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'. r MAXIMUM ROOF BEAM SPANS IN DECIMAL FEET SCREEN ROOF I SCREEN WALLS EXAMPLE: WIND 110 MPH DEFLECTION U60 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 1~.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 I, 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 ,'" (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 I 4'-0' 28.08 28.58 28.75 28.58 29.92 31.92 31.92 31.92 31.92 , ~ (K) 5'-0' 26.08 26.42 26.58 26.58 27.58 29.25 29.25 29.25 29.25 " 2X6 6'-0' 24.58 24.92 24.92 24.92 25.92 27.42 27.42 27.42 27.42 i I 5MB 7'-0' 23.25 23.58 23.75 23.58 24.42 25.92 25.92 25.92 25.92 8'-0' 22.25 22.58 22:58 22.58 23.42 24.58 24.56 24.56 24.56 t 9'-0' 21.42 21.58 21.75 21.75 22.42 23.58 23.58 23.58 23.56 I . . . 4'-0' 31.58 32.06 32.08 32.08 33.08 34.92 35.92 35.92 35.92 , , . . (L) 5'-0' 29.42 29.58 29.75 29.75 30.58 32.25 33.08 33.08 33.06 2x7 6'.0' 27.58 27.92 27.92 .27.92 28.75 30.08 30.92 30.92 30.92 ! 5MB 7'-0' 21'-.25 26.42 36.58 26.58 27.25 28.42 29.25 29.25 29.25 , 8' -0" 25.08 25.25 25.42 25.42 26.08 27.08 27.75 27.75 27.75 9'-0' 23.92 24.25 24.25 " 1 24.25 24.92 26.06 26.56 26.58 26.56 , I I. ., , -c. .. , 4'-0' 36.25 38.56 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 36.58 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 /I:. 5MB 7'-0' 31.7' 31.92 31.92 31.92 32.58 33.56 34.06 35.92 35.92 " 6'-0' 30.25 30.58 30.58 30.58 31.08 32.08 32.58 34.0.6 34.06 '. 9'-0' 29.08 29.25 29.42 29.42 29.92 30.75 31.25 32.75 32.75 I , I 4'-0' 41.92 42.25 42.25 42.25 43.08 44.42 45.06 47.42 48.42 I (N) 5'-0' 38.92 39.08 39.25 39.08 39.92 41.08 41.75 43.56 44.56 .,; 2x9 6'.0' 36.58 36.75 36.92 36.75 37.42 36.42 39.06 40.75 41.56 5MB 7'-0' 34.92 34.92 34.92 34.92 35.58 36.42 36.92 36.56 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 32.56 33.42 33.92 35.06 35.75 INTERPOLATION BETWEEN VALUES IS PERMISSIBLE