I've been having problems with a map I'm trying to make, I wanted to do a BTS section with all the catwalks and testchambers, but I can't seem to find the proper class, each time I trying making a prop_ , it just comes up with an error on the compile log whatchamacallit-thing saying something about me needing to make it a $staticprop or something like that. Any help would be appreciated.

When choosing a model, go to the info tab. Anything that has dynamic checked must be a prop_dynamic. Anything with static checked can be either dynamic or static. Anything with physics or physics and static checked must be a prop_physics.