Fwd: Re: NAC, but wrenching content

[krbarry at bellatlantic.net]

>
>Stop risking your life with those cheap pieces of ----. Do what I 
>did instead. Get some lumber 2x12s and build yourself a couple of ramps.
>Take one piece 60 inches long, cut a 45 degree angle in one end the 
>long way such that when the board is lying flat this bevel serves as 
>a steeply raked edge.
>Do the same with another board 50 inches long. Screw that one on top 
>of the first one such that the edges not cut line up and now the top 
>board's cut edge is ten inches back from the first one.
>Keep this up for four or five boards depending on the desired hight.
>Now you have much stronger and safer ramps with the added advantage 
>that they are not as steep and thus are easier on your clutch and 
>can easily clear a low air dam.
>KB
>
>At 11:08 PM 3/19/2006, you wrote:
>
>>The deformation of the U's has compromised the strength of that section,
>>the U serves as the "beam" in what amounts to a "post and beam" structure.
>>
>>Since the beam has been compromised at the very least in lateral load
>>strength
>>(from 1.5" to 1/4"), the ramp is not safe. I don't know if the material
>>would get
>>work hardened in an effort to re-form it to it's original shape, but it's
>>probably not
>>worth the risk, considering how relatively inexpensive ramps are. AND
>>considering
>>how much your life depends upon them.
>>
>>My vote, into the dumpster.
>>
>>LL - NY - ex-mechanical engineer and current Physics teacher.
>>
>>On 3/19/06, Andrew Buc <AndrewBuc at staxman.net> wrote:
>> >
>> > For a few years I've had a pair of stamped sheet-steel ramps that you
>> > can drive a car onto in order to get one end in the air w/o jacking it
>> > up. If you took a cross-section of the ramp at most points, it would be
>> > like this:
>> >
>> >   _______
>> > U       U
>> >
>> > The tire rests on the flat surface between the U-shaped sections (which
>> > are shown upside down above). I've roughly eyeballed the U-shaped
>> > sections at 1.5" wide x 2" high. On one of the ramps, one of the
>> > U-shaped sections has been deformed so the straight parts of the U are
>> > about 1/4" apart, and not quite parallel. This is at the place where
>> > the cross-section actually rests on the ground, at the opposite end
>> > from the gently sloped end that you drive the car onto. I'm sure I
>> > could insert a tool and spread the sides out to their original width,
>> > or close to, but would the ramp then be dangerous to use? Is it
>> > dangerous to use now? If the answer is yes, they're going straight in
>> > the dumpster. TIA
>> >
>> > _______________________________________________
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>> > quattro at audifans.com
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>> >
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>>
>>
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>
>
>
>                                         Kevin Barry
>                                         krbarry at gmail.com
>"Those who would  give up essential liberty in order to purchase a 
>little temporary safety deserve neither liberty nor safety."
>   Benjamin Franklin



                                         Kevin Barry
                                         krbarry at gmail.com
"Those who would  give up essential liberty in order to purchase a 
little temporary safety deserve neither liberty nor safety."
   Benjamin Franklin


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