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<br />SECTION 2
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<br />SEAL
<br />PAGE
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<br />70
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<br />ATTACHED & FREESTANDING COVERS AND UTILITY SHEDS
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<br />_li1n~...... Allowable Attributable Roof Area per Post for Carports,
<br />Patio Covers, and other Open Buildings - ALUMINUM POSTS
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<br /> Aluminum Post
<br />Wind Load = 102 MPH I 110 MPH I 120 MPH I 125 MPH I 140 MPH
<br />ADD lied Load = 17 #/So, Ft. I 20 #/So. Ft. I 23 #/So, Ft. I i6 #/So, Ft. I 32 #/5a-:-Ft.
<br />Maximum Allowable Roof Area in Souare Feet for Various Loads on Post
<br />Heioht Load in Lbs 2" x 2" x 0,044" Hollow Extrusion or
<br />7'-4" 2,064 121 103 90 79 65
<br />8'-7" 1,548 91 77 67 60 48
<br />9'.10" 1,204 71 60 52 46 38
<br />11'.1" 903 53 45 39 35 28
<br />Heiaht Load in Lbs 2" x 3" x 0,050" Hollow Extrusion or
<br />8'.2" 2,736 161 137 119 105 86
<br />9'-6" 2,502 147 125 109 96 78
<br />10'-11" 1,596 94 80 69 61 50
<br />12'.3" 1,197 70 60 52 46 37
<br />HeiQht Load in Lbs 3" x 2" x 0.070" Hollow Extrusion - Aluminum Alloy 6063 T-6
<br />8'-2" 3,408 200 170 I 148 I 131 107
<br />9'-6" 2,556 150 128 I 111 I 98 80
<br />10'-11" 1,988 117 99 76 62
<br />12'.3" 1,491 88 75 I 65 I 57 47
<br />Heiaht Load in Lbs 3" x 3" x 0,040" Roll Formed. Aluminum Alloy 3105 H-14
<br />10'.0" 2,381 140 119 104 92 74
<br />11'.8" 1,786 105 89 78 69 56
<br />13'-4" 1,389 82 69 60 53 43
<br />15'-0" 1,042 61 52 45 40 33
<br />Heioht Load in Lbs 3" x 3" x 0,060" Roll Formed. Aluminum Alloy 3105 H.14
<br />11'-0" 3,600 212 180 157 138 113
<br />12'-10" 2,700 159 135 117 104 84
<br />14'.8" 2,100 124 105 91 81 66
<br />16'-6" 1,575 93 79 68 61 49
<br />Heiaht Load in Lbs 3" x 3" x 0,060" Fluted Hollow Extrusion. Aluminum 6063 T.6
<br />11'-10" 3,408 200 170 148 131 107
<br />13'.10" 2,556 150 128 111 98 80
<br />15'-10" 1,988 117 99 86 76 62
<br />17'.10" 1,491 88 75 65 57 47
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<br />Example:
<br />Find Roof Area Needed; Area = 'A'; Post Spacing ='5'; Structufe Projection = 'W:
<br />A = S x (W/2 + O.H.); If '5' = 7', W = 12', and O.H = 2' then: 'Area' = 56 Sq, Fl.
<br />For a 10'.11" post and 120 m.p.h. wind load or 23 # I Sq. Fl. post choices are;
<br />1) 2" x 3" x 0.050" Hollow Extfusion
<br />2) All post sizes listed below the 2" x 3" x 0.044" Hollow Section
<br />Note:
<br />Where job conditions dictate a post height of 10' in a 120 MPH wind zone, a 3" x 3" Roll Formed COULD NOT
<br />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
<br />Post with a post height of 10'- 7" can support an area of 128 square feet of area Thus, design must satisfy both
<br />height and area requirements
<br />
<br />Lawrence E. Bennett, P.E.
<br />CIVIL ENGINEER. DEVELOPMENT CONSUL TANT
<br />P.O. BOX 4368, SOUTH DAYTONA, FL 32121
<br />TELEPHONE (904) 767-4774
<br />FAX (904) 767.6556
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<br />@ COPYRIGHT 1999
<br />NOT TO BE REPRODUCED IN WHOLE OR IN PART WITHOUT THE WRITTEN PERMISSION OF LAWRENCE E BENNETT, PE
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