Introduction to Lateral Restraints In lightly loaded short-span Crane-Girders the top-flange of the girder may be stiffened by fixing an inverted channel horizontally to give additional support and to resist lateral loading from the crane wheels. However, the channel itself only offers limited resistance against anything but the lightest lateral load conditions, consequently, in most …
Crane-Rails Standard flat-bottom rails are usually used for light to medium duty applications, but because of their height-to-width ratio they may be prone to overturning when subjected to large lateral loads. Their relatively thin webs are also subject to a combination of high vertical stress and bending stress from the lateral loads causing what could …
Crane Classifications Two cranes with the same rated capacity and span may differ in their average load intensity and/or expected loading cycles. There are different standards which classifies cranes based on the service class. The Crane Manufacturer Association of America (CMAA) classifies bridge cranes according to average load intensities and number of cycles. On the …
Introduction to Crane-Beams and Girders Crane-Beams of Girders, are a stand-alone structural component, in that unlike conventional beams and Plate-Girders they have to withstand high lateral forces generated by the movement of the crane gantry along the track, and the cross-movement of the trolley across the crane gantry. Additionally, they have to resist the longitudinal …
