P184-H100-707rB.xlsPage1AllowablestresstoABSMODU2001,part3,charpter2,section1,item3.3F=Fy/F.S.,whereFy=235N/mm2,or34ksiF.S.=1.67foraxialorbendingstress2.50forshearstressHence,F=140.72,orN/mm20.4ksiforaxialorbendingstress2,or94.013.6N/mmksiforshearstress1.Bulkhead1.1Windpressurep=fV2.c.cN/m2wherekhsf=0.611Vk=100knots=51.44m/sc=1.0sc=1.1hhencep=1778.4N/m2or37.13lbf/ft21.2BulkheadplatingPlatepanelmaximumsize(mm)4070by690Platethickness,t(mm)8Bulkheadloadtowindpressurep=1778.4N/m2or37.13lbf/ft2Stressduetolateralperpendicularload:σ=kpb2/t2wherek=0.741forpanelsizeratioof5.9(4070/690)p=37.13lbf/ft2,or0.26lbf/in2b=690mmt=8mmHenceσ=1421lbf/in2,or1.42ksiOK1.3HorizontalStiffenerofbulkhead1.3.1Combinedbeamsectionmodulus(BF+attachingplate)pltwidthsectionctr.dist.tomom.ofthk(cm)/sectdepd(cm)I(cm4)SM(cm3)area(cm2)plttop(cm)0inert.(cm4)(cm)attplt0.86148.80.42.6482.1section-1520.9410.84484.01601.5Combined69.743.52083.617010.4in3P184-H100-707rB.xlsPage21.3.2Bendingmoment&reactionforceBulkheadloadduetowindpressurep=1778.4N/m2or37.13lbf/ft2Distributedloadalongthebeamlength,q=0.69*p=1227.1N/mBM=qL2/8whereL=4.07mmaxHence,BM=2540.8N.mmaxRF=qL/2=2497.1Nmax1.3.3StressesBendingstressatmid-span,σ=BM/SM=14.96N/mm2,or2.2ksiOKmaxShearstressatsupport,τ=RF/A=1.19N/mm2,or0.2ksiOKmaxBF1.4Verticalgirderofbulkhead1.4.1Combinedbeamsectionmodulus(T+attachingplate)sectionctr.dist.tomom.ofthk(cm)width(cm)d(cm)I(cm4)SM(cm3)area(cm2)plttop(cm)0inert.(cm4)topflg1.215180.62.24789.7web1303016.22250.02265.1btmflg1.4152131.93.44723.0Combined6916.911777.769742.5in31.4.2Bendingmoment&reactionforceBulkheadloadduetowindpressurep=1778.4N/m2or37.13lbf/ft2Distributedloadalongthebeamlength,q=2.25*p=4001N/mBM=qL2/8whereL=6.74mmaxHence,BM=22721.7N.mmaxRF=ql/2=13484.7Nmax1.4.3StressesBendingstressatsupport,σ=BM/SM=32.62N/mm2,or4.7ksiOKmaxShearstressatsupport,τ=RF/A=4.49N/mm2,or0.7ksiOKmaxwebP184-H100-707rB.xlsPage32.Bo