5 Perancangan Ulang Konstruksi Girder Overhead Crane Kapasitas 10 ton Bentangan 14 meter

Abstract

Abstract - PT.BOSO makes overhead crane for vacant land that will be used as workshops. The
manufacturing of new cranes uses the size of existing crane data with a capacity of 5 tons. Size of
plate that will be uses is same and length of the span that was originally 16 m will be made into 14 m.
Construction of the girder has been made, but the construction has not been realized into a crane that
can operate because there is no calculation to analyze the strenght of the structure. This research
shows that the load that can be applied to the cnstruction of the girder is 20 tons and 18 tons for the
end carriage. Due to this finding, the researcher gave 10 tons of SWL on the overhead crane
construction. Exiting data of girder made a SS400 for material and the allowable stress is 117,5
N/mm2 and the value of the stress is 59,50 N/mm2
in FEM calculation with the value of the deflection
10,69 mm. The result of redesign uses ST52-3 material with the administration of SWL 10 ton and the
allowable stress is 177,5 N/mm2 as well as FEM calculation result with the value of the stress is 78,30
N/mm2
and the deflection is 13,42 mm. For the result of the girder optimazion uses SS400 material
with the administration of SWL 10 ton and the allowable stress is 117,5 N/mm2 as well as FEM
calculation result with the value of the stress is 76,55 N/mm2
and the deflection is 16.22 mm.