OT - RE: [TheForge] Re: Gazinta (Re: shuttle)

[Jeffrey Polaski]

> [1] Why are manholes round?
Because the hole *underneath* them is round ;-)

>From what I hear, there are square manholes, and their covers,
coincidentally, are square too... When I read the manhole question, it
reminded me of this whole thing from a book about Richard Feynman, where
he gets into a long list of reasons about why manhole covers are round,
and none of them is the "correct" answer ("so it won't fall in"). I
remember it being an especially enjoyable part of the book  (although I
don't remember what book it was).

Well, any ways, back to lurk mode...


Jeff Polaski
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-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Steve Smith
Sent: Monday, August 08, 2005 6:30 PM
To: mspencer at tallships.ca; Sponsored by ABANA
Subject: Re: [TheForge] Re: Gazinta (Re: shuttle)


I don't mean to tell you it can't be done; I'm eagerly awaiting your 
results.

Steve

Mike Spencer wrote:
>>So Mike, are you going to add a floor pocket to an existing concrete
>>floor? This sounds improbable. How?
> 
> 
> Oy!  So Steve, is this one of those things that can't be done?  I 
> don't *know* how I'm going to do it.
> 
> Off the top of my head, where vague thoughts have been fluttering like

> bats...
> 
>    Drill 4 holes straight through 6" of floor.
> 
>    Rent a lightweight air hammer and cut out the plug, maybe 1 or 2
>    inches oversize.
> 
>    Gouge out some of the compacted fill underneath a bit wider than
>    the hole.
> 
>    Make a steel sleeve from 1/4" plate to accept the 4" HSS post.
> 
>    Vibrate some cement into the hole, up to the underside of the
>    existing floor.
> 
>    Put the sleeve in place and fill around it with pour-rock or
>    similar product.
> 
> I can think of variations.  E.g., the sleeve has a bottom with a 1" 
> hole.  Drive a 1" stake down through the hole as far as possible and 
> then weld the stake into the sleeve bottom.  Um.. 4 such stakes? 
> Um...or a couple of strips of 1/2"x1-1/2" that are longer than the 
> hole is wide [1]; get them in place under the floor and set into the 
> fresh concrete leaving a 1" gap.  Weld them to the sleeve and put the 
> stake down between them. Um....
> 
> I dunno [2].  If you've tried this and it didn't work, what should I 
> not do?
> 
> 
> BTW, I was using the big vise tonight for the firt time.  Forging a 
> gargoyle doorknob on the end of 2" round.  The workpiece never moved. 
> The screw is a litle sticky when tight but I suspect it will wear in 
> after a while.
> 
> - Mike
> 
> [1] Why are manholes round?
> 
> [2] Dang, where is Bugs Bunny and his portable holes when you need 
> him?
> 
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