Laserfiche WebLink
<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 6063 T-6 <br /> For 3 second wind gust at velocitY of 120 MPH or an aDDlled load of 14 "/sa. fl" <br /> Tributary Load Width W · Puriln Spacing <br /> Sections 3'-0"' T 3'-6" 4'-0" 4'-6" 5'-0- I 5'-6" I 6'-0" I 6'-8" I 7'-0" T 7'-8" <br /> Allowable Helaht 'H' I bendlna 'b' or deflection 'd' <br /> 2" x 2" x 0.044" Hollow 7'-7' 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'-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'-6" b 6'-3" b 6'-0" b 5'-10" b <br /> 2" x 3" x 0.045" Hollow 10'-5" d 9'-11" d g'-6" d 9'-2" d 8'-10" d 8'-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 g'.g" b 9'-5" b 9'-1" b <br /> 2" x 5" x 0.050" S.M.8. 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 6" x 0.050" S.M.8, 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 hieghts at wind velocities other than 120 MPH, see Conversion Table 38 <br /> on the specification page for tables at the beginning of this section 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, SOUTH DAYTONA, FL 32121 <br /> TELEPHONE (366) 767-4774 <br /> FAX (366) 767-6556 <br /> SEAL <br />@ PAGE <br />COPYRIGHT 2001 <br /> NOT TO BE REPRODUCED IN WHOLE OR IN PART WITHOUT THE WRITTEN PERMISSION OF LAWRENCE E. BENNETT. P.E. 3-29 <br />