Originally Posted by BinkleyBoat
Looking for a new/used RIB for a GB42/1981 classic, which has the aluminum mast/boom combo. What is the lifting capacity of this combination? I intend to use part of the aft cabin for storage.
About your question for the weight limit on the mast and boom to lifting a RIB tender :
In 1986 I visited the Grand Banks shipyard (American Marine LTD) in Singapore. On this occasion, I asked many questions to the technicians of the shipyard, one of my questions was the weight limit of the lift capacity with mast/boom.
The answer I got was very clear : the woody 42' GB have mast and boom made with wood, the weight limit of the lift capacity with wood mast/boom was 200 kg maximum (440 pounds). The fiberglass 42' GB have mast and boom made with ALUMINUM, the weight limit of the lift capacity with wood mast/boom was 150 kg MAXIMUM (330 pounds).
With both wood and aluminum mast/boom they told me it is very important to check the wire tension of the shrouds of the mast before operating a lift.