Crane structural failure

STRUCTURAL FAILURE Crane failure tank failure... 

Hook overtravel will be controlled by an upper-limit switch. Disengagement would require structural failure. The most probable result of structural failure would be binding and/or noisy operations that will alert the operator and those in the general vicinity of a problem with the crane. 

The distances from the pivot point to outrigger or tire support points on the side or ends typically are not the same. The limits differ for a load lifted over the side compared to a load over the front or the rear of the vehicle. Moving a load to different positions may cause structural failure or tipping of a mobile crane. The boom angle and length also affect what load is safe. When cranes operate in tight spaces, there is a need to make precise measurements for making a safe lift. 

COLLISION Structural failure of crane equpment Injury to personnel Damage to tank or equipment 2A RE ANSI B30 requirements for cranes... 

A collision of two cranes This type of risk is directly related to the functionality of the device that monitors the proximity of two cranes. The failure of the device causes increased probability of two cranes colliding. The collision may result not only in the functional failure of the lifting machine system, but also in injuries caused by potential derailing of the crane from the guiding structure (GS). 

Note that the O SHA addresses only human errors or operator errors— not hardware failures. This is its strength and its weakness. Because this hazard analysis technique focuses on the operations of a system, it is very good at identifying the kinds of operational hazards that are often obscure to the engineer. However, as the aforementioned example shows, this worksheet does not identify any structural or design inadequacies of the crane or other lifting hardware. It is precisely for this reason that the O SHA should never be used alone, but only in tandem with a hardware hazard analysis or a subset of the overall SHA. 

Failure of support - placing over cellars and drains, outriggers not extended, made-up or not solid ground, or failure of structural components of the crane... 

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