I am building an engine hoist framework, to hang a chainfall. I will be
using it to pull and install engines and trans in my racecar and other
various vehicles. I planned on using 4x4's for the uprights and the top
crossboard. The crossboard, that the chainfall will hang from, will be
10' long. Is a 4x4 strong enough, or should I use a 4x6, or something
else entirely? I figure the engine/trans combos shouldn't be more than
700 or 800#. Plus maybe a momentary higher weight when a mount hangs up,
and the front of the car lifts up a little with the engine. Any
comments/thoughts are appreciated! Thanks, Big E
On Mar 14, 2:10 pm, email@example.com (big e lewis) wrote:
I would suggest that you look for a small A-frame style gantry on
Take a look at mcmaster.com under floor crane to get an idea of what
the design looks like in steel.
Timber is pretty variable material & the strength from piece to piece
can vary a lot.
A 4x4 is way undersized ... a 4x6 is getting closer.
The connection details are very important to performance of the
Wood though easy to work with isn't ideal material for this
Several 100's of pounds of auto components suspended chest high off
the ground is a non-trivial activity that could seriously hurt or kill
someone if it falls.
Lifting systems are required to have substantial safety margin....your
home brew solution, while doable (if you know what you're doing),
could be a disaster waiting to happen.
I'd design for at least 1500#, for example, a Studebaker V-8 weighs over
600 lbs. fully dressed with clutch and bellhousing but without
transmission. I'd imagine if you work on 4x4s you could conceivably
pull an engine, automatic transmission, and transfer case as a unit,
which even with a modern, lightweight engine and trans case could weigh
over 1000# all up. like Bob says, you don't want to find out that you
underbuilt the hard way.
replace "roosters" with "cox" to reply.
Agreed. Stuff That Can Kill You is not the place to cut corners. Used
engine lifts are not that hard to find or expensive, compared to the
doctor bills if you drop it on your foot, or the funeral bills if you
drop it on your head or chest.
A 4x4 will definitely not be strong enough. I have one made up with double
2x8's with a 7 foot width that I have pulled an engine with. I would keep the
width as short as practical. Do not drill the beam to attach the hoist, make a
metal strap to go around, or use a nylon sling wrapped around the beam.
Here is a program that will calculate the bend in a wooden shelf or beam, just
put in various measurements and wood type. Best to size it for ordinary wood:
spruce, pine, etc. unless you can get Douglas fir.
But OP said 10-ft span which would be stretching it by quite a bunch...
I'm w/ the suggestion on looking at alternatives including biting the
bullet and buying a decent-sized beam--amongst other things, would allow
the hoist to be tracked, always a useful enhancement.
If use lumber, would suggest 2-3 2x8 or -10s minimum, but that's simply
a "feels about right" sizing, I didn't even estimate a stress number...
On Fri, 14 Mar 2008 18:10:33 -0400, firstname.lastname@example.org (big e lewis)
1) If you have a large Oak tree - hoist the engine from the largest
2) Drop the engine on the ground, then roll the car back down the
3) Build a T-Pee with three 3" galvanized pipes, assemble the
hoist/with pipe and hoist the engine.
Even then you can never tell. I have several 70' oak trees and one had a nearly
horizontal branch up about 20 feet. The branch was a good 10" thick. Many times
I pondered how I could get some ropes up there for a swing for the grandkids.
One hot summer about 3 years ago, I was walking in the back yard and heard a
tremendous splitting noise, and the entire branch hit the ground with a crash.
I've deleted the previous posts, hence posting here. The way to go for me is
an hydraulic lift on a mobile frame. I bought one probably 25 yrs ago that
has lifted out and in many separate and combined units in safety. At the
time, it costed me about $200 so more now but not that much and worth it!
I don't have a way to post pics, but my garage is 26' wide, 38' deep,
12' tall ceiling. The front rollup door is 16' wide, and 10' tall. I
have an apron in front of the garage 25' out, the full width of the
garage. ( the apron and the garage floor are concrete ) I thought this
setup could be used inside during bad weather, and rolled outside, or
near the door on nice days when I want to work in the fresh air. Big E
My first dealings with the internet, about 10 years ago, was with webtv.
Simple, no viruses, good for basic e-mail and posting. Since then, my
wife got a computer, and since she has service from MSN, I get free
webtv service. So while she does the internet thing on hers, I just play
around on this, since I have it and it's free. I'm not much into
"technology", in fact I just got a cellphone about a year ago. (mostly
because it was given to me from a co-worker who was upgrading, and it is
a virgin mobile for $6.99/month and 10 cents/minute. And I only use
maybe 10 minutes a month at most) As far as the racing, our families
have been it for decades. We've ran everything from demo derbies to
enduros, ministocks to latemodels. My wife, in 2003 won the track
championship, first female ever, at our local paved flat 1/4 mile track.
We both have multiple top 5 and top 10 point finishes in various
classes. Her current car is a latemodel, 13-1 compression, ford 9 inch,
mini clutch, ect. Sorry for the rant, but I take offence when people
assume that every person with webtv is a moron. (many ARE, but that is
beside the point! lol) Thanks for all the suggestions, I'm still
deciding what way to go on this project. I'll let everyone know what I
do, with results when I do. Big E
Ignore the snide comments, it's usenet, afterall...
What puzzles me is if you're into the racing in such a big way you would
even consider anything but a well-built hoist.
You surely must be able to and have all the welding equipment you would
need and a little contemplation and design would allow for a quick set
up and take down assembly using pins, etc., and provide more than
adequate strength w/ less bulky support, etc., in the way...
$0.02, imo, ymmv, etc., etc., etc., ...
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