Resupply area

From TF2 Wiki

The Resupply Area is the room in which you spawn/respawn on a Control point map and the room you enter upon leaving the Respawn Area in a Capture the flag map. In capture the flag matches, the point where you respawn is randomly chosen, but in control point maps it's determined by the points your team has control over. A resupply area is one of two places where you may change your class without committing suicide.

A resupply area contains one or more supply closets, which instantly provide full health, metal and ammunition upon opening. To open a supply closet, the player must simply walk into it. However, resupply closets cannot be opened during sudden death. The other usage of a resupply area is as a safe refuge within your own base, as players from the other team may not enter it. Be warned however, as they can shoot through the doorway if it is open (Although a demonman's grenades and stickybombs cannot, usually). Players from the opposing team are also able to enter your resupply area during humiliation. Oddly, you can also enter theirs during this time as well.

Other objects within the resupply area may include lockers in which the various classes keep their personal belongings, lifting weights and targets for practise.