Mathematically Derived Deflection Values Facing and Core Combinations per Graphs TABLE 2 TABLE 1 f j Inch Plywood Facings Inch Plywood Facings Uniform Load (pst) 10 20 30 Uniform Load (pst) 40 Span (ft) Allowable Max Max Max Max Span (ft) Allowable 10 20 30 40 Max Max Max Max 8 .4 .221883 .277039 .286807 .218019 10 .5 .321199 .439018 .481137 .26556 .448834 12 .6 .439521 .486642 .467971 .7 .639694 .655283 .698817 .614963 14 .7 .576781 .689317 .582998 .445631 16 .8 .669506 .777384 .765879 - 16 .8 .732944 .766832 .713005 - 18 .9 .867269 .802524 - - 18 .9 .731778 .862254 .857659 - 20 1.0 .923999 - - - 20 1.0 .906959 .971854 - - 22 1.1 .997881 - - - 22 1 .1 .936088 1.09381 - - 24 1.2 1.08472 - - - 24 1.2 1.13073 - - - 26 1.3 - - - - 26 1.3 1.18013 - - - 28 1.4 - - - - 28 1.4 1.39498 - - - 30 1.5 - - - - 30 1.5 - - - - 32 1.6 - - - - 32 1.6 - - - - .34668 .278329 .301262 .195579 8 .4 10 .5 .488717 .465878 .413043 .30905 12 .6 .469249 .550122 .54575 14 TABLE 3 i TABLE 4 f Inch Plywood Facings Uniform Load (pst) 10 20 30 40 Allowable 8 .4 10 .5 12 .6 14 Inch Plywood Facings Uniform Load (pst) 10 20 30 40 Max Max Max Max Span Span (ft) .375426 .7 Max Max .350789 .389661 Max Max (ft) Allowable .375857 .263433 8 .4 .173396 .346792 .30891 .155787 .45528 .403727 .448394 .254527 10 .5 .397854 .464569 .462291 .154302 .582771 .594352 .445824 .362051 12 .6 .460144 .430756 .256086 .215933 .48843 14 .7 .540849 .573625 .374852 .28772 .633663 16 .8 .635612 .736803 .449411 - 18 .9 .742678 .754237 .532173 - .536308 .65223 .5599 16 .8 .687868 .733085 .794541 18 .9 .858289 .830125 .831979 20 1.0 .866441 .940438 - - 20 1.0 .861204 .937975 .696854 - 22 1 .1 1.05583 1.06257 - - 22 1 .1 .990737 .98083 - - 24 1.2 1.09102 - - - 24 1.2 1.13101 1.18604 - - 26 1.3 1.14389 - - - 26 1.3 1.28186 1.24764 - - 28 1.4 1.3546 - - - 28 1.4 1.23599 - - - 30 1.5 - - - - 30 1.5 1.39867 - - - 32 1.6 - - - - 32 1.6 1.57151 - - - .369663