huangyhg

beacon line jib crane
my client wants to relocate an existing 2-ton beacon line jib crane manufactured by cleveland beacon products. the client has none of the original information from the crane vendor regarding. the vendor no longer makes the crane. i have contacted them for information as to design forces to be used for the foundation design and anchorage of the crane to the foundation.
the crane is 2-ton, has a 22' boom and is 16'7" high.
i know i can use statics and refer to the asce 7 for the appropriate load increases, but i was hoping someone might have some old cleveland product literature to share.
thank you
pat2

pat2,
i never heard of cleveland beacon jib cranes, but maybe you could research similar products from current manufacturers for technical data. personally i would do the calcs myself.
i assume this is a free standing base plate mounted crane that needs to be bolted to a block type foundation. the most severe load case for overturning is when the load is at the end of the boom when located over one of the foundation corners. to avoid uplift on the back side of the foundation these blocks can get very big and heavy. the allowable soil capacites are involved in these calculations which may be more or less than assumed in manufacturers designs.
designs for overturning should include weight of boom, hoist, lifted load, and impact. impact is a function of hoist speed and is usually about 15% but i'm not sure about that. the monorail and cmaa specs have that info.
if you are not comfortable with these calculations, or if you want to bolt this crane to an existing concrete floor, you should consider getting a consultant.
regards,
-mike

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