So this thing is just a big square each of the walls supports different breaching training. Descriptions of the pictures work top-bottom in order with the pictures.
Ram door is heavy as hell and small birdlike men and ladies have trouble moving it with nothing. We can add up to five dowels or copper tubing to vary difficulty.
Ballistic breaching doors get pre-made hinge props or dead volts slid into the spot. Back side has a pin to hold the wood in place. The business side has a steel lip and a pocket to catch backside frag. The pocket bottoms are open so all the debris falls out.
The hinges on the pry doors have big ass springs in this de the square tubing, so the whole door shifts when you pry the halligan down. You can also add 1X2's to the other side to toughen it up.
Quickness saw door just has steel rod going through to simulate a deadbolt. The handle just cranks down to hold the rod in place so it doesn't spin.
Combo door that can take hinges, a deadman and a steel rod, we quickie saw through all of it.
Last picture is the thing we just built to hold up chain link. Hang a section and you can get multiple cuts. The 2X4's are just screwed in to hold the chain link up. Cordless drills rule the day but it goes fast with the chain link pre-cut in the right width.
The prop also has a window opening that we can quickly hang any window in for port and cover/break and rake. The south wall has a U-shaped notch along the bottom and a hinged U shape at the top. You can build some quick walls with 2X4 studs, T-111 and sheet rock and then place the bottom in the U. Push it up and then the hinged top clamps down to hold the wall in place for gun port shots or chainsaw work.
We don't typically use explosives on this, we find buildings that are going to be demo'd and do most explosive breach training there.
Let me know if you need more detailed photos or measurements.