2-post lift floor anchor ??

[Red Goat]

I'm installing a Derek Weaver model W-10DE 10K two-post lift and have some questions. The instructions on these things are not terribly clear, so thought I would get some opinions.

1. The instructions say to torque the nuts by hand to 150 ft/lbs. This seems like an awful lot to me. I don't want to tear the anchors out of the concrete (5" thick, 4000psi mix). The bolts are the expanding wedge type set into a 3/4" hole and the catch end of the bolt is about 3" into the concrete.

2. They included split style lock washers and flat washers with the floor anchors. The instructions don't call out to use the lock washers. I'm wondering if the lock washer would help or hurt the connection. I also wonder if the lock washer changes the torque spec?

Any thoughts on this?

Thanks,
Tim.

 

[UPSHIFT]

I'm installing a Derek Weaver model W-10DE 10K two-post lift and have some questions. The instructions on these things are not terribly clear, so thought I would get some opinions.

1. The instructions say to torque the nuts by hand to 150 ft/lbs. This seems like an awful lot to me. I don't want to tear the anchors out of the concrete (5" thick, 4000psi mix). The bolts are the expanding wedge type set into a 3/4" hole and the catch end of the bolt is about 3" into the concrete.

2. They included split style lock washers and flat washers with the floor anchors. The instructions don't call out to use the lock washers. I'm wondering if the lock washer would help or hurt the connection. I also wonder if the lock washer changes the torque spec?

Any thoughts on this?

Thanks,
Tim.

Red Goat,

They should have supplied you with 3/4" X 5" Anchor Bolts.

If this is correct you can torque the bolts to 90 ft pounds or turn the nut 3 rotations past snug and just be sure they do not come loose. Take the car up 1/2 way on the first lift and re-check to be sure the bolts do not come loose.

I have not seen an anchor bot with a lock washer so I would not use them.

Most anchor bolts have a flat washer.

If the lift does not have a top beam be sure to be very care full as the bolts have more tension on them than a regular open floor 2 post lift.

TIPS..

* DO NOT USE A IMPACT GUN
* DO not over tighten to the point there are more than 4 threads coming
out of the top of the anchor nut.

Cheers to Safe Lifting..

 

[BDAZSVT]

I torqued mine to 150 ftlb as speced by Rotary. I will say it is a pain to pull 150 ftlb 3 inches above the floor.

 

[Average_Joe]

Damn, that is a good deal

 

[pattenp]

The specs I've seen for 3/4" anchors say to torque to 150 ft lb to set the anchors and then maintain at 80-90 ft lb. Turning the nut 3 rotations past snug is not the way to do it. You need to set the anchor to the proper torque using a torque wrench.

The suggestion of not over tightening to where no more than 4 threads are showing above the nut is improper. Depending on when the anchor grabs tight in the concrete and reaches proper torque you may have more than 4 threads showing. You just don't stop torquing when you get to the point that 4 threads show.

Red Goat,

They should have supplied you with 3/4" X 5" Anchor Bolts.

If this is correct you can torque the bolts to 90 ft pounds or turn the nut 3 rotations past snug and just be sure they do not come loose. Take the car up 1/2 way on the first lift and re-check to be sure the bolts do not come loose.

I have not seen an anchor bot with a lock washer so I would not use them.

Most anchor bolts have a flat washer.

If the lift does not have a top beam be sure to be very care full as the bolts have more tension on them than a regular open floor 2 post lift.

TIPS..

* DO NOT USE A IMPACT GUN
* DO not over tighten to the point there are more than 4 threads coming
out of the top of the anchor nut.

Cheers to Safe Lifting..

 

[JOHNMAN]

I prefer epoxy anchors in concrete. That is what I used on my Rotary 2-post lift. I did get to 150lb-ft with my clicker torque wrench and it was a large PITA getting grip on my epoxy coated floor.

I would not suggest lock washers on an anchor bolt unless that is specifically a part of the manufacturers' anchor system. The anchor manufacturers are the experts when it comes to using their specific "system".

Good luck.

 

[CamarosRus]

I had very good condition (used) ROTARY asymmetric 2 Post 9000# Two Post installed
a while back by local Rotary dealer. Five anchor bolts on each floor plate.
Some of the bolts will not pull 150#, some do !!!!. We used SIMPSON brand of epoxy with the anchor bolts.

So far Ive only had my MAZDA 6 on lift with no probs

I have 7000# Dodge RAM Cummins Diesel that eventually I would like to lift.

I'm not removing lift, cutting out my 4" concrete and repouring

Any other advice on bolts that have too much thread coming thru nuts. They torque at 90-100#

 

[pattenp]

So you are saying that the anchors start to pull out of the concrete at a torque greater than 100 ft lbs even with them being epoxied? What's the length of the anchor sticking through the nut?

I had very good condition (used) ROTARY asymmetric 2 Post 9000# Two Post installed
a while back by local Rotary dealer. Five anchor bolts on each floor plate.
Some of the bolts will not pull 150#, some do !!!!. We used a well known brand of epoxy with the
anchor bolts.
So far Ive only had my MAZDA 6 on lift with no probs

I have 7000# Dodge RAM Cummins Diesel that eventually I would like to lift.

I'm not removing lift, cutting out my 4" concrete and repouring
Any other advice on bolts that have too much thread coming thru nuts. They torque at 90-100#

 

[Red Goat]

Update...

Thanks for the replys! I spoke with the manufacturer today and they told me to NOT use the lock washers and to torque the nuts down to 100 ft/lbs. and check after the first few uses, than once a month or two depending on usage.

Cheers...

 

[UPSHIFT]

Update...

Thanks for the replys! I spoke with the manufacturer today and they told me to NOT use the lock washers and to torque the nuts down to 100 ft/lbs. and check after the first few uses, than once a month or two depending on usage.

Cheers...

Great to hear Red Goat..

I work for a Auto lift Manufacture and have been ALI/ETL testing lifts for the last 3 months so I have experimented with several bolts.. I have also pulled post out of the ground with 15000lbs and it was due to pulling the anchors up to far when they were set (at 120 ft. lbs.)... I also found that the Import Lifts with Gold Anchors and lock washers are 19mm and they are getting used for 3/4" application.. Does not seem like a big deal however that .05 mm difference can cause the anchor to pull up more than normal when you set them so be sure they are a true 3/4" bolt..

Enjoy your new lift..

 

[Zrxpilot]

I don't claim to know anything about anything but I did install my own two post lift. Used Hilti 3/4" x 5 redheads. Drilled the holes using a shop vac during the drilling process. Used shop vac after the drilling process. Blew out the holes with air compressor air after the shop vac process.

Screwed the nut so 2 threads were showing and pounded them in. Used flat washers. Cranked them down with a 2' breaker bar to tight as a mofo.

Put my jeep on the lift and hoisted it up. Lowered it and amazingly enough was able to get about another 1/8-1/4 turn on each of them.

Have been using it weekly or so and have had my big block 2500 hd on it. No problems. I do check them every once in awhile and now am finding that I get one here and there than can take a bit of a turn.

Take it for what its worth. Its what I did and so far all as well.

Stay away a good couple feet from any man made or otherwise cracks and you should be fine.

Good drill bit works wonders.

 

[pattenp]

So.. a mofo is equal to how many foot pounds. I can't believe the lax attitude some folks are showing to the requirements for setting anchors for a 2 post lift.

.....
Screwed the nut so 2 threads were showing and pounded them in. Used flat washers. Cranked them down with a 2' breaker bar to tight as a mofo.

 

[tomsmith]

Can't you just put an extension onto your torque wrench so you're more than 3" off the floor and then tighten?

You're still tightening to 150lb/ft right?

 

[dkjwall]

Can't you just put an extension onto your torque wrench so you're more than 3" off the floor and then tighten?

You're still tightening to 150lb/ft right?

The more torque you apply to an extension, the more the extension deflects and twists (depending on length, diameter, and composition.) Torque being applied to the nut will be reduced. This is why I never use extensions, or even deep sockets when building engines, or torquing other critical fasteners, but that's a whole other ball game.

 

[rslaback]

The more torque you apply to an extension, the more the extension deflects and twists (depending on length, diameter, and composition.) Torque being applied to the nut will be reduced. This is why I never use extensions, or even deep sockets when building engines, or torquing other critical fasteners, but that's a whole other ball game.

No it won't. Until you reach the actual elastic limit of the extension and the extension starts twisting (and staying twisted), the torque will be the same. The extension very well may start to twist like a torsion bar but that doesn't actually affect the outgoing torque. It effects alignment of the wrench and socket but not applied torque. Where would the torque go? Power in has to equal power out. It's the law.

 

[dkjwall]

No it won't. Until you reach the actual elastic limit of the extension and the extension starts twisting (and staying twisted), the torque will be the same. The extension very well may start to twist like a torsion bar but that doesn't actually affect the outgoing torque. It effects alignment of the wrench and socket but not applied torque. Where would the torque go? Power in has to equal power out. It's the law.

Newtons third law. You are correct, I hate to say it, but I can't argue with the fact that every action has an equal and opposite reaction...


I won't change the way I do things, even if it doesn't make a real world difference. It just "feels wrong" to me, but hey we're all different.

Then again.... There is "law" and there is also "reality".

Derek.