Tuesday, March 27, 2012

Rigging Inspection: Ascending the Mast

Here is where things get interesting in that you cannot go up the mast to inspect the masthead fitting without the use of steps or a boatswain's chair.  I for one, do not go up a mast unless the halyard goes through the masthead and back down to a winch.  Use your binoculars to get a better look at things aloft.  I do not suggest using an external block at the masthead unless you have no other choice.  Always use a safety line (another halyard) and a safety clip on your boatswain's chair.

If you are climbing up the mast using mast steps, most certainly use a safety belt. On a wooden mast the steps are usually screw fastened so check for any loose screws.  On an aluminum mast it is common to use stainless steel machine screws or pop rivets. Never trust only one step completely.  Try to spread your weight evenly between the steps.  Use your safety belt and a second halyard with a strong person (who likes you) to tail this safety line.

When you arrive at the lower shroud terminals check the fastenings holding the mast tangs to the mast.  Check the swage terminals for cracks or any unusual markings. This is when you will find out whether or not the standing rigging has been completely replaced.

As I mentioned earlier sellers may claim that the rigging is all new when in fact only the end terminals at deck level have been replaced.  Be suspicious even if both upper and lower terminals have been replaced.  Look at the wire very carefully to determine whether the wire was replaced at the same time.
Often the owner will show you receipts of exactly what has been replaced.  Most insurance companies recommend replacing all the wire every ten years.

Often masts have a compression tube fit through the mast so as not to compress the mast under a load. Whether you have two or four lower shrouds depends on what type of rig you have.  Most offshore type rigs have four lowers.

While we are on the subject, all standing rigging should comprise of at least one or more toggles where the rigging terminates allowing for proper alignment between the chain plate and the angle of stress.

We will talk about chain plates in great detail later in this purchase inspection series.

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