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<br />SECTION 2
<br />
<br />A TT ACHED & FREEST ANDING COVERS AND UTILITY SHEDS
<br />
<br />Table 2.2.1: Allowable Attributable Roof Area per Post for Carports,
<br />Patio Covers, and other Open Buildings - ALUMINUM POSTS
<br />
<br />Aluminum Post
<br />102f,fPH----f11fMPH--; 12l'fMPH 125 MPH 140 MPH
<br />I'-#/S~Ft.~=-20 #/SciFt.-T 23 #/Sq.-Ft:~-26#7s~.Ft. ..,32 #/Sq, Ft.
<br />___~lIowable Roof Area in Square Feet fo!_Y~rious Loads on Post
<br />2" x 2" x 0,044" Hollow Extrusion or
<br />2"!~.. x O))~_~.. ~E~Extr_l!~ionL~nAJl!!llJrlUm J\Jloy 6063 T-6
<br />2,064 121 103 90 79 65
<br />1,548 91 77 67 60 48
<br />1,204 71 60 52 46 38
<br />903 53 -45- '"-~ '.-39- 35 28
<br />Load in Lbs2"x-3"x-O,050" Hollow-Extrusion or--~-
<br />2" x 3" x 0,045" Snap Extrusion; - Aluminum Allo}'6063 T-6
<br />,n =-=161____I___137 ----L--- 119 _____-+- ~ -105-- 86
<br />147 : 125 I 109 : 96 78
<br />-- - 94-- ,- -----80-----'--- 69------' 61 50
<br />70 --60 '52 46 37
<br />3" x 2" iO.070" HOllowE-Xtrusiol1 ~ Aluminum Alloy 6063 T-6
<br />. - too --Tton- --TU-- '148 '.- 131 107
<br />_n... ____,_ __ ,1. _ , u_ .._
<br />150 128 111 98 80
<br />11'7 -- - -99- +- 86 - 76 62
<br />88 75 -65 57 47
<br />3" x 3" x 0.040" Ron Formed - Aluminum Alia}' 3105 H-14
<br />140 i- --n'9 '-,- - -104-'- --92. .
<br />His . 89 ' -78- 69
<br />82- - --69 60 -.. n._"_ -+. 53
<br />61 :- -"5"2 45 ~ 40
<br />:_ j"X 'j~j().Q~_<r~'_ RoI!.F~r!lied -~1~!!!inu~An()i'31 05 H-14
<br />212 · 180 157 138 113
<br />__159~___1~___:-f~u___~__Jf7~_ ___':':'1Q4 84
<br />124 ! 105 91 81 66
<br />'-93 '
<br />
<br />Wind Load =
<br />Applied Load =
<br />Maximum
<br />Height Load in L-bs
<br />
<br />7'-4"
<br />8-7"
<br />9'-10"
<br />11' -1 "
<br />Height
<br />
<br />8'-2"
<br />9'-6"
<br />10'-11"
<br />12'-3"
<br />Height
<br />8'-2"
<br />9'-6"
<br />10' -11"
<br />12'-3"
<br />Height
<br />1 0'-0"
<br />11' -8"
<br />13'-4"
<br />15'-0"
<br />Height
<br />11 '-0"
<br />12'-10"
<br />14'-8"
<br />16'-6"
<br />Height
<br />
<br />,'~
<br />15'-10"
<br />17'-10"
<br />
<br />
<br />2, ?3€r
<br />2-,502
<br />1,596 -
<br />1,197
<br />Load in Lbs
<br />3.408
<br />2,556
<br />1,988
<br />1.491
<br />Load In Lbs
<br />2,381
<br />1,786
<br />1,389
<br />1 ,042
<br />Load In Lbs
<br />3,600
<br />2,1M
<br />2,1M
<br />1,575
<br />
<br />2,556
<br />1 ~988-
<br />1,491
<br />
<br />74
<br />56
<br />43
<br />33
<br />
<br />r- -
<br />
<br />150
<br />rrr'
<br />131r
<br />
<br />-.-~... . .. '.'-'--.'-
<br />170 . '.' 131
<br />I 128' , .' ...... .'., -98
<br />t - ,." -.---- ->"., u~_n+ --
<br />,99 86 I 76
<br />t---yS--- - .'65- - --, 57
<br />
<br />Example:
<br />Find Roof Area Needed; Area = 'A'; Post Spacing ='S'; Structure Projection = 'W':
<br />A = S x (W/2 + OH.), If'S' = 1', W = 12', and OH. = 2' then: 'Area' = 56 Sq Ft.
<br />For a 10'-11" post and 120 m,p.h. wind load or 23 # 1 Sq. Ft. post choices are:
<br />1) 2" x 3" Snap Section
<br />2) All post sizes listed below the 2" x 3" Snap Section
<br />
<br />Where job conditions dictate a post height of 10' in a 120 MPH wind zone, a 3" x 3" Roll Formed
<br />COULD NOT BE used because when it is more than 10' tall it can only support 39 SF of roof On the
<br />other hand, a 3" x 3" Fluted Post with a post height of 10'- 7" can support an area of 128 square feet of
<br />area. Thus, design must satisfy both height and area requirements.
<br />
<br />Lawrence E. Bennett, P.E,
<br />a\Il. ~ - OEYB..ClPI:EN'T COHI!lU. T ANT
<br />P,O. BOX 4368, SOUTH DAYTONA. FL 32121
<br />TEI..EF'H()toE (904) ttn - 4 n 4
<br />FAX (904) 767-8666
<br />
<br />SEAl..
<br />
<br />PAOE
<br />
<br />52
<br />
<br />@ COPYRIGHT 1997
<br />NOT TO BE REPROOUCED N WHOlE OR N PART WITHOlIT TIE WRITTEN PERIItSSlON OF LAWRENCE E. ElEJIIoETT, PE.
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