Laserfiche WebLink
<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 8063 T-6 <br /> For 3 second wind gust at velocity of 120 MPH or an applied load of 14 iI/.q. fl" <br /> Tributary Load Width W · Puriln Spacing <br /> Sections 3'.0-' 3'-6- I 4'.0- I 4'-6- I 5'.0- 5'-6- 6' .0- 6'-6- I 7'.0- I 7'-6- <br /> Allowable Height 'H' / bending 'b' or deflection 'd' <br /> r x 2- x 0.044- Hollow 7'-r d 7'-2" d 6'.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'-0" d 7'-7" d 7''''" 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''''" d 7'-11" d 7'-7" d 7''''" d 7'-1" d 6'-10" b 6'-6. b 6'-3. b 6'-0" b 5'-10. b <br /> r x 3- x 0.045" Hollow 10'-5" d 9'-11" d ~~ 9'-2" d 8'-10" d 8'.7. d 8''''. d 7'-11. b 7'-8" b 7'-5" b <br /> 2- x 4- x 0,050- Hollow 14'-3" d 13''''" b 11'-9. b 11 '-2" b 10'-8" b 10'-2. b 9'-9. b 9'-5" b 9'-1. b <br /> 2- x 5- x 0.050- S.M.B. 19'-1" d 18'-2" d 17''''" b 16''''" b 15'-6" b 14'-9" b 14'-2" b 13'-7" b 13'-1" b 12'-8" b <br /> r x 6- x 0.050- S,M,B, 22''''" d 21'-3" d 20'-0" b 18'-10" b 17'-11"b 17'-1" b 16''''" b 15'-8" b 15'-2. b 14'-7" b <br /> , For Maximum hleghts at wind velocltle. other than 120 MPH,... 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 calcualate 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 /> 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 /> 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 Deflection multiplier. <br /> 4 Multiply 'H' in decimal feet by appropriate multiplier. <br /> 'H' at 140 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, SOUTli DAYTONA. Fl 32121 <br /> TELEPHONE (386) 787~774 <br /> FAX (386) 787-M58 <br /> SEAL <br /> PAGE <br />@ COPYRIGHT 2001 <br /> ....OT TO BE REPRODUCED IN WHOLE OR IN P"RT WITHOUT THE WRITTEN PERMISSION OF LAWRENCE E. BENNETT, P.E 3-29 <br />