 <br />SITE SPECIFIC FOOTING TABLE <br />for SINGLE SPAN Attached Structures <br />Wind Condition Lattice <br />Trib 90 mph 90 mph |110 mph Trib <br />Area Exp B Exp C Exp C Area <br />(sq ft) Required "d" of Footing (in)(sq ft) <br />15 15"17"20" 25 <br />20 17"19"21" 33 <br />25 18"20"23" 42 <br />30 19"21"25" 50 <br />35 20"23"26" 58 <br />40 21"24"27" 67 <br />45 22"25"28" 75 <br />50, 23"25"29" 83 <br />55 23"26"30" 92 <br />60 24"27"31"100 <br />65 25"28"32"108 <br />70 25"28"33"117 <br />80 26"30"34"133 <br />90 27"31"35"150 <br />100 28"32"37"167 <br />110 29"33"38"183 <br />120 30"34"39"200 <br />130 31"35"40"217 <br />140 32"36"41"233 <br />150 33"37"42"250 <br />160 33"37"43"267 <br />170 34"38"44"283 <br />180 35"39"45"300 <br />190 35"40"45"317 <br />200 36"40"46"333 <br />210 36"41"47"350 <br />220 37"42"48"367 <br />230 38" <br />240 38" <br />TABLE 7.10 <br />5555555.......555555555Existing Residenc€ <br />AA <br />PaneISpan 1/2 OF PANEL SPAN <br />" <br />8 a1 1 <br />Corner Trib Area | Trib Area for | 1/2 OF PANEL SPAN <br /> Middle Post <br />1 1 <br />/6 /3:.0 <br />1 Post Spacing Panel <br />'1 i .Overhang <br />Figure 1 <br />Determine Trib Area from Figure 1 <br />INSTRUCTIONS TO USE TABLE 7.10 <br />1. TABLE IS FOR SINGLE SPAN ATTACHED UNITS ONLY <br />2. DETERMINE ACTUAL TRIBUTARY AREA <br />FOR MIDDLE POSTS THIS IS: <br />TRIB WIDTH x POST SPACING <br />FOR END POSTS THIS IS: <br />(OVERHANG+ HALF OF POST SPACING) x TRIB WIDTH <br />3. DETERMINE FOOTING SIZE FOR WIND CONDITION <br />4. FOR LATTICE USE LAST COLUMN FOR TRIB AREA <br />Amerimax Building Products ,/*E5208 Tennyson Parkway /90*Plano, Texas 75024 <br />AL\Fc??*'M4-2009 <br />20 2011 <br />OV 5 2012 <br />42"48"383 <br />43"49"400 (it6 <br />OCT <br />\ lt <br />V V /-7 <br />1 1 SzbP'N <br />IN . <br />04015 <br />ICC ESR 1398 (2009 IBC) 10/11/2011 Page 56 of 60 #es-936 120 <br />D