[Yetti]

Hey there G man. I am not here to agrue, but I have some info that would help if you want me to post it. I actually have a chart(s) in my wrecker driver certification book that give tables for resistance while doing recovery. its some pretty good stuff, so I hope you would like more info. if everything goes smoothly tommorow I will be a Certifed Wrecker Driver to go with my many other licences.

 

[Yetti]

Here is a work sheet chart to help with calculations to over come resitance in a pull. you have to observe each axle to know how to figure load. use the chart to give each axle a % of resitance and then you can gauge the pull base on it and the axles estimated weight. add the axles on the second page which is the work sheet with an example to help you figure restance load

use the center section of the above chart to start out with. just assmue the car is on a level surface to figure out how to use it.

I'll check back later to see if you figured out how to use this chart.

 

[Yetti]

http://secure.cartsvr.net/catalogs/catalog.asp?prodid=342664&showprevnext=1

if you want to cheat and buy a nice recovery calculator have at it.

 

[Yetti]

that is the worst picture ever! I can only hope no one died or was injured.

 

[Yetti]

here is the cable & chain selection charts. hope it helps

 

[Yetti]

Very nice thread marv. I have heard that it is better to attach tow points with Grade 5 rather than Grade 8 bolts because when pushed grade 5 will stretch while grade 8 will just clean shear off. Any comments? It's always concerned me some, so I use one grade 5 and one grade 8 on each point.

I can help here. if you know the spec there are shear and pull loads for all bolts. the highest shear load is Grade 8 as a standard bolt, then a 5-6. the idea being the shear load can hold many times the thickness of the bolt.

to give you an exsample a 3/8 grade 8 shears at about 4400lbs. a grade 2 is about 1600lbs. the best grade 2 even at 1" thick only holds back 5500lbs of shear. so if you plan to do anything in the chassie use grade 8's. anything on the suspension use grade 5's. they absorb much more impact before they will shear.

 

[Yetti]

by the way Marv I finished up my wreckmaster training today... you really need to take that class. it could even teach an old dog like you a few tricks.

 

[Yetti]

:tonka: he is wreckmaster Certified :tonka:

sorry I missed that. I must have skipped over it the other day when the thread started.
I finished up the 2/3 training today. so the next level will be out to our shop in the fall. the teacher was outstanding for his knowlage of recovery operations.

 

[Yetti]

http://www.niagarafrontier.com/accident.html

Hey Gman, read this and see if your barge is listed here. I was told it was removed in 2001 , that is why the lake levels have dropped about 4 feet.