About masts - SailNet Community
LinkBack Thread Tools
post #1 of 2 Old 03-14-2008 Thread Starter
Junior Member
Join Date: Jul 2007
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
About masts

A couple of questions....

I'm continuing repairs/refurbishment on my 34ft locally built (mainly been doing electrics) and have now got around to looking at the mast. Aluminium, deck stepped.

1. It has elongated holes in the sides about 3ft from deck for the halyards. What usually happens to rainwater or heavy seas when they go into these holes? Does the water finish up in the bilges (running down inside the compression post) or should there be some other hole in the mast just above deck level to drain the water out again?

2. I've never been to the top of a mast, but this is coming up very soon. Some repairs are needed - coax cable, wiring for steaming, spreader and anchor lights, conduit put in etc. So question is - how are aluminium masts normally finished off at the top? I assume they have some sort of cap which is either welded or bolted on to keep out weather etc. I'm just interested in any info about the general practices of boat builders when finishing off mast tops. Welding, bolting, whatever they felt like on the day...?
rugila is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #2 of 2 Old 03-14-2008
Telstar 28
sailingdog's Avatar
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 16 Times in 13 Posts
Rep Power: 14
1) The elongated holes are called halyard slots and usually have a cast fitting put into them to protect the line from chafe and help it lead fair. Most masts aren't sealed, so will let the water out at the base. This is often a cause of wet bilges on keel stepped mast boats.

2) Most aluminum masts have a cast or machined piece at the top that holds the windex, anchor lights and masthead sheaves. This piece also is where the tangs for the shrouds and stays connects. It should be held in place by two or more bolts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

sailingdog is offline  
Quote Quick Reply Share with Facebook

Quick Reply

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Deck vs. Keel Stepped Masts Envirella Gear & Maintenance 10 11-29-2009 12:06 PM
Howling Masts Don Casey Gear and Maintenance Articles 0 09-03-2002 09:00 PM
Stepping Masts with a Pole SailNet Gear and Maintenance Articles 0 09-09-2001 09:00 PM
Modernizing the Free-Standing Rig Bruce Caldwell Buying a Boat Articles 0 12-25-2000 08:00 PM
Deck-Stepped vs. Keel-Stepped Masts Dan Dickison Buying a Boat Articles 0 12-12-2000 08:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome