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. SECTION 2 ATTACHED & FREESTANDING COVERS AND UTILITY SHEDS _F.1i1~"'''. Allowable Attributable Roof Area per Post for Carports, Patio Covers, and other Open Buildings - ALUMINUM POSTS Aluminum Post Wind Load = 102 MPH I 110 MPH I 120 MPH I 125 MPH I 140 MPH Aiiiiiied Load = 17 #lSii. Ft. T 20 #lSa. Ft. I 23 #lSa. Ft. I 26 #lSa. Ft. I 32 #lSa~ Ft. Maximum Allowable Roof Area in Sauare Feet for Various Loads on Post HelQ'ht Load in Lbs 2" x 2" x 0.044" Hollow Extrusion or 7'.4" 2,064 121 103 90 79 65 8'.7" 1,548 91 77 67 60 48 9'-10" 1,204 71 60 52 46 38 11'.1" 903 53 45 39 35 28 Heiaht Load in Lbs 2" x 3" x 0.050" Hollow Extrusion or 8'-2" 2,736 161 137 119 105 86 9'.6" 2,502 147 125 109 96 78 10'.11" 1,596 94 80 69 61 50 12'.3" 1,197 70 60 52 46 37 Heiaht Load in Lbs 3" x 2" x 0.070" Hollow Extrusion - Aluminum Alloy 6063 T-6 8'-2" 3,408 200 170 I 148 I 131 107 9'-6" 2,556 150 128 I 111 I 98 80 10'-11" 1,988 117 99 : 76 62 12'.3" 1,491 88 75 I 65 r 57 47 He1Qht Load in Lbs 3" x 3" x 0.040" Roll Formed - Aluminum AllovJ105 H-14 10'-0" 2,381 140 119 104 92 74 11'-8" 1,786 105 89 78 69 56 13'-4" 1,389 82 69 60 53 43 15'-0" 1,042 61 52 45 40 33 Heiaht Load in Lbs 3" x 3" x 0.060" Roll Formed - Aluminum Alloy 3105 H-14 11'-0" 3,600 212 180 157 138 113 12'.10" 2,700 159 135 117 104 84 14'.8" 2,100 124 105 91 81 66 16'-6" 1,575 93 ~ 79 68 61 49 Heiaht Load in Lbs 3" x 3" x 0.060" Fluted Hollow Extrusion - Aluminum 6063 T.6 11'.10" 3.408 200 170 148 131 107 13'.10" 2,556 150 128 111 98 80 15'.10" 1,988 117 99 86 76 62 17'-10" 1.491 88 75 65 57 47 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. Fl. For a 10'.11" post and 120 m,p.h. wind load or 23 # / Sq. Fl. post choices are: :'. 1) 2" x 3" x 0,050" Hollow Extrusion 2) All post sizes listed below the 2" x 3" x 0.044" Hollow Section Note: Where jab 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. SEAL Lawrence E. Bennett, P.E. CIVIL ENGINEER. DEVELOPMENT CONSUL TANT P.O, BOX 4368, SOUTH DAYTONA, FL 32121 TELEPHONE (904) 767-4774 FAX (904) 767.6556 PAGE 70 @ COPYRIGHT 1999 NOT TO BE REPRODUCED IN WHOLE OR IN PART WITHOUT THE WRITTEN PERMISSION OF LAWRENCE E. BENNETT, P.E.