Some of our operatives have highlighted a valid concern. They are required to cut sections of corrugated steel, when doing this with an angle grinder the guard does not allow the blade to penetrate fully through the steel section. (Due to the recess on the corrugation) I'm sure there is another tool on the market that can replace the grinder. Any help would be greatly appreciated.

The disc guards themselves are more for spark deflection than as operative protection". I am not (entirely) convinced about that statement! I have been using these on and off for a great many years. For a start they tend to deflect away from the OPERATOR but generally not others, so in that respect they are "..operative protection". And I suggest that they are also very much there to protect the operators hands from the moving wheel. I personally wouldn't relish using one without the guard in place, I value my hands too much! Not sure if it is the best kit to use to cut 'thin' corrugated steel, but in fairness I don't have another suggestion at this time. In saying that there are allsorts of other pieces of kit that I have used including nibblers, hand held power shears etc but I am not sure if they would be a practical alternative.

The guard is also there in case the disc itself shatters. Which would cause a lot of disc fragments spinning through the air at a rapid rate of knotts.

Stuff - I had to think about that one! But got there in the end! I may be wrong, and happy to be so, but I would have thought that using an angle grinder to cut corrugated sheet metal might be a bit 'snatchy'?

One supposes you are using cutting discs as opposed to grinding discs. Grinding discs used for cutting would be being operated outside their designed range. The guard is there in case the disc bursts or dismounts, otherwise it would be a lot more flimsy than it is. You can get "skil" type cutters for sheet metal, and the same type of tool with an abrasive cutting disc instead of a saw disc.