Monthly Archives: June 2023

Figure 7‐5 This is a close‐up view of Figure 7‐4. The arrow points to the end of the crack. The crack is propagating toward the bottom flange of the girder. Cracks in the bottom flange of a girder can cause a catastrophic girder failure.
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calculation Stress girder Overhead Crane

To calculate the stress in an overhead crane girder, you will need to consider the following factors: 1. Dead Load: This is the weight of the girder itself, including any attachments and accessories. The dead load is a constant and can be easily calculated based on the material weight and dimensions of the girder. 2. Live Load: This is the weight of the crane and the load it carries. The live lo...
calculation joint plate girder Overhead Crane
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calculation joint plate girder Overhead Crane

Certainly! The calculation of joint plates for a girder typically involves determining the size and thickness of the plate required to transfer the stresses at the joint between the girder and another structural member, such as a column or beam. Here are the general steps for calculating joint plates for a girder: 1. Determine the load conditions and stresses at the joint. This includes the magn...
Crane Terminology
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Crane Terminology

ADJUSTABLE FREQUENCY DRIVE – A motor controller designed to convert fixed frequency AC power to available frequency power for AC motor speed control. The system is used in conjunction with a squirrel cage motor to control speed over a relatively wide, constant torque range, by maintaining a constant voltage / frequency ratio. This type of control “leashes” the in-rush current to deliver startup p...
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