Hi, i'm making my first map and i noticed, that when i place a grate, then the light bridge can't get through(which is right) but the tractor beam also can't(which is not right). Gel can get through as it should. How can i make the tractor beam getting through?

it makes perfect sense that a tractor beam cannot go through grate. What you can do is turn your grate texture into a func_illusionary or a func_brush which is not solid and put clip (func_clip_vphysics) and player clip over it so then the player and objects cannot go through the grate.