Yesterday, I did job from my company to transfer pre assembly module from workshop II (closed workshop) onto workshop IV (open workshop). The transfer was required since assembly will be done in the outside of shop. Overhead crane capacity in our workshop is not adequate enough to lift completed module. The completed module has approximately 200 tons weight. So, we separated it onto 4 parts. Every part will be collected and assembled outside of workshop II.
The transferring process was done successfully. Some people might say it just small things. The smallest part only 25 tons. And yeah, we did it so many times. But how if the shackle suddenly broke and the people who under estimate the process dancing below it when the module is being lifted? I believe, even with 0.5 ton load lay on your head could be serious problem for your life :p. So I prefer not to belittle this lifting activity 🙂
I noted there are some definitions we must remember before we do lifting activity.
- Minimum breakload : the load at wire which actually break
- Lifting equipment/device : From Lifting Operations and Lifting Equipment Regulations 1998 (LOLER), lifting equipment means : any equipment used at work for lifting or lowering loads, including attachments used for anchoring, fixing or supporting it. In this case, I used 2 cranes as lifting equipment . The other examples for lifting equipment are: Hoist, fork lift truck, mobile elevation platform, gantry etc.
- Lifting gear/Lifting tackle/Rigging : generally this are the equipment we put below the hook. I used slings and shackles as lifting gear for this operation. The other examples are : eyebolts, snatch block, wire rope, etc
- Lifting point : the point on the structure, which lifting gear or rigging is attached/connected
- Hook point : yes, hook point 🙂
- Safe Working Load (SWL) : the permitted load that you can lift. Maximum allowable load. This load may be equal with Work Working Load (WWL) but never exceed it
I will write for the transferring step in the next note. You can see the lifting and rotating process in the picture below. It was small cute module, but lovely isn’t it 😀