Crane Structures

When Web Slenderness Governs Structural Resistance In crane girder design, the web does not carry bending alone.It also transfers significant shear forces between supports and wheel load positions. For slender webs, shear resistance may be governed not by material yielding, but by shear buckling. According to EN 13001-3-1, shear stability must be verified explicitly when […]

Local Effects Beneath the Rail in Crane Girders While global bending governs overall stress in a crane girder, wheel loads introduce highly localized effects that must be assessed separately. Under each wheel, concentrated vertical forces generate transverse compression in the web and flange region beneath the rail. This local stress state differs significantly from global

Why Different Plate Elements Behave Differently In crane girder design, not all plate elements respond to compression in the same way.The web and the compression flange are subjected to different stress states, boundary conditions and instability mechanisms. Understanding these differences is essential for realistic buckling verification according to EN 13001-3-1. Stress State in the Web

Plate Buckling in Crane Girders In crane girder design, material yield strength is not always the governing resistance criterion.For slender plate elements, instability may occur before the material reaches its yield stress. This phenomenon is known as plate buckling and plays a central role in crane girder verification according to EN 13001-3-1. Slender Plate Elements

Serviceability Requirements According to FEM Practice In crane girder design, strength and stability are not the only governing criteria. Even when stresses and buckling checks are satisfied, excessive deflection may impair crane operation. Deflection control is therefore a fundamental serviceability requirement in crane main girder design. Why Deflection Matters in Crane Structures Unlike ordinary floor

Local and Global Stability According to FEM 1.001 Static strength verification ensures that stresses remain within permissible limits under maximum loading.However, even when stresses are acceptable, structural instability may still govern the design. According to FEM 1.001, crane main girders must be verified not only for strength but also for stability, including both global and

Why Trolley Position Governs Structural Design One of the fundamental differences between ordinary structural beams and crane main girders is the presence of moving concentrated loads. The trolley and hoisted load travel along the span, which means the internal forces in the girder are not constant. Instead, bending moment and shear vary depending on the

Load Cases and Governing Trolley Positions Static verification is the first fundamental step in the structural design of crane main girders according to FEM 1.001. Unlike ordinary beams subjected to uniform loading, crane girders experience moving concentrated forces from wheel loads. This makes identification of the governing load case and load position essential. Nature of

Structural Philosophy Behind Overhead Crane Beam Design The main girder of an overhead crane is not designed as an ordinary beam.Its structural verification follows specific principles defined in FEM 1.001, where strength, fatigue and stability are evaluated within the operational context of crane duty. Unlike conventional building beams, crane girders are subjected to: Moving concentrated

Understanding Actions Induced by Overhead Cranes Overhead cranes do not act on buildings as simple static loads.They introduce a combination of vertical, horizontal and dynamic actions that vary depending on operating condition, movement and testing requirements. For structural engineers designing runway beams, columns and supporting frames, understanding the nature of these loads is essential before