my current BC strategy for railhouse:
terror:
fall back. it may be easy to rush ahead and spawnkill, but if one dude gets through, yer toast. stay near your base, preferbly in the warehouse or just behind it. GUARD ALL ENTRANCES!!! there have been many times I have been guarding the warehouse entrance and the archway alone. remember, it only takes one person to screw you over. fall back, and use the terrain to your advantage.
*prime defense spots*
in the room beside (to the east, I think) the warehouse, the shelf makes excelent cover for a guy with an AK or a SIG. make sure you have a guard in the room adjacent to it, but KEEP DOWN!! if you stand up in there, yer toast.
that chain-link fence in fromt of your spawn is an EXCELLENT place for a sniper or a half-decent marksman.
The box beside the truck parked in your spawn (just under the west? ramp down) is a great place to cover teh warehouse entrance. get a sniper there, or an AK. *note* if you go sniper there, make sure you are ready to whip out your GLOCK (you need the mag size! trust me!) if someone makes it past you. if you take fire, crouch and lean around.
in the warehouse, the dip in the large stack of boxes is an EXCELLENT ambush spot.
The railyard itself (the covered one) is a great place to go prone and hit the SPECOPS as they run past.
trains and teh gaps between them should be used as much as possible, they are great cover.
in teh archway, hide behind boxes. 'nuff said.
for you TJ'ers:
fun little place if you are ahead: jump onto the railing beside teh room at teh SPECOPS spawn, then go on the lamp. just that simple!
SPECOPS:
BE AGRESSIVE!!!!! when spawnkilling starts, it screws you. it's near impossible to break on this map. unless...
if all of you rush the arch (not the room, too many camping spots.) as a team and go for teh covered yard. assemble there and move in through the warehouse.
watch teh windows, but don't camp them. if you camp, you die. it's that simple.
if you see an opening in thier defense, exploit it. yeah, they'll get more defense there, but it opens another hole!
when assaulting, go as fast as you can. learn to shoot without irons. it helps the sniper fortification.
defense spots:
not that many. the arch can be good cover, but not that great.most of teh terror ones can be used well.
under teh water toer.
this is my fave

stay there, no shooting (get a supressed weapon if you can) then when they get comfy, launch a nade, or go rambo!
that's all I got...
snow coming soon...