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). 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.Rigging equipment must be included in the lift weight. Additional side-ward bending moment due to change of shape Crane load charts often have different capacities based on outrigger and boom positions. STINGER 3470 Boom Truck Crane BOOM TRUCK CRANE STINGER 3470 FEATURES 34,000 Ib (15 422 kg) maximum lifting capacity 80’ (24.38 m) maximum sheave height 120’ (36.57 m) maximum sheave height with 24-40’ (7.31-12.19 m) jib 27-70’ (82.30-21.Additional loads on the crane induced by geometrical changes Grove rough terrain cranes are designed to handle the toughest jobsite conditions with lift capacities ranging from 30 t to 150 t (30 USt to 165 USt).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.

Crane capacity chart