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No you are correct and some are indeed 150 to 200mm thick, just more of an FYI with modern building techniques.

I have guns in mine, you will never ever see a rifle at the same time you see bolts and ammunution at my place, theyre both locked up or its one or the other. I simply will not risk it in the middle...

Not these days with steel deck systems, place Im working at now would go as low as 70mm in some spots, thankfully the floor above hadnt been tiled yet.

I think last place I did deckwork on our...

So did your Nephew actually fail and have to attend another course OP?

Thats still eventually downwards in what like a 3 kilometre radius.

I think they are deliberately confusing to get people thinking about safety.

If you listen to the seminar all questions are addressed in detail, its just a matter of reciting what the instructor has said I guess.

The guys running mine I just did in November said it was in...