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<br />~ <br /> <br />L <br /> <br />SCREEN, VINYL, GLASS & MODULAR ROOMS SECTION 3 <br /> Table 3.2.1 Allowable Upright Heights, Chair Rail Spens or Header Spen. . Hollow Extrusions <br /> For Screen Room. or Vinyl Rooms I Open or Partially Enclo.ed Structure. <br /> Aluminum Alloy 6083 T-6 <br /> For 3 .econd wind gu.t at velocity of 120 MPH or an applied load of 14 iI'.q. ft.- <br /> Tributary Load Width W' · Purlln Spacing <br />Seellon. 3'-0"' I 3'-6" I 4'-0" 4'-6" I 5'-0" I 5'-6" 8'-0" 8'-6" I 7'-0" I 7'-6" <br /> Allowable Height 'H" bending 'b' or deflection 'cr <br /> 2" x 2" x 0.044" Hollow 7'-7" d 7'-2" d 8'-11" d 6'-6" b 6'-2" b 5'-11" b 5'-6" b 5'.5" b 5'-3" b 5'.1" b <br /> 2" x 2" x 0.055" Hollow 8'-0" d 7'-7" d 7'-4" d 7'-0" d 6'.9" b 6'.5" b 6'.2" b 5'.11" b 5'-8" b 5'-6" b <br /> 3" x 2" x 0.045" Hollow 8'-4" d 7'.11" d 7'.7" d 7'-4" d 7'.1" d 6'.10" b 6'-8" b 6'.3" b 6'-0" b 5'.10" b <br /> 2" x 3" x 0.045" Hollow 10'-5" d 9'.11" d 9'-6" d 9'.2" d 6'.10" d 6'-7" d 8'-4" d 7'.11" b 7'-8" b 7'.5" b <br /> 2" x 4" x 0.050" Hollow 14'.3" d 13'-4" b 12'-6" b 11'-9" b 11'.2" b 10'-8" b 10'-2" b 9' -9" ~ 9'-5" b 9'.1" b <br /> 2" x 5" x O.OSO" S.M.B. 19'.1" d 18'.2" d 17'-4" b 16'-4" b 15'-6" b 14'.9" b 14'.2" b 13'.7" b 13'.1" b 12'-8" b <br /> 2" x 8" x II.OSO" 8.M.B. 22'-4" d 21'.3" d 20'-0" b 18'-10" b 17'.11" b 17'-1" b 16'-4" b 15'-8" b 15'-2" b 14'.7" b <br /> - For Maximum hleghts at wind velocltle. other than 120 MPH,.ee Conversion Table 3B <br /> on the .peclflcatlon page for table. at the beginning of thl. .ectlon and example below. <br /> Note: <br /> For high velocity zones, convert to 130 MPH spans, <br /> Example: To calcualale maximum height 'H' at 140 MPH wind velocity for: <br />2" x 2" x 0.044" Hollow extrusion with Load Width = 4' <br />1. Find 'H' al120 MPH: H=6'.11" <br />2. Convert 'H' to decimal feet: H = 6'-11" = 6.92' <br />3, Select the appropriate multiplier from the conversion table 3A found on the <br />speclflcatlon sheet at the beginning of this section. <br />. if the height Is followed by 'b' use Bending multiplier, <br />- If Ihe height is followed by 'd' use Deflection mulllplier, <br />4, Multiply 'H' in decimal feet by appropriate multiplier. <br />'H' al140 MPH is 6,11' x 0.92 = 5,62' = 5'.7" <br /> Lawrence E. Bennett, P. E. <br /> CIVIL ENGINEER - DEVELOPMENT CONSUL TANT <br /> P,O. BOX 4368, SOUTH DAYTONA, Fl32121 <br /> TELEPHONE (388) 767-4774 <br /> FAX (388) 767~ <br /> SEAL <br />@ COPYRIGHT 2001 PAGE <br /> NOT TO BE REPRODUCED IN WHOLE OR IN PART WITHOU ,r: WRITTEN PERMISSION OF LAWRENCE E, BENNETT, P.E. 3-29 <br />