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SCREEN, VINYL, GLASS & MODULAR ROOMS SECTION 3 Table 3.1.1 Allowable Edge Beam Spans - Hollow Extrusions For Screen Rooms or Vinyl Rooms I Open or Partially Enclosed Structures Aluminum Alloy 6063 T-6 L- For 3 second wind gust at velocity of 120 MPH or an applied load of 28" 'sq. ft. * 2" x 2" x 0.044" 2" x 2" x 0.055" Load Max. Span 'L' , (bending 'b' or deflection 'd') Load Max. Span 'L' , (bending 'b' or deflection 'd') Width (ft.) 1 & 2 Spar 3 Span 4 Span Max. Width (ft.) 1 & 2 Spa~ 3 Span 4 Span Max. Cantilever Cantilever 5 3'-9" d 4'-4" b 4'-3" b 1'.0" d 5 4'-0" d 4'.9" b 4'.7" b 1'-1" d 6 3'.7" d 3'.11" b 3'.10" b 0'.11 " d 6 3'-9" d 4'-4" b 4'-2" b 1'-0" d 7 3'-4" b 3'-S" b 3'-7" b 0'-11" d 7 3'-7" d 4'-0" b 3'-11" b 0'.11" d 8 3'-1" b 3'-5" b 3'-4" b 0'-10" d 8 3'-4" b 3'-9" b 3'.S" b 0'-11" d 9 2'-11" b 3'-3" b 3'-2" b 0'-10" d 9 3'.2" b 3'-7" b 3'-5" b 0'-11" d 10 2'-9" b 3'-1" b 2'-11" b 0'-10" d 10 3'-0" b 3'-4" b 3'.3" b 0'.10" d 11 2'-S" b 2'-11" b 2'-10" b 0'.9" d 11 2'-10" b 3'-3" b 3'-1" b 0'-10" d 12 2'-6" b 2'-10" b 2'.9" b 0'.9" d 12 2'-9" b 3'-1" b 2'-11" b 0'-10" d 3" x 2" x 0.045" 2" x 3" x 0.045" Load Max. Span 'L" (bending 'b' or deflection 'd') Load Max. Span 'L" (bending 'b' or deflection 'd') Width (ft.) 1 & 2 Span 3 Span 4 Span Max. Width (ft.) 1 & 2 Spa~ 3 Span 4 Span Max. Cantilever Cantilever 5 4'.2" d 5'-1" b 4'.11" b 1'-1" d 5 5'.3" d 6'.5" b 6'-3" b 1'-5" d 6 3'-11" d 4'-7" b 4'-5" b 1'-1" d 6 4'-11" d 5'-11" b 5'.S" b 1'-4" d 7 3'-9" d 4'-3" b 4'-2" b 0'.11" d 7 4'-S" d 5'-5" b 5'-3" b 1'.3" d 8 3'-7" d 3'-11" b 3'-10" b 0'-11" d 8 4'-6" d 5'-1" b 4'.11" b 1'-2" d 9 3'-4" b 3'.9" b 3'-S" b 0'-11" d 9 4'-3" b 4'-10" b 4'.S" b 1'-2" d 10 3'-2" b 3'.7" b 3'.5" b 0'-11" d 10 4'.1" b 4'-7" b 4'-5" b 1'-1" d 11 3'-1" b 3'-5" b 3'-4" b 0'-10" d 11 3'-11" b 4'-4" b 4'.2" b 1'.1" d 12 2'.11" b 3'-3" b 3'-2" b 0'-10" d 12 3'.9" b 4'.2" b 4'.0" b 1'-1" d 2" x 4" x 0.050" Load Max. Span 'L' , (bending 'b' or deflection 'd') Width (ft.) 1 & 2 Spa~ 3 Span 4 Span Max. Cantilever 5 7'-1" b 7'-11" b 7'-7" b 1'-11" d 6 6'.5" b 7'-2" b 6'-11" b 1'-9" d 7 5'-11" b 6'-S" b 6'-5" b 1'-S" d 8 5'-7" b 6'-3" b 6'.0" b 1'-7" d 9 5'-3" b 5'-11" b 5'-S" b 1'.7" d 10 4'"11" b 5'.7" b 5'.5" b 1'-6" d 11 4'.9" b 5'-4" b 5'-2" b 1'.6" d 12 4'-7" b 5'-1" b 4'-11 " b 1'-5" d " For Maximum Spans at wind velocities other than 120 MPH, see conversion tables on the spec-jfication page for tables at the beginning of this section and example below. Notes: 1. For high velocity zones, convert to 130 MPH spans, 2. Above spans do not Include length of knee brace. Add horizontal length of knee brace to above spans for total beam spans. Example: To calcualate maximum span 'L' at 140 MPH wind velocity for: 2" x 4" x 0.050" hollow section with Load Width = 65' and 4 span Overhang Condition 1. Find 'L' at 120 MPH: L = 6'-11" 2, Convert 'L' to decimal feet: L = 6'-11" = 6.92' 3. Select the appropriate multiplier from the conversion table found on the specification sheet at the beginning of this section. - if the spant Is followed by 'b' use Bending multiplier, . If the span is followed by 'd' use Deflection multiplier. 4. Multiply 'L' in decimal feet by appropriate multiplier. 'L' at 140 MPH is 6,92' x O,S7 = 5.45' = 5'-5" L Lawrence E. Bennett, P. E. CIVIL ENGINEER - DEVELOPMENT CONSUL TANT P,O, BOX "368, SOUTH DAYTONA, FL 32121 TELEPHONE (386) 767.....77.. FAX (386) 767-6556 SEAL @ COPYRIGHT 2001 NOT TO BE REPRODUCED IN WHOLE OR IN PART WITHO' HE WRITTEN PERMISSION OF LAWRENCE E, BENNETT, P,E, PAGE 3-25