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SECTION 2 A TT ACHED & FREEST ANDING COVERS AND UTILITY SHEDS Wind Load = Applied Load = Maximum Table 2.2.1: Allowable Attributable Roof Area per Post for Carports, Patio Covers, and other Open Buildings - ALUMINUM POSTS Aluminum Post 102 MPH ! 110 MPH . 120 MPH r 125 illip~f [ '140 MPH 17 #/Sq. Ft,;20 #/~qJt. 123 t!!$g. FtJ~6 #/Sq.f(t!2 #/S9. Ft. Allowable Roof Area in Square Feet for Various Loads on Post 2" x 2" x 0.044" Hollow Extrusion or 121 103' 90 91 77 67 71 60 52 53 45 39 2" x 3" x 0.050" Hollow Extrusion or 161 137 119 105 86 147 125 109 96 78 94 80 69 61 50 70 60 52 46, 37 3" x 2" x 0.070" Hollow Extrusion - Aluminum Allo'y 6063 T-6 200 170 148' 131 . 107 150 128 111 98 80 117 99 86 76 62 88 ,75 65! 5L 47 3" x 3" x 0.040" Roll Formed - Aluminum Alloy 3105 H-14 140 . 119 I 104 ! 92' .. ., 1 05 89' 78 . 69 82 69 60 53 61 52 45 40 3" x 3" x 0.060" Roll Formed - Aluminum Alloy 3105 H-14 212 : 180 I 157 '138 113 159 ' 135 '117 1 04 84 124 105 91 81 66 93 79 68 61 49 3" x 3" x 0.060" Fluted Hollow Extrusion - Aluminum 6063 T-6 200 170 148 131 107 150 128 . 111 98 80 117 99 86 76 62 88 75 65 . 57 47 Height 7'-4" 8'-7" 9'-10" 11'-1" Height 8'-2" 9'-6" 10'-11" 12'-3" Heig,ht 8'-2" 9'-6" 10'-11" 12'-3" Height 10'-0" 11'-8" 13'-4" 15'-0" Height 11'-0" 12' -1 0" 14'-8" 16'-6" Height 11'-10" 13'-10" 15'-10" 17'-10" Load in Lbs 2,064 1,548 1,204 903 Load in Lbs 2,736 2,502 1,596 1,197 Load in Lbs 3,408 2,556 1,988 1,491 Load in Lbs 2,381 1,786 1,389 1,042 Load in Lbs 3,600 2,700 2,100 1,575 Load in Lbs 3,408 2,556 1,988 1,491 79 60 46 35 65 48 38 28 ..j 74 56 43 33 ---... Example: Find Roof Area Needed; Area = 'A'; Post Spacing ='S'; Structure Projection = 'W': A = S x (W/2 + O.H.); If'S' = 7', 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" x 0.044" Hollow Extrusion 2) All post sizes listed below the 2" x 3" x 0.044" Hollow Section Note: 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'- T' can support an area of 128 square feet of area. Thus, design must satisfy both height and area requirements. Lawrence E. Bennett, P.E. 011I. ENt3INEfER - DEVB.OPIEHT CONSU..TANT P.O. BOX 4368, SOUTH DAYTONA, FI.. 32121 TEl.EPHOIE (90<4) 787-4n4 FAX (90<4) 787-8558 SEAL PAGE 62 @ COPYRIGHT 1998 NOT TO BE REPRODUCED ,. WHOLE OR ,. PART WIl1iOUT Tl-E WRITTEN PERMSSlON OF LAWRENCE E. BENETT, P.E.