Let痴 talk about using double door, powered door, wire trigger (not pan) fired cage traps for beaver. Tell me about the sets you like to make, when you choose to use them when other options are also available, how you usually lure them, how you secure them, and any additional information about them, including problems and mistakes to avoid. Let痴 try to keep it focused on beavers for this one if possible. Beaver cage traps 101, let痴 go.
The easiest set to make using a guillotine doored trap that is at least 14" wide x 17' tall and 32-38" long is two traps side by side in 6 to 8" of water about 5 inches apart. I wire the traps with 16 ga wire on each end about 5" apart. I take grass or weeds and place between the two traps with lure as a scent set. That way when the first is caught the traps stay in position for the next catch. If catching otter, fish may be caged or on a stringer between the two traps. Block off the ends with a clipped branch stuck in the mud. If there is enough room, and many beaver,set them in the shape of a triangle. Best to be out in the water and place muddy grass on top of traps for eye appeal.
The same set could be set perpendicular with scent just outside of run or right in middle of run with or without scent.
The beaver or otter works the trap at an angle with his tail next to the back side wall(14" wide trap). This makes him spin, bringing his tail into the trap when the door falls. The conibear trigger is formed into a "W". The beaver will hit the trigger with his shoulder or try to push through the loop formed by the trigger. If my trigger was a swing bar trigger the beaver would have to go to the left or right more so not allowing as free of movement in the trap. If a 12" tall trap were used the beaver would be less likely to enter because of water depth. If the trap was 18" tall, with the swing bar on its side, movement through the trap would be restricted. The taller trap also keeps the animal from climbing on and over the top. If the doors were lock bar doors that stuck out on the ends the circling beaver would have further to go around to enter the traps. The lock bar doored traps ends would not match in a triangle set.
Or just set in a run in water, on land, or under water.