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SECTION 3 SCREEN, VINYL, GLASS & MODULAR ROOMS Table 3.2.2 Allowable Upright Heights, Chair Rail Spans or Header Spans _ Hollow Extrusions For Glass Rooms I Enclosed Structures Aluminum Alloy 6063 T -6 - For 3 second wind gust at velocity of 120 MPH or an applied load of 32 # I sq. ft.. Tributary Load Width W = Purl in Spacing. Sections 3'-0"' r 3'-6" r 4'-0" T 4'-6" T 5'-0" T 5'-6" r 6'-0" 6'-6" r 7'-0" r 7'-6" Allowable Hel ht 'H' I bending 'b' or deflection 'd' 2" x 2" x 0.044" Hollow 5'-3" b 4'-11" b 4'-7" b 4'-4" b 4'-1" b 3'-11" b 3'-9" b 3'-7" b 3'-5" b 3'-4" b 2- x 2" x 0.055" Hollow 5'-9" b 5'-4" b 4'-11" b 4'-8" b 4'-5" b 4'_3" b 4'-1" b 3'-11" b 3'-9" b 3'-8" b 3" x 2" x 0.045- Hollow 6'-1" b 5'-8" b 5'-3" b 4'-11" b 4'-9" b 4'-6" b 4'-4" b 4'-2" b 3'-11" b 3'-10" b 1" x 2" x 0.044- 7'-5" b 6'-11" b 6'-5" b 6'-1" b 5'-9" b 5'-6" b 5'-3" b 5'-1" b 4'-10" b 4'-8" b to 2" x 2" x existing ** 2" x 3" x 0.045" Hollow 7'-9" b 7'-2" b 6'-9" b 6'-4" b 6'-0" b 5'-9" b 5'-6" b 5'-3" b 5'-1" b 4'-11" b 2- x 2" x 0.044" 8'-1" b 7'-6" b 6'-11" b 6'-7" b 6'-3" b 5'-11" b 5'-8" b 5'-6" b 5'-3" b 5'-1" b with 1- x 2" x 0.040- Snap Cap attached ** 2" x 2" x 0.044" 8'-3" d 7'-10" d 7'-6" d 7'-2" b 6'-9" b 6'-5" b 6'-2" b 5'-11" b 5'-9" b 5'_6" b to 2- x 2" x Existing ** 2" x 4" x 0.050" Hollow 9'-6" b 8'-10" b 8'-3" b 7'-9" b 7'-5" b 7'-0" b 6'-9" b 6'-6" b 6'-3" b 6'-0" b 2" x 5" x 0.050" S.M.B. 13'-3" b 12'-3" b 11'-6" b 10'-10" b 10'-3" b 9'-9" b 9'-4" b 8'-11" b 8'-8" b 8'-4" b 2" x 6" x 0.050" 8.M.B. 15'-3" b 14'-2" b 13'-3" b 12'-6" b 11'-10"b 11'-3" b 10'-10" b 10'-5" b 10'-0" b 9'-8" b . For Maximum hieghts at wind velocities other than 120 MPH, see Conversion Table 38 on the specification page for tables at the beginning of this section and example below, .. See page 3-6 for connection details for 1 x 2 and 2 x 2 to existing 2 x 2, Snap Cap 'snaps' into screw bosses, Therefore, no fasteners are required for connection of Snap Cap to existing 2 x 2, Note: 1, For high velocity zones convert to 130 MPH spans, See page 3-6 for connection details for 1 x 2 and 2 x 2 to existing 2 x 2, Snap Cap 'snaps' into screw bosses, Therefore, no fasteners are required for connection of Snap Cap to existing 2 x 2, Example: To calcualate maximum height 'H' at 140 MPH wind velocity for: 2" x 2" x 0.044" Hollow Extrusion with Load Width = 4' 1, Find 'H' at 120 MPH: H = 4'-7" 2, Convert 'H' to decimal feet: H = 4'-7" = 4.58' 3, Select the appropriate multiplier from the conversion table 38 found on the specification sheet at the beginning of this section, - if the height is followed by 'b' use Bending multiplier, - if the height is followed by 'd' use Deflection multiplier, 4, Multiply 'H' in decimal feet by appropriate multiplier. 'H' at 140 MPH is 4.58' x 0.86 = 3.94' = 3'-11" (p" 'j 1(,& / X /,,67 7. '5 3 7' , SEAL Lawrence E. Bennett, P.E. CIVIL ENGINEER - DEVELOPMENT CONSUL TANT P,O, BOX 4368, SOUTH DAYTONA, FL 32121 TELEPHONE (386) 767-4774 FAX (386) 767~556 PAGE 3-30 @ COPYRIGHT 2001 NOT TO BE REPRODUCED IN WHOLE OR IN PART WITHOUT THE WRITTEN PERMISSION OF LAWRENCE E, BENNETT, p,e,