EWPAA Structural Plywood and LVL Design Manual - Engineered ...

FIGURE 11.5: Bending stresses in stressed skin panelThe values of y and the y’s shown in FIGURE 11.5, when substituted in Equation 11.6 for y, will on solutionresult in the evaluation of extreme fibre stresses f b,a .Splice Plate CheckFrom Equation 11.6 :where:MyEf b = for the full panel width;EIMF spg2wL= for maximum moment under u.d. loading;8= splice force⎡ Wsp⎤= fb⎢ ⎥ A sp⎢⎣Wp⎥⎦WWspp= total width of splice plate / total panel widthFsp⎡ 2wl E sp Wsp⎤3fsp= ⎢ x x y x x 10 ⎥ MPaAsp⎢⎣8 EIgWp⎥⎦where f sp = splice stressw = uniformly distributed load (kN/m)E sp = modulus of elasticity of splice materialEI g = stiffness factor (N-mm2) from TABLE 11.2y = distance from neutral axis to the extreme tensionor compression fibre (mm)= (11.7)NOTE:The above f sp is for the splice plate at the point of maximum moment. If this controls thedesign the splice can be relocated in a new area of lower moment.Rolling Shear StressFrom FIGURE 11.4:where:d sQs= c-y’= A.ds149