the second part 53 of lever means 44 is on the other side of the trap from that shown in fig6 and 7 the embodiment of fig8 to 10 is of particular application where the first frame 4 and the second frames 6 are trapezoidal in section as claimed in my u s pat no 3 760 531 issued sept 25 1973 in the trap of fig8 to 10 there is a lug 200 formed on the first jaw forming side 8 of the first frame 4 lug 200 may be attached to side 8 by for example welding a foot plate 202 is pivotally attached to the lug 200 by rivot foot plate 202 terminates at one end in a contact surface 206 there is a catch 208 formed on the first side 8 of the first frame 4 a lever 210 is pivotally mounted by loop 212 to the second end 22 of the second frame 6 lever 210 extends downwardly from loop 212 when the trap is in the set position to engage a recess 214 formed in the lug 200 this set position is illustrated in fig9 the illustrated trap is formed with a safety bar 216 that is attached for example by welding to a plate 218 that also pivots on rivet 204 saftey bar.