Cab position on a rubber tired gantry crane cab
I recently had a discussion concerning the cab position on a rubber tired gantry crane cab position. (Mi-jack, Shuttlelift)
The question that was being discussed is: does the direction the cab is facing have a direct effect on operator fatigue when operating the crane?
The situation is this: the cab on the crane in questions faces forward, the direction of travel, therefore the operator needs to look over his right shoulder looking out the right window to watch what he is lifting, therefore it is a design flaw in the crane because the operators cab causes the operator to fatigue when operating the crane, therefore the design flaw should be indicated on the inspection report for the crane.
Question 1: has anyone ever had a discussion or heard of this issue of operator fatigue because of the cab position on a gantry crane?
Question 2: when inspecting a rubber tired gantry crane, have you ever indicated on your inspection report that the direction the cab is turned could cause operator fatigue?
Ray Feidt
ANSI B30.2-2005 States that the arrangement of the cab should allow the operator a full view of the load block in all positions. Keep in mind should is not mandatory, however ANSI recognizes the fact that there are physical arrangements that can make this impossible. In this case ANSI states that the operator shall (shall is mandatory) be aided by other means such as mirrors, video camera etc;
We found this same situation on a cab operated bridge crane and ended up installing a video camera along with a screen in the cab. This took care of the problem.
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