[Public-List] Mast raising rig and shore cart

[John Birch]

Yes indeed Gord, unexpected dynamic shock loads are what usually is the 
culprit in any failure.


----- Original Message ----- 
From: "Gordon Laco" <mainstay at csolve.net>
To: "Alberg 30 Public List -- open to all" <public-list at lists.alberg30.org>
Sent: Friday, November 30, 2007 11:07 AM
Subject: Re: [Public-List] Mast raising rig and shore cart


>I agree with all the prev comments -
>
> What will cause a break in a lifting apparatus is a shock load... 
> Something
> as simple as a kink in a tackle or an over-enthusiastic helper.  I would
> further suggest that raising an A30 mast short or single handed is best 
> done
> only if all other options are legitimately out of reach.
>
> Cheers -
>
> Gord
> #426 Surprise
>
>
>
>> I agree with Don's weight estimate of 200lb. My A-37 mast and rig is 
>> 450lb.
>> Remember, if you are building a lifting device you should construct it 
>> with
>> a 5:1 safety margin at a minimum - particularly if it isn't being 
>> designed
>> by an engineer who specializes in lifting devices.
>>
>> ATB
>>
>> John
>>
>>
>> ----- Original Message -----
>> From: "Michael Connolly" <crufone at sbcglobal.net>
>> To: "Public List Alberg" <public-list at alberg30.org>
>> Sent: Friday, November 30, 2007 10:48 AM
>> Subject: [Public-List] Mast raising rig and shore cart
>>
>>
>>> Hello all,
>>>
>>>  Thanks George, Brian and Don for your input and suggestions.  If others
>>> wish to add something please do.  CB and Mike Lehman or others might 
>>> have
>>> specific comments to fine tune this operation.
>>>
>>>  I agree that to seriously injure myself is not worth the $150.00 I 
>>> might
>>> save to raise the mast.
>>>
>>>  Perhaps I will add a tall "Flag Pole" to my property to serve a second
>>> function as a gin pole.  I have just relocated to a new place in 
>>> Arcadia,
>>> Michigan and there are neighbor rules and regulations that I must
>>> consider. But I am one to always push the envelope a bit.
>>>
>>>  I was surprised that Don felt that a rigged mast was only around 200
>>> pounds.  Does anyone on the list have other estimates of the weight of a
>>> fully rigged Alberg 30 mast? I thought that it was heavier.
>>>
>>>  Michael
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>>
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>
> _______________________________________________
> These businesses support your Association:
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> Please support them.
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