Spreadsheet for complete description of the ratings (post-processing) Įvery load chart value has a remark, describing the critical issue (strength, stability, etc.) įor every rating-position or configuration a graphical output of the crane can be generated.Spreadsheet for completely describing the crane (pre-processing) Įvery cell has a graphical remark to guide the STERK© user.Interpretation of STERK© source code, using STERK© during the making of ratings.
Description of the validation of the STERK© code with STERK©.Eager.sterk© calculates your crane capacity chartsĮager.sterk© is our in-house design software to calculate capacity charts for all kinds of cranes, independent of any brand. Therefore, to speed up this process Eager.one has developed a handwritten code, applicable to run different configurations at the same time, without the need for re-modelling. However, this is not a quick process, especially when it comes to many different configurations of a crane. Historically, these calculations are done by “nonlinear” FEM (finite element method). Rigging equipment must be included in the lift weight. Additional longitudinal bending due to change of shapeįor every boom-, jib length and lifting radius it requires a cyclic (nonlinear) calculation to predict the deformations. Crane load charts often have different capacities based on outrigger and boom positions.Additional side-ward bending moment due to change of shape.Additional loads on the crane induced by geometrical changes.What does this mean for the determination and calculation of the crane capacity? Since the 2 nd order effect increases for slender (high) cranes, calculations get more complex and more time-consuming due to its non-linear (cyclic) character. Cranes are getting higher with increased slenderness as a result.
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