What is the working load limit for Lock-N-Lift tools?
All Lock-N-Lift tools are designed with a working load limit of 4 tons or 8,000 pounds.
Where is the working load limit marked on Lock-N-Lift tools?
The working load limit is cast into our #500B weld-in plates.
How large of a road plate can I lift with Lock-N-Lift tools?
Here is a table of the weight of common road plates based on their size.
| PLATE SIZE | WEIGHT |
| 5′ X 12′ | 2,500 lbs. |
| 8′ X 12′ | 4,000 lbs. |
| 8′ X 16′ | 5,333 lbs. |
| 8′ X 20′ | 6,665 lbs. |
A center mounted Lock-N-Lift tool can comfortably handle an 8’ X 20’ road plate.
Can I use Lock-N-Lift tools on plates larger than 8’ X 20’?
For larger plates, we recommend using two tools equally spaced along the long dimension of the plate.
See our Applications page for an example of a two-tool setup.
What is the welding procedure for Model 500B weld-in plates?
We strongly recommend that certified welders in compliance with all local regulations handle all welding.
The #500B weld-in plates are made from WCB steel for easy welding into road plates made of A36, A50, or A992 steel.
Please see the Model 500B technical page for welding instructions.
What weld filler metal do you recommend when installing weld-in plates?
The weld wire that is typically used is a 7018 rod when stick welding, or a Metalshield MC-6 rod when machine welding.
Which lifting tool is right for my needs?
All Lock-N-Lift tools have the same working load limit, so the decision on which tool to use is based primarily on how you want to attach the tool to your hydraulics.
If you want to use an anchor shackle to attach to a tool, then the Model #750 is a good choice.
If you want to be able to use a locking hook to attach to a tool, then the Model #800 is needed.
Lock-N-Lift sells chain assemblies for its tools for your convenience – please see the Products page to view the different tool attachment options.
What size shackle or hook do you recommend for attaching Lock-N-Lift tools to a hydraulic lift?
The through hole on the Model #750 tool will accept a shackle pin up to 1” in diameter.
The slot in the Model #800 tool will accept a maximum hook width of 1 1/8”.
All shackles, hooks, and chains must have a working load limit of at least 8000 lbs.
Do you have a question that wasn’t answered above? Send us a message and we’ll get right back to you.