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MAXIMUM ROOF BEAM SPANS IN DECIMAL FEET SCREEN ROOF / SCREEN WAllS EXAMPLE: WIND 110 MPH DEFLECTION Ll60 POOL ENCLOSURE < -------1 COLUMN USED 1------------ > 8 'WAll ROOF (F) (G) (H) (I) (J) (K) (l) (M) (N) BEAM SPACING 2x3 2x3 2x4 2x4 2x4 2x6 2x7 2x8 2x9 USED PB SMS PB SMS 5MB 5MB 5MB 5MB 5MB 4'-0' 18.42 19.08 19.25 19.25 19.25 19.25 19.25 19.25 19.25 (H) 5'-0' 17.08 17.58 17.75 17.75 17.75 17.75 17.75 17.75 17.75 2x4 6'-0' 16.08 16.58 16.75 16.58 16.75 16.75 16.75 16.75 16.75 PB 7'-0' 15.25 15.58 15.75 15.75 15.75 15.75 15.75 15.75 15.75 8'-0' 14.58 14.92 15.08 15.08 15.08 15.08 15.08 15.08 15.08 9'.0' 13.92 14.42 14.42 14.42 14.42 14.42 14.42 14.42 14.42 4'-0' 21.08 21.75 21.92 21.75 23.42 23.42 23.42 23.42 23.42 I (J) 5'.0' 20.08 20.08 20.25 20.08 21.58 21.58 21.58 21.58 21.58 2x4 6'-0' 18.42 18.75 18.92 18.92 20.25 20.25 20.25 20.25 20.25 5MB 7' -0' 17.42 17.92 17.92 17.92 19.08 19.08 19.08 19.08 19.08 8'-0' 16.75 17.08 17.08 17.08 18.25 18.25 18.25 18.25 18.25 9'-0' 16.08 16.42 16.42 16.42 17.42 17.42 17.42 17.42 17.42 4'-0" 28.08 26.56 26.75 26.56 29.92 31.92 31.92 31.92 31.92 (K) 5'-0' 26.08 26.42 26.56 26.58 27.56 29.25 29.25 29.25 29.25 2X6 6'-0' 24.56 24.92 24.92 24.92 25,92 27.42 27.42 27.42 27.42 5MB 7' -0' 23.25 23.56 23.75 23.56 24.42 25.92 25.92 25.92 25.92 8'-0' 22.25 22.56 22.56 22.58 23.42 24.56 24.58 24.58 24.56 9'-0' 21.42 21.56 21.75 21.75 22.42 23.56 23.58 23.58 23.56 4'-0' 31.56 32.06 32.08 32,06 33.06 34.92 35.92 35.92 35.92 (l) 5'-0' 29.42 29.58 29.75 29,75 30.56 32.25 33.06 33.06 33.08 2x7 6'-0' 27.56 27.92 27.92 27.92 26.75 30.06 30.92 30.92 30.92 5MB 7' -0' 26.25 26,42 26.56 26.56 27.25 26.42 29.25 29.25 29.25 8'.0' 25.06 25.25 25.42 25.42 26.08 27.06 27.75 27.75 27.75 9'-0' 23.92 24.25 24.25 24.25 24.92 26.08 26.58 26.58 26,58 4'.0' 38.25 38.58 38.58 38,58 39.42 40,92 41.75 44.25 44,25 (M) 5'-0' 35.42 35.75 35.75 35.75 36.58 37.75 38,58 40.75 40.75 2x8 6'-0' 33,42 33.58 33.75 33.58 34,25 35.42 36,08 37.92 37,92 5MB 7' -0' 31.75 31.92 31.92 31.92 32.58 33,58 34,08 35.92 35,92 i 8'-0' 30.25 30.58 30.58 30,58 31.08 32,08 32,58 34.08 34,08 9'-0' 29,08 29.25 29.42 29.42 29.92 30.75 31,25 32.75 32,75 4'-0' 41.92 42.25 42.25 42.25 43.08 44.42 45.08 47.42 48.42 (N) 5'-0' 38.92 39.08 39,25 39.08 39.92 41.08 41.75 43.58 44,58 2x9 6'-0' 36.58 36.75 36.92 36.75 37.42 38.42 39.08 40.75 41,58 5MB 7'-0' 34.92 34.92 34.92 34.92 35,58 36.42 . 36.92 38.58 39,25 8'.0' 33.25 33.42 33.42 33.42 33.92 34.75 35.25 36.75 37.42 9'-0' 31.92 32.08 32.08 32.08 32.58 33.42 33,92 35.08 35.75 INTERPOLATION BETWEEN VALUES IS PERMISSIBLE ~ 52 ALUMINUM STRUCTURES MASTER PLAN ENGltEERING,INC, @ COPYRIGHT AL. INC, 1994 ;; a c 'I: C C C G C C iii C I:i II Ii G Ii Iii I: I: ~ c: E ~ C I: I: I- E _ ~'!c,~~:~~.::::::-.-~-,,!::~~~~II 'l'llll ..iJ.tt.;.~. .,... M,l,tl~ ,J~Jh'l!'~~'l' - ,;~.,,'. '