Sheet1DESIGN OF VERTICAL PORTION OF DAVITDESCRIPTIONSYMBOLUNITVALUERATED CAPACITYW1KG1371WEIGHT OF MISC. ATTACHMENTSW2KG376WEIGHT OF DAVIT PIPEW3KG33TOTAL WEIGHT (W1+W2+W3)W'KG1780IMPACT FACTORIF-1.3DESIGN WEIGHT=W'*IFWKG2314MAX VERTICAL HEIGHT ABOVE BRACKETHspMM879PIPE SECTION--4'' NB SCH 160PIPE ODdoMM114PIPE THICKNESSNOMINALtNMM13MINIMUMtMM13PIPE ID = do - 2 * tdiMM88C/S AREA OF PIPE = * (do2-di2) / 4AMM24124.911154702C.G DISTANCE = do/2CXMM57M.I. @ X-X AXIS = * (do4- di4) / 64IXXMM45346916.08428247SECTION MODULUS @ X-X = IXX/CXZXXMM393805.5453382889MAERIAL--SA 106 GR BYIELD STRENGTHfyKG/MM224.61MODULUS OF ELASTICITYEKG/MM220600MINIMUM RADIUS OF GYRATION = SQRT(IXX/A)RMINMM36.0034720548MULTIPLIFICATION FACTOR FOR LENGTHf-2SLENDERNESS RATIO = f * Hsp / RMIN-48.8286240095ELASTIC CRITICAL STRESS = 2 * E/2fccKG/MM285.2742667649A FACTORn-1.4ALLOWABLE AXIAL COMPRESSIVE STRESS =MIN OF 0.66*fy & 0.6*fcc*fy / {[(fcc)n+(fy)n]1/n}acKG/MM213.1549606698ALLOWABLE BENDING STRESS = 0.66*fybcKG/MM216.2426AXIAL COMPRESSIVE STRESS = W/Aac AKG/MM20.5609817795ECCENTRICITYL1MM610BENDING STRESS = W*L1/ ZXXbc AKG/MM215.0475112629A COEFFICIENT Cm-1STRESS RATIO FOR COMBINED AXIAL COMPRESSION & BENDING = (ac A/ac) + Cm*(bc A/bc)/(1-ac A/(0.6*fcc))ac-0.0775646863

AS STRESS RATIO < 1.00, DESIGN IS SAFE.DESIGN OF HORIZONTAL PORTION OF DAVITMOMENT = W * L1MKG-MM1411540BENDING STRESS = M / ZXXbKG-MM215.0475112629AS ACTUAL STRESS < ALLOWABLE STRESS, DESIGN IS SAFE.

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