1000X1000 Tilers
Rusty Wall

Corrugated Iron

Septic Tank

Yellow Panel

Rust

Peeling Paint

Metal Floor

Beaten Panel

Box Car

Peeling Panel

Special Case
Lock Up

Wooden Door

Metal Beams

Panel

Grill Alpha

Metal Beams
I wasn't going to include this one because I thought it wasn't very versatile. However then I thought, used in the right circumstances it can be very effective, so here it is! The reason it's not versatile is because the gap between the too beams is just black colour, so if you got too good a look at it in a scene, the illusion would easily be ruined. Therefore I would suggest using this in the distance or in poor light. The other option (as shown in the Box Car example image) would be to boolean the gap out of it, or even crop the texture yourself to give yourself two seperate beams.
I don't know what on earth this is a picture of, but it looks industrial! You can see here that the texture tiles easily horizontally.