From: Ray O on

"B A R R Y" <beech23pilot(a)yahoo.com> wrote in message
news:7r0Si.3025$LD2.2207(a)newssvr17.news.prodigy.net...
> Built_Well wrote:
>> The 2 tires you have off the ground are on
>> the same side of the vehicle--another no-no, according
>> to the instructions on the jack stand box I read at
>> Walmart/Sears.
>
> zzzzzzzzzzzzzzzzzz...
>
> I single point jack my '05 4x4 Tacoma at the Access / Front door gap every
> time I rotate tires.
>
> Lug nuts are loosened and torqued on the ground, the parking brake is set,
> and the opposite wheels are securely chocked with a total of 4 chocks.

One of the advantages of having a body-on-frame construction is that the
frame rail provides obvious places to place a jack, something that is
apparently not as obvious on monocoque construction.
--

Ray O
(correct punctuation to reply)


From: Built_Well on
Yesterday, I saw an AutoZone sales guy shopping at
Harbor Freight, and an O'Reilly Automotive sales guy shopping
at Walmart. Don't those guys get discounts at their own
stores? Kinda funny.

O'Reilly has competitive pricing. It often beats
AutoZone, and sometimes even undercuts Walmart, like
on a pair of 8,000-pound Rhino car ramps for $33 while
Walmart wants $35 for a pair of ramps that only
support 6,000 pounds.

The best-made jack stands I've found are at AutoZone
under the "DuraLast" brand, which is AutoZone's own
brand. Saturday, I'll buy a pair of 2-ton DuraLast
stands for $20. Jack stands are cheaper at Walmart but the
better quality, in this case, goes to DuraLast.
Walmart often has good quality, but this time AutoZone's
own DuraLast brand wins.

I also like the DuraLast jack stands because they
offer 2 inches of flat contact surface. The next
best stands only have 1 inch of continuous, unbroken
flat contact surface. If I put the DuraLasts underneath
the double notches of the Camry's side rails, I think the
wider 2 inches of contact surface will help spread
out the weight of the car and may help prevent bending
of the notch seams? I'll have to measure the width of
the contact surface of the trunk jack, a.k.a. the scissors jack
that came with the car. The scissors jack is designed to be
used under the notch seams.

The Duralasts offer the smoothest flat surfaces, too. Very nicely
made stands. And they feature extra-wide feet to help prevent sinking.
A lot of stands still don't offer this feature.

You can buy a pair of 6-ton stands at Harbor Freight right
now for only $20 on sale. That's 6 tons for $20, not merely 2 tons.
Not sure when the sale ends, but that's quite a deal.

Happy shopping.
From: Comboverfish on
On Oct 19, 3:31 pm, "Elle" <honda.lion...(a)nospam.earthlink.net> wrote:
> "Scott Dorsey" <klu...(a)panix.com> wrote
>
>
>
>
>
> > Built_Well <Built_Well_Toy...(a)hotmail.com> wrote:
>
> >>The car ramps available at Walmart are unique. The ramps
> >>are constructed in a way that allows one to fit inside
> >>another.
>
> > I have a set of ramps like that that I've had for about
> > twenty years
> > now. They came from a locally-owned auto parts store that
> > is long gone.
>
> >>Each single ramp can support 3,000 pounds, so a pair would
> >>be good for
> >>6,000.
> >>But if you stack 2 together (one on top of the other), a
> >>set
> >>of 4 ramps can be used to lift the front end tires of
> >>a 12,000-pound vehicle! That's what the stickers on the
> >>ramps say,
> >>anyway.
>
> > I would not believe what the stickers say. Safety margins
> > are your friend.
>
> I would re-read the stickers. What's claimed above fails the
> engineering common sense check. Namely, load supporting
> structures in series ("one on top of the other") can only
> carry as much weight as the weakest link. A pair stacked one
> on top of the other should be safe for 3000 lbs. Three
> stacked one on top of the other is safe for 3000 lbs. Etc

What he's describing is two stands that are designed to fit one inside
the other, for lack of better description. If they worked as you are
describing (one on top of the other), how would you drive on to them?

I wouldn't trust the double ramp design enough to max it out. If one
was to buckle at a high rate of speed there would more momentum
crashing down onto the other one, even if they are only a fraction of
an inch apart from each other. Certainly one ramp has to provide
*most* of the static support until it *can't* anymore. I don't
believe stacking two things together like nesting dolls gives anywhere
near double strength, but I'm no engineer... I'd feel more
comfortable with claims of 1.5X improvement.

Toyota MDT in MO

From: Elle on

"Comboverfish" <comboverfish(a)yahoo.com> wrote
E
>> I would re-read the stickers. What's claimed above fails
>> the
>> engineering common sense check. Namely, load supporting
>> structures in series ("one on top of the other") can only
>> carry as much weight as the weakest link. A pair stacked
>> one
>> on top of the other should be safe for 3000 lbs. Three
>> stacked one on top of the other is safe for 3000 lbs. Etc
>
> What he's describing is two stands that are designed to
> fit one inside
> the other, for lack of better description. If they worked
> as you are
> describing (one on top of the other), how would you drive
> on to them?

He's then allegedly got the "legs" of one ramp spreading
wider than the legs of the one beneath it. It does not make
sense.

No idea how you'd drive onto them. This is also why I doubt
he read the stickers correctly.

> I wouldn't trust the double ramp design enough to max it
> out. If one
> was to buckle at a high rate of speed there would more
> momentum
> crashing down onto the other one, even if they are only a
> fraction of
> an inch apart from each other. Certainly one ramp has to
> provide
> *most* of the static support until it *can't* anymore. I
> don't
> believe stacking two things together like nesting dolls
> gives anywhere
> near double strength, but I'm no engineer... I'd feel
> more
> comfortable with claims of 1.5X improvement.

Just saying: Picture a rope, rated at 100 lbs. connected in
series to a steel cable, rated at 5000 lbs. How much weight
can the rope and steel cable support in series before the
setup fails?


From: jim on


Elle wrote:
>
> "Comboverfish" <comboverfish(a)yahoo.com> wrote
> E
> >> I would re-read the stickers. What's claimed above fails
> >> the
> >> engineering common sense check. Namely, load supporting
> >> structures in series ("one on top of the other") can only
> >> carry as much weight as the weakest link. A pair stacked
> >> one
> >> on top of the other should be safe for 3000 lbs. Three
> >> stacked one on top of the other is safe for 3000 lbs. Etc
> >
> > What he's describing is two stands that are designed to
> > fit one inside
> > the other, for lack of better description. If they worked
> > as you are
> > describing (one on top of the other), how would you drive
> > on to them?
>
> He's then allegedly got the "legs" of one ramp spreading
> wider than the legs of the one beneath it. It does not make
> sense.
>
> No idea how you'd drive onto them. This is also why I doubt
> he read the stickers correctly.
>
> > I wouldn't trust the double ramp design enough to max it
> > out. If one
> > was to buckle at a high rate of speed there would more
> > momentum
> > crashing down onto the other one, even if they are only a
> > fraction of
> > an inch apart from each other. Certainly one ramp has to
> > provide
> > *most* of the static support until it *can't* anymore. I
> > don't
> > believe stacking two things together like nesting dolls
> > gives anywhere
> > near double strength, but I'm no engineer... I'd feel
> > more
> > comfortable with claims of 1.5X improvement.
>
> Just saying: Picture a rope, rated at 100 lbs. connected in
> series to a steel cable, rated at 5000 lbs. How much weight
> can the rope and steel cable support in series before the
> setup fails?

That's a wonderful question but it has nothing to do with how the 2
ramps work. And I would recommend trying to drive a 3000 lb car up a
cable even if it is rated at 5000 lbs.
The difference between your example and the ramps is yours is designed
to fail and the other is designed to work. A better analogy would be 2
dixie cups stacked together will support more weight than one alone.

-jim

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