MrFixIt8192
Member
- Joined
- Sep 9, 2024
- Messages
- 5
Hello Garage Journal.
I've decided to take the plunge and order a MaxJax lift for my home garage. I have owned a 5000slx Quickjack for the last eight years and have been extremely happy with it. However, I've lately been working on cars with larger lift points and the 5000 has kind of been retired. I thought about buying a 6000elx Quickjack but then would also need to keep the 5000 and buy the extension frame set.
Anyways, it just made sense to move up to the Maxjax. As it can now accommodate all the vehicles I own with varying lift point spreads without having to have a couple or a few sets of the Quickjack to accommodate spreads from 40" 75". Plus I can sell my QJ locally and recoup some of the cost.
My garage ceiling is 8'3" which allow me to lift the low height sports cars to full height. Other taller vehicles obviously be less.
My questions...
1. Is there any way to modify the new M6K/M7K MJ to have a minimum lift height lower than 24"?
- On the original Danmar units, the lift heights were determined by a steel bar that went through the columns. You could drill new holes in the column to essentially make any lift height that you want. Say if I needed a stop/safety latch height of 12" minimum for a lifted Cayenne instead of the 24" minimum that is standard?
2. What is the preferred product and method for anchoring the columns now a days? Seems like everyone who has used the wedge anchors has issues. Has any one NOT had issues using the included wedge anchors?
- I've made a template of the base plate and drilled 5 small pilot holes where they will be sitting. I measured and confirmed 4.2"-4.5" of concrete where the base plates will be. The inside column will be 10" from the wall and both will be 12" from any cracks or surface imperfections which the overall slab does have some. I am the original owner of the home and we built it 25 years ago so I know it's 3000psi mix.
Speaking with MJ technical, they tell me that the epoxy anchors and included wedge anchors can both be safely be used in a minimum concrete depth of 4.00". Knowing how expoy anchors work, it doesn't seem like putting a 6.25" OAL epoxy anchor into 4.2-4.5" concrete would work correctly? The bottom two inches of the anchor would be in the void below the concrete not epoxied to anything. Plus you'd have to use some type of mesh or foamtto stop the epoxy of just going straight through the hole and into the empty cavity beneath. Again, the technical service rep claimed that their engineering team said that this was safe and OK.
Looking at Wej-it, I see a PS-12 epoxy anchor. I've copied the specs for for the PD58 wedge anchor that MJ includes in the kit, albeit it's not the Wej-it brand but a knock-off with the same specs. The PS-12 has a OAL of 3 & 11/16 with would work fully with the concrete depth thst I have instead of the 6.25" epoxy anchor that QJ sells and also has similar, if not better strength but uses a 1/2" bolt.
EPOXY PS2-12 carbon steel
* 1/2-13 thread
* 5/8 diameter
* 3 11/16 length
* 3 3/4 min embed
* 5/8 drill bit
Fast-set Ultimate AWF (all weather)
4,000 psi 4,000psi
15,110 13,110
WEDGE PD58
* 5/8-11 thread
* 5/8 diameter
* 3 13/16 length
* 3 3/4 min embed
* 7/8 drill bit
Allowable 3,000psi
Tension Shear
2220 2970
Ultimate 3,000psi
Tension Shear
8800 11880
Allowable 4,000 psi
Tension Shear
4125 2970
Ultimate 4,000 psi
Tension Shear
16500 11880
I've decided to take the plunge and order a MaxJax lift for my home garage. I have owned a 5000slx Quickjack for the last eight years and have been extremely happy with it. However, I've lately been working on cars with larger lift points and the 5000 has kind of been retired. I thought about buying a 6000elx Quickjack but then would also need to keep the 5000 and buy the extension frame set.
Anyways, it just made sense to move up to the Maxjax. As it can now accommodate all the vehicles I own with varying lift point spreads without having to have a couple or a few sets of the Quickjack to accommodate spreads from 40" 75". Plus I can sell my QJ locally and recoup some of the cost.
My garage ceiling is 8'3" which allow me to lift the low height sports cars to full height. Other taller vehicles obviously be less.
My questions...
1. Is there any way to modify the new M6K/M7K MJ to have a minimum lift height lower than 24"?
- On the original Danmar units, the lift heights were determined by a steel bar that went through the columns. You could drill new holes in the column to essentially make any lift height that you want. Say if I needed a stop/safety latch height of 12" minimum for a lifted Cayenne instead of the 24" minimum that is standard?
2. What is the preferred product and method for anchoring the columns now a days? Seems like everyone who has used the wedge anchors has issues. Has any one NOT had issues using the included wedge anchors?
- I've made a template of the base plate and drilled 5 small pilot holes where they will be sitting. I measured and confirmed 4.2"-4.5" of concrete where the base plates will be. The inside column will be 10" from the wall and both will be 12" from any cracks or surface imperfections which the overall slab does have some. I am the original owner of the home and we built it 25 years ago so I know it's 3000psi mix.
Speaking with MJ technical, they tell me that the epoxy anchors and included wedge anchors can both be safely be used in a minimum concrete depth of 4.00". Knowing how expoy anchors work, it doesn't seem like putting a 6.25" OAL epoxy anchor into 4.2-4.5" concrete would work correctly? The bottom two inches of the anchor would be in the void below the concrete not epoxied to anything. Plus you'd have to use some type of mesh or foamtto stop the epoxy of just going straight through the hole and into the empty cavity beneath. Again, the technical service rep claimed that their engineering team said that this was safe and OK.
Looking at Wej-it, I see a PS-12 epoxy anchor. I've copied the specs for for the PD58 wedge anchor that MJ includes in the kit, albeit it's not the Wej-it brand but a knock-off with the same specs. The PS-12 has a OAL of 3 & 11/16 with would work fully with the concrete depth thst I have instead of the 6.25" epoxy anchor that QJ sells and also has similar, if not better strength but uses a 1/2" bolt.
EPOXY PS2-12 carbon steel
* 1/2-13 thread
* 5/8 diameter
* 3 11/16 length
* 3 3/4 min embed
* 5/8 drill bit
Fast-set Ultimate AWF (all weather)
4,000 psi 4,000psi
15,110 13,110
WEDGE PD58
* 5/8-11 thread
* 5/8 diameter
* 3 13/16 length
* 3 3/4 min embed
* 7/8 drill bit
Allowable 3,000psi
Tension Shear
2220 2970
Ultimate 3,000psi
Tension Shear
8800 11880
Allowable 4,000 psi
Tension Shear
4125 2970
Ultimate 4,000 psi
Tension Shear
16500 11880