Buildings

• 

  Sentry Gun

• 

  Combat Mini-Sentry Gun

• 

  Dispenser

• 

  Teleporter

“

...designed by me, built by me, and you'd best hope....not pointed at you. — The Engineer

”

Buildings are machines that can be constructed by the Engineer using his Build Tool PDA. The five available buildings are as follows:

• Sentry Gun
• Combat Mini-Sentry
• Dispenser
• Teleporter Entrance
• Teleporter Exit

By default, an Engineer may not construct more than one building of each type at a time, unless the server permits multiple buildings via a console command. Engineers require Metal to create, upgrade, and repair buildings.

Like players, buildings have health, and are destroyed when their health is reduced to zero. Critical hits do not cause extra damage to buildings. Weapons also do not suffer from damage drop off on buildings; regardless of distance, every hit does the same amount of damage (excluding splash). Damaged buildings will emit smoke and sparks. The Spy can disable and slowly damage buildings over time using his Electro Sapper. The Demolish PDA cannot be used to destroy buildings that are in the process of being sapped.

Buildings are erected automatically after being deployed, but can be built twice as fast by hitting it repeatedly with the Engineer's Wrench during construction. Having more than one Engineer hitting a building under construction stacks the effect. A Building can be deliberately destroyed by using the destroy menu (default: 5). This is useful for recollecting metal, as a building will explode into broken metal pieces upon destruction.

Water does not have any effect on buildings. All buildings in Team Fortress 2 work just as well underwater as they do on dry land. However, a sentry built underwater will not shoot anyone on land (even if they are in range), and vice versa.

Building		Build Time	Cost in metal	Health points	Scrap metal when destroyed
Sentry Gun	Regular	10 seconds	130 (200 to upgrade)	150/180/216	60
	Combat Mini	2.5 seconds	100	100	28
Dispenser		20 seconds	100 (200 to upgrade)	150/180/216	50
Teleporter (entrance or exit)		20 seconds	125 (200 to upgrade)	150/180/216	60

Building HUD

The Building HUD provides at-a-glance information on the Engineer's buildings and the Spy's Electro Sapper. The status of different aspects of the building are indicated by an icon.

Icon	Description
	A number indicating the number of kills a sentry has followed by the number of assists in brackets. (Sentry Guns only)
	An indicator bar representing the percentage left of ammunition or metal reserves.
	An indicator bar representing the percentage of the weapon upgrade progress (Levels 1 and 2 only)
	An indicator bar representing the percentage left of rocket reserves. (Level 3 Sentry only)
	A number indicating the number of teleports a Teleporter entrance has provided. Transforms to a recharge progress bar after a teleport.

Hauling

RED Engineer hauling a building on Upward

The kill icon representing the destruction of a carried building

As of the July 8, 2010 Patch, buildings can be packed up and moved by their owners by pressing the right mouse button while looking at and standing next to them. The operation is istantaneous, and the Engineer will appear carrying the building's toolbox on his shoulder to all players, while from his first-person perspective he will still carry the toolbox as a normal building construction.

It's possible to haul one building at a time, and doing so will sensibly reduce the Engineer speed to 75% (225v), slightly slower than a Heavy, regardless of type and/or level of the building. Additionally, the Engineer won't be able to switch to any weapon or item until the building is redeployed. It's still possible to use his own Teleporters and those of friendly Engineers.

While hauling a building if the Engineer is killed the building is destroyed along with him. A special kill icon representing a toolbox will be shown along the Engineer's one.

Redeploying a building won't differ from a normal construction, except that the building will construct itself at twice the normal rate, and the Engineer can still speed up the process. Higher level buildings will have to cycle through all their upgrade animations before becoming operative, and cannot be packed up again until ready. Damaged buildings retain their health at the moment they were packed, and also cannot be repaired until operative again.

All the three phases -packing, hauling and redeploying- are accompanied by specific responses.

This mechanics allows for redeployment without having to completely reconstruct the hardware, thus saving metal and time, and also preserving any score tallies a building may have.

Destruction

A building can be by destroyed by his owner using the Demolish Tool or by an enemy using any weapon, including the Electro Sapper. Killing an Engineer who's hauling a building also count as one.

A destruction is worth one point to the destructee and is recorded on the player's scoreboard. A destruction cannot be assisted, unless the building has been sapped previously by a Spy; the Spy will then be awarded the assist point.

Destruction points cannot be awarded to Engineers who destroy their own buildings. Furthermore, destructions will not count for buildings that are still proceeding through the setup phase. However the destruction still occurs in game, and any associated effects, such as Frontier Justice's Revenge Crits, are triggered.

When a building is destroyed, the Engineer responds with one of three responses, alerting his nearby teammates.