Introduction of Gantry Girder

Types of Load on Gantry Girder:

Vertical Loads on Gantry Girder. Lateral Loads on Gantry Girder. Longitudinal Loads on Gantry Girder. Impact Loads on Gantry Girder. Read more

#1. Vertical Loads on Gantry Girder

As with the longitudinal gantry girders, the frictional resistance of the rail is transferred into the crab girders and from them into the crosshead girders, thence, as point loads through the main wheels, into the top or compression flanges of the gantry girders. The positions of the main wheels when maximum lateral bending and shear take place on the gantry girder will be the same as those when maximum vertical bending moment and shear occurs. Read more

The crane is often requisitioned to drag weights across the shop floor. If the load is extremely massive, it is usually mounted on roughly fashioned rollers, probably running on a timber plank track. The lateral thrust and pull on the compressive flanges of the gantry girders then become a matter of conjecture. The resisting forces are, firstly, the friction of the main wheel treads upon the gantry rails and, secondly , the forces offered by the flanges of the main wheels bearing against the gantry rails. The lateral thrust is assumed to act in the plane of the center of gravity of the upper flange. Acting as it does at the rail level, it has really a lever arm producing torque. This small lever arm and, therefore, the torque are neglected. No help is assumed to be afforded by the lower or tensile flange in resisting lateral thrust. However, should this help be considered, then the torque due to the thrust multiplied by the distance from the line of action of the thrust to the N.A. (n in this case)—should also be taken into consideration. Read more

#3. Longitudinal Loads on Gantry Girder

Types of Load Additional Load (a) Vertical forces transferred to the rails i. For electric operated cranes 25 % of maximum static wheel load ii. For hand-operated cranes 10 % of the maximum static wheel load (b) Horizontal forces are transverse to the rails. i. For electric operated cranes 10 % of the weight of the crab and the weight lifted on the crane. ii. For hand-operated cranes 5 % of the weight of the crab and the weight lifted on the crane. (C) Horizontal forces along the rails 5 % of the static wheel load Read more

Gantry Girder-

Web Plate

Safe Load Calculation for Gantry Girder

Determine the Material Properties Analyze the Structural Design Apply Appropriate Load Factors Perform Structural Analysis Check Against Safety Criteria Iterative Refinement Read more

Load Distribution on Gantry Crane Girder

Safety Precautions Determining the Test Load Load Application Load Duration Monitoring and Measurements Post-Loading Inspection Evaluation and Certification Read more

Factors Affecting Load Capacity of Gantry Girder

Material Strength Cross-Sectional Shape and Dimensions Span Length Support Conditions Live Load and Dead Load Load Position and Distribution Environmental Conditions Safety Factors and Design Codes Read more

Gantry Girders Are Designed to Resist?

Gantry Girder Design

Difference Between Plate Girder and Gantry Girder

What Is Gantry?

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Introduction of Gantry Girder | Load on Gantry Girder | Types of Load on Gantry Girder