Thats cool was just curious thats all. I wasn't thinking they were transporting spent nuclear rods or anything.

Was just alarmed/curious about the effects those materials may have in a crash situation but plenty of planes have crashed before and nobody ever seems to mention flammable freight as an issue.

At least I now have correct info re: DG's on aircraft, I always was of the impression that was a sea freight type of job.

All DG's being transported by air have to meet IATA guidelines for transportation,packaging, labelling etc have a look at www.dgsafety.com.au and that should provide some info on it for you.

DG's are all catagorised and classed so some cant go with others etc and their are limits on how much can be put in each compartment example is dry ice cant exceed 100kgs per compartment it was 50kgs up until recently but it has been increased, other example is if you have any DG they ideally need to be placed at the furtherest compartment from the cockpit, also what is known as a NOTOC is filled out so the captain knows what DG's he has onboard and what compartments they are loaded into.