[Public-List] Mast beam almost finished!

[Glenn]

Hi Jeff,  i had the same concern when I replaced my beam.  Eventually I drilled the bolt holes and thru bolted.  My reasoning is that all the boats have these bolts with no failures in 45 years so it is a proven method.   Also I didnt think I would gain anything by using lag bolts.  They wont give you the structural integrity of thru bolts and will likely pull out if the mast ever did go over.  At worst lag bolts have a high risk for  creating pockets for water penetration and early dry rot. 

On that cheerful note....

Glenn
dolce 318

Sent from my iPad

On Oct 26, 2013, at 12:13 AM, Dominic Amann <dominic.amann at gmail.com> wrote:

> I suspect that bolting through will not introduce much more weakness than
> drilled in lag bolts. Bear in mind that the failure you were observing was
> a delamination of the beam, and I think through bolts would actually help
> prevent that.
> 
> 
> On Fri, Oct 25, 2013 at 4:10 PM, George Dinwiddie
> <gdinwiddie at alberg30.org>wrote:
> 
>> Jeff,
>> 
>> On 10/24/13 7:17 AM, Jeffrey wrote:
>> 
>>> Hi everyone,
>>> 
>>> I'm nearly done replacing my mast beam. I've got the beam in, the
>>> tabbing finished and the posts reinforced.
>>> 
>>> http://216.172.166.167/~**seagrass/ <http://216.172.166.167/~seagrass/>
>>> 
>> 
>> Nice work, and a very nice description.
>> 
>> I still need to decide on how to deal with the bolts, that on the
>>> original beam, went through the mast step and right through the beam.
>>> I don't think bolts going all the way through the beam are necessary
>>> and will weaken the beam. I'm thinking of using some lag bolts that
>>> will go an inch or so into the beam.
>>> 
>> 
>> - George
>> 
>> --
>> ------------------------------**------------------------------**
>> ----------
>>  When I remember bygone days                         George Dinwiddie
>>  I think how evening follows morn;            gdinwiddie at alberg30.org
>>  So many I loved were not yet dead,           http://www.Alberg30.org
>>  So many I love were not yet born.                          also see:
>>               'The Middle' by Ogden Nash     http://idiacomputing.com
>> ------------------------------**------------------------------**
>> ----------
>> 
>> 
>> 
>> ______________________________**_________________
>> These businesses support your Association:
>> http://www.alberg30.org/store/**A30supporters.html<http://www.alberg30.org/store/A30supporters.html>
>> Please support them.
>> ______________________________**_________________
>> Public-List mailing list
>> Public-List at lists.alberg30.org
>> http://lists.alberg30.org/**listinfo.cgi/public-list-**alberg30.org<http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org>
>> 
> 
> 
> 
> -- 
> 
> 
> Dominic Amann
> M 416-270-4587
> _______________________________________________
> These businesses support your Association:
> http://www.alberg30.org/store/A30supporters.html
> Please support them.
> _______________________________________________
> Public-List mailing list
> Public-List at lists.alberg30.org
> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org

 1382768345.0