After two questions on how to make trapdoors I decided to make a small testmap with a trapdoor. The trick is to make a it the same as a normal rotating door (only on the ground) and then press "N" and tick either the X-axis or Y-axis box (depending on over which axis you want to rotate the trapdoor)
yeah.. that works.. but it rotates in the center.. if u change the valeu of spawnflags to 4. then it will work along the edge like a hedge to a basement orso.. but thanks.. u pointed me in the right direction