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Posted By Dec39
I have been asked to do an outline method statement ref; Demolishing a concrete base , I have just realized this work will take place near (3metres) 2 no propane tanks, to carry out this work we will be using a breaker mounted on an excavator without doing loads of research can any one give me some quick pointers about regulations for this type of activity and what control measures I will need to implement
Thanks in advance
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Posted By Bob Youel
the risk assessments should give you all that you nee and they should be in place before the method statements
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Posted By Dec39
Bob Thanks for pointing out the obvious, perhaps I wasnt very clear. Im asking for some quick pointers from somone who may have had some experience of this type of activity,to help me along
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Posted By Peter MacDonald
Hello
Couple of things to consider.
Will the break up or removal of the concrete affect the stability of the propane tank.
What is the condition of the tanks. Could concrete fly puncture them.
The chisel on the breaker may create sparks so is there any chance of fume build up from a tank vent, or spillages in a bunded area.
Consider a charling valve and spark arrestor on the excavator. (maybe excessive though)
Consider creating a physical barrier between the tank and works. Heras fence with debris netting for example.
You would really want to create a controlled 'active zone' for the excavator to work in with a banksman.
The Method statement should state from where the concrete shall be broken out and in what direction works should progress in such a way as to minimise risk of contact between excavator and the tank.
Use an experienced machine operator who has used a hammer attachment before.
The broken out concrete will need to be removed. It will prob contain re-bar that may protrude and provide a piercing hazard to the tank. Again think about where the excavator will be sited and it's slewing radius.
There's prob more but that's a starter for ten.
Pete
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Posted By Goalie
Don't forget to also consider things like
- Any pipework that is attached to the tank (and any other local utilities)
- The need for local area gas monitoring
- Potential vibration issues from the breaker
- Obvious noise issues
- Emergency response for cold burns if (god forbid) a worst case scenario did happen
Goalie
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Posted By Dec39
Thanks both for your imput, Much appreciated.
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Posted By Peter Zunda
Depends on the capacity of the LPG vessels for
safe zoning from sources of ignition, your LPG supplier will be able to help.
For example, 1tonne (2000litres & below) should be 3m from sources of ignition. Although this refers to permanent sources of ignition, it would be prudent to allow for the temporary but significant risk from the demolition process.
As suggested, protecting the vessels and pipework from damage from debris would need to be factored in.
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Posted By Steve M Granger
what an interesting thread thanks all for such constructive (ha ha) replies,
No wonder they ask quetions like this in the exams,
..... think I need to study bit more....
Steady Steve
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Posted By peter gotch 1
Dec
This is a great example of when this forum does best, and does not (at least so far!!) descend into discussions about posters' competence or vice versa).
I may have almost as much competence when it comes to construction H&S as Peter MacD, but I would not have a fraction of his knowledge as regards demolition.
To add to/reinforce what he has already advised, a primary concern should be consideration of the vebaration impact on the LPG starage - as indicatd above your suplier should be able to advise on safe operating parameters.
Happy hunting,
P
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Posted By Phil
If its only 2m square, I would trial dig down the side of it to establish the depth. Even if its 300mm deep it will only weigh about one and a half tonne allowing for a bit of reinforce ment.
Resin anchor a lifting eye in each corner, test the anchors for pull out, and lift it with a decent size excavator. You will have to expose it to its full depth on all sides by hand just to make sure none of the gas pipes, or any thing else run through it.
Once you have hand dug to full depth there will be no sticktion from the sides, just a little from the underside. You can then put in a dumper, and break it up in a safe area at your lesiure.
Hilti do decent chemical anchors that ive used for just this job in the past. Just make sure you check for other buried services running through or near the slab!!
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