OSHA Hazard Information Bulletins
May 2, 1989
| MEMORANDUM FOR: |
REGIONAL ADMINISTRATORS |
| THRU: |
LEO CAREY
Director
Office of Field Programs |
| FROM: |
EDWARD BAIER
Director
Directorate of Technical Support |
| SUBJECT: |
Safety Hazard Information Bulletin on Truck Cranes |
The Concord, New Hampshire, Area Office has brought to our attention a
potentially serious hazard existing with the use of truck cranes with
possibly insufficient load capacities. The problem occurs when trucks fitted
with boom cranes are not specifically designed for such applications. The
only available load capacity rating in such a situation is the rating of the
crane boom structure itself. This rating is inappropriate for use with a
truck-crane system since it does not take into account the size of the truck,
strength of the truck platform, size or presence of outriggers, and tipping
moment and other engineering mechanics considerations that would be required
to evaluate and rate the total truck-crane package.
OSHA 1926.550(a)(1) requires that when manufacturer's specifications
applicable to a crane are not available, limitations assigned to the
equipment shall be based on the determinations of a qualified engineer.
These specifications must take into consideration both the vehicle and crane
characteristics. The American National Standards Institute (ANSI) A92.2-1979
National Standard for Vehicle-mounted Elevating and Rotating Aerial Devices
applies to the design, construction, testing, inspection, care and use of
machinery including truck cranes with extensible or articulating booms. The
standard sets necessary load capacity specifications for both the crane and
truck components of such units along with standards for the design and
manufacture, testing and inspection, and training of operators for truck
cranes.
Furthermore, the American Society of Mechanical Engineers (ASME)/ ANSI
B3O.22-1987 Standard on Articulating Boom Cranes sets load ratings for
truck-mounted articulating boom cranes of one ton or greater capacity.
ASME/ANSI B30.5-1982 Standard on Mobile and boom cranes. Load ratings
where stability governs lifting performance are determined by adherence to
the ANSI Society of Automotive Engineers (SAE 765a (October, 1980 Crane
Load Stability Test Code.
Please distribute this bulletin to all Area Offices, State Plan States and
Consultation Projects.
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