Date: Tue, 28 Dec 2010 11:17:03 -0700
Reply-To: Tom Buese <tombuese@COMCAST.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Tom Buese <tombuese@COMCAST.NET>
Subject: Re: ebay Vanagon with extra headroom - poptop only - no roof.
In-Reply-To: <3594FC45-51DD-4F32-9594-1723DA28CD51@shaw.ca>
Content-Type: text/plain; charset=us-ascii
On Dec 28, 2010, at 11:11 AM, Alistair Bell wrote:
> Ah, but Tom, it is welded in.
>
> Maybe you are thinking of the exposed U-channel cross piece that you see when looking up from rear seat.
Yes
> There is another beam though, welded to both sides of van body.
Thanks,
Tom
>
> alistair
>
>
> On 28-Dec-10, at 9:34 AM, Tom Buese wrote:
>
>
> On Dec 28, 2010, at 9:45 AM, Alistair Bell wrote:
>
>> the westy's cross brace has its analogue in the tin top van. A box section cross beam at the point just aft of where the sunroof would go. In both cases i believe the cross brace is needed for torsional stiffness in the body
>
> Unless that cross brace is welded in, it doesn't add any torsional stiffness to the body- a "moment resisting connection" would be required to transfer that stiffness to the body & if the brace is only siting on a lip in the opening, it is only supporting axial or gravity loads on it.
>
> Mr. BZ-licensed architect who can legally design some structural members, but uses much smarter structural engineers to do that instead
>
>
>> (and as mentioned, to support forward end of westy bunk plywood). In the tin top, the beam is curved to match roof curvature, in the westy its not.
>>
>> Both van types have box section cross beam at forward end of roof opening area.
>
> yep, that box section is what provides the torsional stiffness around the opening
>>
>> alistair
>>
>>
>>
>>
>>
>> On 28-Dec-10, at 8:10 AM, Thomas Buese wrote:
>>
>> In my professional experience w/ structural engineering, I believe
>> that the Westy cross brace in the ceiling is more for the structural
>> support of the upper bunk than for cross bracing the roof-sunroof
>> models don't have that brace, right Craig?
>>
>> YMMV,
>>
>> Mr. BZ-you can never have too much headroom, but where do you store
>> your stuff?
>>
>>
>>
>> On Dec 28, 2010, at 7:40 AM, craig cowan wrote:
>>
>>> Ahh. I guess they did pull out some structural stuff.
>>> In that case, it may be somewhat compromised. How much? It's hard to
>>> say.
>>>
>>> -Craig
>>>
>>>
>>> On Tue, Dec 28, 2010 at 12:05 AM, Loren Busch <starwagen@gmail.com>
>>> wrote:
>>>
>>>> On Mon, Dec 27, 2010 at 7:30 PM, craig cowan
>>>> <phishman068@gmail.com>wrote:
>>>>
>>>>> It's only missing the top bunks right? They're not structural....
>>>>> So, "YES"?
>>>>>
>>>>> It looks good!
>>>>> If you don't use your top bunks, that looks slick!
>>>>>
>>>>
>>>> BUT it is missing all the sheet metal part of the top in that area
>>>> and
>>>> maybe more important the very beefy cross brace at the front of
>>>> the bunk
>>>> the VW/Westfalia put in.
>>>>
>>
>
>
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