shroud attachment...steel or aluminum

Discussion in 'Sailboats' started by zoomee, Oct 20, 2004.

  1. zoomee
    Joined: Oct 2004
    Posts: 4
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: va

    zoomee New Member

    boat is a 1972 Morgan 42 MkII. The shroud chainplates are attached to the hull via big stainless bolts into a three foot long section of steel u channel beam...four inches wide and maybe 1/4 thick.

    The u beam is very corroded and need to be replaced.

    I am thinking of replacing with aluminum to reduce the corrosion problem.

    Make sense? Issues to worry about?

    How do I size the aluminum beam to get the same strength as the original steel?
     
    zoomee, Oct 20, 2004
    #1
  2. water addict
    Joined: Jun 2004
    Posts: 325
    Likes: 6, Points: 18, Legacy Rep: 73
    Location: maryland

    water addict Naval Architect

    You need to find out what grade of steel the original chainplate is. You'd be safest replacing with a high grade stainless of similar/same size as the original. If the attachment from the turnbuckle is stainless, it's probably not a good idea to connect a steel pin to an Aluminum chain plate. Good marine stainless grade AL6XN.
     
    water addict, Oct 22, 2004
    #2
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