design considerations for aluminum hull structures - Ship Structure ...

-94-TABLE 20 Aluminum Bulk Carrier - Equipmentand Outfit Weight EstimateItemWeight Weight WeightSteel Weight Alum● DHf.(Long Tons) Coefficient (LJriETons) (lon~ Tons)hplanationWeightdCoefficientHatch Covers 23S .% 130 -105Woodwork 20 20Joiner Work 8S 85Deck Cover- 80 Add 31 Tons 111 + 31Insulation 20 Add 93 Tons 113 + 93Painting 60 .30 -42Hull Attachments+ 150;; -45II (jyxxl ::: 50 -Ventilation1!60(:: ; ;%1140 - -9Deck Machinery 100 1.01 101 + 1Piping 19060 - 62II (l;: ; :%) 68Misc. Equip. 130 .8o 104 - 26Elec. Plant 60 1.02 61 + 1Sire.to bhd. studyNo changeNo changeAdded fire projectionAdded fire protectionNo topside paintingChanged to alum.No changeChange to alum.No changeDissimilar metalsisolationChange to aluminumOptimizedmetalsEstimatedDissimilar metalsisolationTotal 1,190 1,027Overall Weight Ratio for Equipment and Outfit = 1,027/1,190 = 0.86SHIFT IN V.C.G. AND L.C.G.Item WT VCG Mv LC~ICGA MA‘F—Origll Wt. F&O 1790 X4 6~1156 — mo IG,560fki,~ch CoverReduction -105 55.0 +l;;; 28.o -2,940Dk Covlg Incr + 31 60.0 210.0 +6,51OInsulln lhcr + 93 38.0 3,534 210.0 +19,530fiintReduction -42 SO.O 2,100 150.0 - 6,3oOHull AttachReduction -45 :;.; -2,700 200 -9,000Vat Reduction - 9 -540 210 - 1,890Dk Machy hCr + 1 60:0 +60-Piping Reduction - 62 15.0 - 930 5; 3,100Mist Eq. Reduction - 26 60.0 -1,560 150 3,900Elec Plant Incr + 1 60.0 + 60 200 + 200Total - E&O 1,027 53.90 55,365 166.07 I70,550+ Assumed to include Masts, Sparsj Rudder~ etc.