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Deck Mounted Winch - Force, Stress,
Hi all,
I'm trying to determine how many bolts are needed to mount a winch to the deck of a boat.
The problem:
A winch will be mounted to the deck of a boat using the 2'x2' spacing with 1"-8 bolts. The winch has four feet (one in each corner) that elevates it off of the deck. These feet can be directly bolted to the deck, or the can be modified/replaced with new feet to meet the loading requirements. The new feet can be plates that span the length or width of the winch, to whatever dimensions necessary. The loading of the winch is currently unknown but an assumption of 2500lbs can be made. The loading is subject to directional change (alpha in the picture) and can also change in height based on the quantity of rope on the spool. The weight of the winch itself is unknown but an assumption of 5000lbs can be made. The quantity of bolts needed is unknown and is dependent on the total loading.
(See picture for diagram)
Hopefully this is a clear enough description, let me know if anything isn't clear.
I'm not asking for this to be designed for me (unless you really want to :grin:) but I do need some guidance on how to approach this.
I plan to start with a FBD and determine the loads on the current four feet through a static analysis. From this point, I am a bit stuck as I'm not sure what the next step to take is in determining the quantity of bolts, or if needed, how to design a plate to bolt onto the deck that will have the required quantity of bolts to accept the load.
Please let me know your thoughts.
Thanks,
AK