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<br />~ <br /> <br />~ <br /> <br /> > <br /> SCREEN, VINYL, GLASS & MODULAR ROOMS SECTION 3 <br /> Table 3.2.1 Allowable Upright Heights, Chair Rail Spans or Header Spans - Hollow Extrusions <br /> For Screen Rooms or Vinyl Rooms I Open or Partially Enclosed Structures <br /> Aluminum Alloy 8083 T-8 <br /> For 3 second wind aust at velocity of 120 MPH or an applied load of 1.. # Isa, ft.. <br /> Trlbutarv Load Width OW' . Purlln SDaclna <br /> Sections 3'.0"' I 3'-8" I ....0" I "'-8" I 5'.0" I 5'-8"1 8'.0" I 8'-8" I 7'.0" T 7'-8" <br /> Allowable HeIGht 'H' I bendinG 'b' or deflection 'd' <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'-8" b 5'-5" b 5'-3. b 5'-1" b <br /> 2" x 2" x 0.055" Hollow 8'..()" d 7'-T' d 1'-4" d 7'..()" 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 1'-7" d 1'-4" d 7'-1" d 6'-10" b 6'-6" b 6'-3" b 6'..()" b 5'-10" b <br /> 2" x 3" x 0.045" Hollow 10'-5" d 9'-11" d 9'-6" d 9'-2" d 8'-10" d 8'-7" d 8'-4" d 1'-11" b 7'-8. b 7'-5. b <br /> 2" x .." 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 0.050" S,M.8. 19'-1" d 18'-2" d 11'-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 Q.OSO" S,M,8, 22'-4. d 21'-3. d 20'..(). 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 velocities other than 120 MPH, s.. Conversion Table 38 <br /> on the specification page for table. at the beginning of this .ectlon and example below. <br /> Note: <br /> For high velocity zones, convert to 130 MPH spans, <br /> Example: To calcualata 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' at 120 MPH: H = 6'-11" <br /> 20 Convert 'H' to decimal feet: H = 6'-11" = 6092' <br /> 30 Select the appropriate multiplier from the conversion table 3A found on the <br /> specification sheet at the beginning of this section, <br /> - if the height Is followed by 'b' use Bending multiplier, <br /> - If the height is followed by 'd' use Detleclion multiplier. <br /> 4, Multiply 'H' in decimal feet by appropriale multiplier, <br /> 'H' at 140 MPH is 6011' x 0,92 = 5,62' = 5'-7. <br /> II 0 Vl-'\-ph.. <br /> {p '-ll'l ;:::- (p.ql X- I.Og - 7.1& o~ 7'-5.511 <br /> - <br /> u.pr~kt- he;jtJ- <br /> Lawrence E. Bennett, P, E. <br /> CIVIL ENGINEER - DEVELOPMENT CONSUL TANT <br /> P,O, BOX 4368, SOUTH DAYTONA, FL 32121 <br /> TELEPHONE (388) 787-4714 <br /> FAX(388)787~ <br /> SEAL <br />@ PAGE <br />COPYRIGHT 2001 <br /> NOT TO BE REPRODUCED IN WHOLE OR IN PART WITHOU i: WRITTEN PERMISSION OF LAWRENCE E, BENNETT. P,E, 3-29 <br />