garrett
Supporting Sponsor
See above. ^^^:ylsmoke: I actually corrected my statement a few posts later to reflect this. ie. the Hi Lift pin being the weakest part of the set up.
newbie hi lift questions
- Thread starter neverestablished
- Start date
See above. ^^^:ylsmoke: I actually corrected my statement a few posts later to reflect this. ie. the Hi Lift pin being the weakest part of the set up.
Garrett, Garrett, Garrett....
Better yet, buy a grade 80 chain. They are proof tested for overhead lifts - 7100 SLL, (tested close to 4 times that I believe for minimum failure). Grade 70 is often called "transport chain", it only tests to around 6500lbs. And grade 80 is only a few bucks more as well!
PS - As has been said before I think: chain WILL stretch - overhead lifts can get as much as 20% out of a grade 80. (Granted, we're not overhead lifting but it goes to show ya', elastic force effects EVERY part of your rig!)
You're right 7WT - poly straps are slick! I've got a 10 foot tree strap in poly from 4X4.
Better yet, buy a grade 80 chain. They are proof tested for overhead lifts - 7100 SLL, (tested close to 4 times that I believe for minimum failure). Grade 70 is often called "transport chain", it only tests to around 6500lbs. And grade 80 is only a few bucks more as well!
PS - As has been said before I think: chain WILL stretch - overhead lifts can get as much as 20% out of a grade 80. (Granted, we're not overhead lifting but it goes to show ya', elastic force effects EVERY part of your rig!)
You're right 7WT - poly straps are slick! I've got a 10 foot tree strap in poly from 4X4.
michaelgroves
Explorer
I understood your statement to mean "of those things not intended to break, if something does break, best if it's the strap/rope. Which does indeed make sense. However, of course if there's a shear-pin anywhere, or other safety valve, then that's second choice - first choice being reaching the stall-out limit of your pulling device!
garrett
Supporting Sponsor
java
Expedition Leader
here is some interesting reading on the subject of safety and recovery. lots of info on strenght ratings on chain/wire rope/synth rope
http://www.pirate4x4.com/tech/billavista/Recovery/
on the original topic id go for the 60" extreme
http://www.pirate4x4.com/tech/billavista/Recovery/
on the original topic id go for the 60" extreme
Just to add some tech to this thread
When you are lifting a car off of people in their bed make sure to leave the handle in the up position. LOL
What the....????
7wt
Expedition Leader
No joke, he doesn't have sliders to jack from.
ps, The wording on that was a little tricky. What I wanted to say just didn't come out right.
there are two people under there...A drunk driver smashed into the house and ended up on top of a young couple. They spent 45 min with hot fluids dripping on them before the fire dept was able to get them out from under it using Highlifts and air bags.
http://today.msnbc.msn.com/id/33477950/ns/today-today_people/
Antichrist
Expedition Leader
That's scary, given how unstable hi-lifts are at the best of times. I'm surprised the FD didn't have something better to lift it with.
Don't really want to second guess, especially since it's hard to tell things by the photo, but it seems it would have been safer to run a chain underneath connected to the hi-lifts so there was less chance of the car slipping off and landing on the couple again.
Having been a firefighter I know there are always times you look back and realize a slightly different method would have been safter.
Don't really want to second guess, especially since it's hard to tell things by the photo, but it seems it would have been safer to run a chain underneath connected to the hi-lifts so there was less chance of the car slipping off and landing on the couple again.
Having been a firefighter I know there are always times you look back and realize a slightly different method would have been safter.