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SECTION 2 A TT ACHED & FREEST ANDING COVERS AND UTILITY SHEDS Table 2.2.1: Allowable Attributable Roof Area per Post for Carports, Patio Covers, and other Open Buildings - ALUMINUM POSTS Wind Load = Applied Load = Maximum Height Load in Lbs 1'-4" 2,064 8'-7" 1,548 9'-10" 1 ,204 11'-1" 903 Height Load in Lbs 8'-2" 2,736 9'-6" 2,502 10'-11" 1,596 12'-3" 1,197 Height Load in Lbs 8'-2" 3,408 9'-6" 2,556 10'-11" 1,988 12'-3" 1,491 Height Load In Lbs 10'-0" 2,381 11 '-8" 1 ,786 13'-4" 1 ,389 15'-0" 1 ,042 Height Load in Lbs 11 '-0" 3,600 12'-10" 2,700 14'-8" 2,100 16'-6" 1,575 Height Load in Lbs 11 '-1 0" 3,408 . 13'-10" 2,t)56 15'-10" 1,988 1 l' -10" 1 ,491 Aluminum Post . 1()2 MPH110'MPH -, '120MPHT125MPH . 140 MPH : 1 'tiH?q~n._~~Q!#.L~qJ:~.+_'23 #/Sq:Ft:t 26 JlISq~Ft.: 32 #/Sq. Ft. _~llow_~bl!.~oof Area in Square Feet for Various Loads on Post 2" x 2" x 0.044" Hollow Extrusion or 2" x 2" x 0.045" Sn.!}lExtru!iion;- Aluminum Alloy 6063 T-6 121 '-103 H__,_. 90 -.., 79 . . 65 91 77 67 60 48 71 60 52 46 38 53 45 39 35 28 2" x 3" X O.OSC" Hollow Extruslon'or 2" x3" x 0.045" Snap Extrusion; ~ Aluminum All016063 T-6 161 '137' ..r 'f19--~ -105 - 86 147 125 I f09 9Ef 78 94 80 69 61 50 70 60 52 46 37 3" x 2" x 0.010" HollowExtrusion - Aluminum Alloy 6663 T-6 200 ' rrO'-"'. . 148H .. 131 107 150 128 11 1 98 80 117 99 86 76 62 88 75 I -65 57 47 "3" x ~'i x C.04It. RofLForm'ed -A!.u_'!Illlum AII()l} 1 05 14-14 140 119 104 92 74 105 8978 .69 56 82 69 60 53 43 61 ...l", .,,5t. ,.. <15._ .. .,. 40 33 3" x3" x 0.060" Roll Formed - AluminumAlloy 3105 H-14 212 ..-;--18Cy---- '157-.H.. 138 113 159 135 '111 104 84 124 105 91 81 66 93 79 68 61 49 3" x 3" x O.060iiFlutedHollowExtrusion - Aluminum 6063 T-6 200 - 1"70 . 148'" 131 107 150 128 f11 98 80 1 17 99 86 76 62 88 75 65 57 47 Example: Find Roof Area Needed; Area = 'A'; Post Spacing ='S'; Structure Projection = 'W': A = S x (W/2 + OH.); If'S' = 1', W = 12', and O.H. = 2' then: 'Area' = 56 Sq. Ft. For a 10'-11" post and 120 m.p.h. wind load or 23 # / Sq. Ft. post choices are: 1) 2" x 3" Snap Section 2) All post sizes listed below the 2" x 3" Snap Section Where job conditions dictate a post height of 10' in a 120 MPH wind zone, a 3" x 3" Roll Formed COULD NOT BE used because when it is more than 10' tall it can only support 39 SF of roof On the other hand, a 3" x 3" Fluted Post with a post height of 10'- 7" can support an area of 128 square feet of area Thus, design must satisfy both height and area requirements. Lawrence E. Bennett, P.E. a\Il. fiifIGEBf - 1EVB.0Pr0SIT CONSU. T ANT P.O. BOX 4368, SOUTrt DAYTONA, FL 32121 TE1..EPHOl'oE (904) 767-04774 FAX (004) 767-6666 SEAL PAGE 52 @ COPYRIGHT 1997 NOT TO BE REPRODUCED N WHOlE OR N PART WIlliOUT TIE WRITTEN PERMSSlON Of' LAWRENCE E. BeH:TT, PE.