Decay

Player made structures start to suffer from decay after a grace period, damaging them regularly until they're destroyed. Husks of those structures also decay.

Grace Period

The Grace Period starts when the structure is built. Its duration depends on the structure type (see the table at the bottom). It is reset if the structure is upgraded, however Small Modifications and Infrastructure Modifications for Trenches and Bunkers do not count. Repairing a decayed structure partially resets it, proportionally to how much health percentage was repaired.

Affected Structures

Decay affects all player placed structures, including deployed tripods and shippables (containers, concrete mixers, emplacements, etc...). The exceptions are standalone Anti-Tank Mines, AP Mines, and Sea Mines which always last 48 hours and Signposts which last 50 hours by default but changes depending on the numbers of votes they receive. The A0E-9 Rocket Platform and its Rocket also do not decay.

Unfinished structure Build Sites suffer from decay but it cannot be prevented. Unfinished vehicle Build Sites (Motorboat, Construction Vehicle) are unaffected by decay.

World structures (e.g. Garrisoned Houses, Town Bases, World Resource Mines, etc...) are not affected by decay. The only exception are Border Bases due to the Frontier Border mechanic. Town Bases and Relic Bases that are made into Zoo can also decay once they run out of Soldier Supplies, with a grace period of ~24 h (+-6 h ?) and a decay rate of 5% HP every ~20 min (+-5 min ?).

Decay does not affect vehicles, but most will despawn after 3 days of inactivity to help server performance.

Decay Prevention

A Base can prevent the decay of structures within its AI range by consuming Maintenance Supplies placed in its stockpile.

A Maintenance Tunnel can also prevent decay by consuming Maintenance Supplies. In its menu, the player can adjust the supply range (0-100m) and select the types of structures to maintain (using the same categories as the Build menu plus one for Shippables).

When placing a structure blueprint, the game will show you whether it is in range of a supply source. You can use a Hammer in Upgrade Mode () on a structure to see whether its decay is prevented by a Base or Tunnel and to see the distance and direction towards it.

You can check the maintenance status of a base or tunnel by putting your cursor on the tiny maintenance supplies icon in their menu.

Structures whose decay is actively prevented also get slowly repaired (1% health per hour) regardless of the damage source.

The decay of Husks of player built structures cannot be prevented, except for Bunker Base husks.

Supply Consumption

The Maintenance Supplies are consumed at a rate of 1 per decaying structure per hour. The modifications on Trenches and Bunkers do not count as separate structures.

A handful of structures additionally have increased consumption:

• Foundations consume x2.
• Underground Pipelines consume x4.
• Provisional Roads consume x2.

Rapid Decay Zone

No-Build Zone represented in red and Rapid Decay Zone in green.

Structures built within 150m of a region border suffer from rapid decay. Their grace period and decay duration are 10 times shorter, most structures only last a few hours. Trying to place a structure blueprint in that area will show you a warning. Rapid decay cannot be prevented.

Exceptions:

• Structures built within 50m of a Resource Field, Resource Mine, or World Base are not affected
• Structures built within 40m of a friendly Border Base on the enemy's side of the border
• Small Gauge Railway Tracks and Railway Tracks are not affected
• Shippable structures placed in the Rapid Decay Zone only have the shortened grace period, their decay duration remains unchanged.

Decay Duration

The time it takes for decay to fully destroy a structure (or structure husk) depends on its type, see the table below. A decay duration of 0 means the structure instantly dies the moment the grace period ends. For structure with a husk, the row is split in two with the husk's value below the separation.

Note that structures built on terrain devastated by artillery take more damage from decay thus their decay duration can be lower than expected (as low as half the normal duration). The grace period is unchanged however.

Structure	Type	Grace Period	Decay Duration	Grace (RDZ)	Decay Duration (RDZ)
50-500 “Thunderbolt” Cannon	Player Manned Defense	48 hrs	24 hrs	4.8 hrs	24 hrs
A0E-9 Rocket Body	Rocket Part	24 hrs	24 hrs	2.4 hrs	24 hrs
A0E-9 Rocket Booster	Rocket Part	24 hrs	24 hrs	2.4 hrs	24 hrs
A0E-9 Rocket Platform	Production	36 hrs	23 hrs	3.6 hrs	2 hrs
A0E-9 Rocket Warhead	Rocket Part	24 hrs	24 hrs	2.4 hrs	24 hrs
Abisme AT-99 Minefield	Passive Defense	24 hrs	16 hrs	2.4 hrs	1 hrs
Aircraft Radar Parts	Large Structure Part	24 hrs	24 hrs	2.4 hrs	24 hrs
Ammunition Factory	Production	36 hrs 36 hrs	23 hrs 23 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Anti-Tank Pillbox	Automated Defense	48 hrs	31 hrs	4.8 hrs	3 hrs
Artillery Garrison (Tier 1)	Automated Defense	30 hrs 1 hrs	30 hrs 0 hrs	3 hrs 0.1 hrs	3 hrs 0 hrs
Artillery Garrison (Tier 2)	Automated Defense	30 hrs 0.3 hrs	30 hrs 4 hrs	3 hrs 0 hrs	3 hrs 0 hrs
Artillery Garrison (Tier 3)	Automated Defense	75.3 hrs 75 hrs	45 hrs 45 hrs	7.5 hrs 7.5 hrs	4 hrs 4 hrs
Artillery Shelter Room (Tier 2)	Utility	29.3 hrs	31 hrs	2.9 hrs	3 hrs
Artillery Shelter Room (Tier 3)	Utility	75 hrs	45 hrs	7.5 hrs	4 hrs
AT Gun Garrison (Tier 1)	Automated Defense	30 hrs 12.5 hrs	30 hrs 29 hrs	3 hrs 1.3 hrs	3 hrs 2 hrs
AT Gun Garrison (Tier 2)	Automated Defense	30 hrs 0.3 hrs	30 hrs 4 hrs	3 hrs 0 hrs	3 hrs 0 hrs
AT Gun Garrison (Tier 3)	Automated Defense	75.3 hrs 75 hrs	45 hrs 45 hrs	7.5 hrs 7.5 hrs	4 hrs 4 hrs
Barbed Wire	Passive Defense	25 hrs	16.7 hrs	2.5 hrs	1.7 hrs
Barbed Wire Fence	Passive Defense	24 hrs	15 hrs	2.4 hrs	1 hrs
BMS Foreman Stacker	Utility	36 hrs	24 hrs	3.6 hrs	2 hrs
Border Base	Home Base	60 hrs	60 hrs	6 hrs	6 hrs
Bunker (Tier 1)	Passive Defense	29.3 hrs 1 hrs	31 hrs 0 hrs	2.9 hrs 0.1 hrs	3 hrs 0 hrs
Bunker (Tier 2)	Passive Defense	29.3 hrs 0.3 hrs	31 hrs 4 hrs	2.9 hrs 0 hrs	3 hrs 0 hrs
Bunker (Tier 3)	Passive Defense	75 hrs 75 hrs	45 hrs 45 hrs	7.5 hrs 7.5 hrs	4 hrs 4 hrs
Bunker Base (Tier 1)	Forward Base	87.5 hrs 0.7 hrs	62 hrs 0 hrs	8.8 hrs 0.1 hrs	6 hrs 0 hrs
Bunker Base (Tier 2)	Forward Base	100 hrs 0.3 hrs	60 hrs 1 hrs	10 hrs 0 hrs	6 hrs 0 hrs
Bunker Base (Tier 3)	Forward Base	116.7 hrs 0.7 hrs	69 hrs 1 hrs	11.7 hrs 0.1 hrs	6 hrs 0 hrs
Bunker Corner (Tier 1)	Passive Defense	29.3 hrs 1 hrs	31 hrs 0 hrs	2.9 hrs 0.1 hrs	3 hrs 0 hrs
Bunker Corner (Tier 2)	Passive Defense	29.3 hrs 0.3 hrs	31 hrs 4 hrs	2.9 hrs 0 hrs	3 hrs 0 hrs
Bunker Corner (Tier 3)	Passive Defense	75 hrs 75 hrs	45 hrs 45 hrs	7.5 hrs 7.5 hrs	4 hrs 4 hrs
Bunker Hearth (Tier 1)	Utility	12.5 hrs	6 hrs	1.3 hrs	0 hrs
Bunker Hearth (Tier 2)	Utility	29.3 hrs	31 hrs	2.9 hrs	3 hrs
Bunker Hearth (Tier 3)	Utility	75 hrs	45 hrs	7.5 hrs	4 hrs
Bunker Ramp (Tier 1)	Passive Defense	12.5 hrs	6 hrs	1.3 hrs	0 hrs
Bunker Ramp (Tier 2)	Passive Defense	29.3 hrs	31 hrs	2.9 hrs	3 hrs
Bunker Ramp (Tier 3)	Passive Defense	75 hrs	45 hrs	7.5 hrs	4 hrs
Catwalk Bridge	Utility	36 hrs	24 hrs	3.6 hrs	2 hrs
Catwalk Platform	Utility	36 hrs	24 hrs	3.6 hrs	2 hrs
Catwalk Stairs	Utility	36 hrs	24 hrs	3.6 hrs	2 hrs
Coal Refinery	Production	36 hrs 36 hrs	23 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Concrete Foundation (1x1)	Utility	40 hrs	24 hrs	4 hrs	2 hrs
Concrete Foundation (1x2)	Utility	40 hrs	24 hrs	4 hrs	2 hrs
Concrete Foundation (2x2)	Utility	40 hrs	24 hrs	4 hrs	2 hrs
Concrete Foundation Corner (1x1)	Utility	40 hrs	24 hrs	4 hrs	2 hrs
Concrete Mixer	Production	14.4 hrs	29 hrs	1.4 hrs	29 hrs
Construction Equipment	Shippable Construction Equipment	14.4 hrs	29 hrs	1.4 hrs	29 hrs
Construction Parts	Large Structure Part	24 hrs	24 hrs	2.4 hrs	24 hrs
Crane Railway Track	Utility	36 hrs	24 hrs	3.6 hrs	2 hrs
Crate Transfer Station	Storage	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Crow's Foot Minefield	Passive Defense	24 hrs	16 hrs	2.4 hrs	1 hrs
DAE 1b-2 “Serra”	Player Manned Defense	48 hrs	24 hrs	4.8 hrs	24 hrs
DAE 1o-3 “Polybolos”	Player Manned Defense	48 hrs	24 hrs	4.8 hrs	24 hrs
DAE 2a-1 “Ruptura”	Player Manned Defense	48 hrs	24 hrs	4.8 hrs	24 hrs
DAE 3b-2 “Hades' Net”	Player Manned Defense	48 hrs	24 hrs	4.8 hrs	24 hrs
Deployed Legion Vexillum	Utility	12 hrs	11 hrs	1.2 hrs	1 hrs
Deployed Listening Kit	Utility	12 hrs	11 hrs	1.2 hrs	1 hrs
Deployed Tripod	Utility	24 hrs	23 hrs	2.4 hrs	2 hrs
Deployed War Ensign	Utility	12 hrs	11 hrs	1.2 hrs	1 hrs
Deployed Wind Sock	Utility	12 hrs	11 hrs	1.2 hrs	1 hrs
Diesel Power Plant	Production	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Dragon's Teeth	Passive Defense	75 hrs	45 hrs	7.5 hrs	4 hrs
Dry Dock	Production	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
E681-B Hullbreaker Minefield	Passive Defense	24 hrs	16 hrs	2.4 hrs	1 hrs
Encampment	Forward Base	36 hrs 0.7 hrs	24 hrs 0 hrs	3.6 hrs 0.1 hrs	2 hrs 0 hrs
Engine Room (Tier 2)	Utility	24.5 hrs	35 hrs	2.5 hrs	3 hrs
Engine Room (Tier 3)	Utility	75 hrs	68 hrs	7.5 hrs	6 hrs
Field Bridge	Utility	5 hrs	7 hrs	0.5 hrs	0 hrs
Field Hospital	Medical Base	41.7 hrs	19 hrs	4.2 hrs	1 hrs
Field Modification Center	Production	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Field Range	Utility	33.3 hrs	24 hrs	3.3 hrs	2 hrs
Fire Pit	Utility	24 hrs	24 hrs	2.4 hrs	2 hrs
Fire Suppression Room (Tier 2)	Utility	29.3 hrs	31 hrs	2.9 hrs	3 hrs
Fire Suppression Room (Tier 3)	Utility	75 hrs	45 hrs	7.5 hrs	4 hrs
Foundation (1x1)	Utility	40 hrs	24 hrs	4 hrs	2 hrs
Foundation (1x2)	Utility	40 hrs	24 hrs	4 hrs	2 hrs
Foundation (2x2)	Utility	40 hrs	24 hrs	4 hrs	2 hrs
Foundation Corner (1x1)	Utility	40 hrs	24 hrs	4 hrs	2 hrs
Foxhole	Passive Defense	8 hrs	3 hrs	0.8 hrs	0 hrs
Gate (Tier 1)	Passive Defense	8.3 hrs	9 hrs	0.8 hrs	0 hrs
Gate (Tier 2)	Passive Defense	41.7 hrs	22 hrs	4.2 hrs	2 hrs
Gate (Tier 3)	Passive Defense	90 hrs	55 hrs	9 hrs	5 hrs
Huber Exalt 150mm	Player Manned Defense	48 hrs	24 hrs	4.8 hrs	24 hrs
Huber Lariat 120mm	Player Manned Defense	48 hrs	24 hrs	4.8 hrs	24 hrs
Huber Starbreaker 94.5mm	Player Manned Defense	48 hrs	24 hrs	4.8 hrs	24 hrs
Infantry Kit Factory	Production	36 hrs 36 hrs	23 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Infantry Support Gun Pillbox	Automated Defense	48 hrs	32 hrs	4.8 hrs	3 hrs
Intelligence Center	Player Manned Defense	120 hrs	60 hrs	12 hrs	5 hrs
Intelligence Center Parts	Large Structure Part	24 hrs	24 hrs	2.4 hrs	24 hrs
Large Assembly Station	Production	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Large Structure Foundation	Utility	120 hrs	60 hrs	12 hrs	5 hrs
Leary Shellbore 68mm	Player Manned Defense	48 hrs	24 hrs	4.8 hrs	24 hrs
Leary Snare Trap 127	Player Manned Defense	48 hrs	24 hrs	4.8 hrs	24 hrs
Liquid Container	Storage	12 hrs	24 hrs	1.2 hrs	24 hrs
Liquid Silo	Utility	36 hrs 36 hrs	24 hrs 23 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Liquid Transfer Station	Storage	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Machine Gun Garrison (Tier 1)	Automated Defense	29.7 hrs 1 hrs	32 hrs 0 hrs	3 hrs 0.1 hrs	3 hrs 0 hrs
Machine Gun Garrison (Tier 2)	Automated Defense	29.7 hrs 0.3 hrs	32 hrs 4 hrs	3 hrs 0 hrs	3 hrs 0 hrs
Machine Gun Garrison (Tier 3)	Automated Defense	75 hrs 75 hrs	46 hrs 45 hrs	7.5 hrs 7.5 hrs	4 hrs 4 hrs
Machine Gun Pillbox	Automated Defense	36 hrs	24 hrs	3.6 hrs	2 hrs
Maintenance Tunnel	Utility	38 hrs	23 hrs	3.8 hrs	2 hrs
Material Pallet	Storage	24 hrs	12 hrs	2.4 hrs	12 hrs
Material Transfer Station	Storage	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Materials Factory	Production	36 hrs 36 hrs	23 hrs 23 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Medical Room (Tier 1)	Medical Base	29.3 hrs	31 hrs	2.9 hrs	3 hrs
Medical Room (Tier 2)	Medical Base	29.3 hrs	31 hrs	2.9 hrs	3 hrs
Medical Room (Tier 3)	Medical Base	72 hrs	72 hrs	7.2 hrs	7 hrs
Metalworks Factory	Production	36 hrs 36 hrs	23 hrs 23 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Naval Hull Segments	Ship Part	24 hrs	24 hrs	2.4 hrs	24 hrs
Naval Shell Plating	Ship Part	24 hrs	24 hrs	2.4 hrs	24 hrs
Naval Turbine Components	Ship Part	24 hrs	24 hrs	2.4 hrs	24 hrs
Navy Pier	Utility	5 hrs	7 hrs	0.5 hrs	0 hrs
Observation Bunker (Tier 1)	Automated Defense	30 hrs 0.3 hrs	29 hrs 4 hrs	3 hrs 0 hrs	2 hrs 0 hrs
Observation Bunker (Tier 2)	Automated Defense	30 hrs 0.3 hrs	30 hrs 4 hrs	3 hrs 0 hrs	3 hrs 0 hrs
Observation Bunker (Tier 3)	Automated Defense	75 hrs 75 hrs	45 hrs 45 hrs	7.5 hrs 7.5 hrs	4 hrs 4 hrs
Oil Refinery	Production	36 hrs 36 hrs	23 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Oil Well	Resource Harvester	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Pipeline	Utility	24 hrs	34 hrs	2.4 hrs	3 hrs
Pipeline (Overhead)	Utility	24 hrs	34 hrs	2.4 hrs	3 hrs
Pipeline (Underground)	Utility	24 hrs	34 hrs	2.4 hrs	3 hrs
Pipeline Valve	Utility	24 hrs	34 hrs	2.4 hrs	3 hrs
Power Pole	Utility	36 hrs	24 hrs	3.6 hrs	2 hrs
Power Station	Production	36 hrs 36 hrs	23 hrs 23 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Power Switch	Utility	36 hrs	24 hrs	3.6 hrs	2 hrs
Prepared Minefield	Passive Defense	1 hrs	0 hrs	0.1 hrs	0 hrs
Provisional Road	Utility	36 hrs	24 hrs	3.6 hrs	2 hrs
Railway Track	Utility	48 hrs	33 hrs	4.8 hrs	3 hrs
Railway Track (Biarc)	Utility	48 hrs	33 hrs	4.8 hrs	3 hrs
Railway Track (Foundation)	Utility	36 hrs	24 hrs	3.6 hrs	2 hrs
Resource Container	Storage	12 hrs	23 hrs	1.2 hrs	23 hrs
Resource Transfer Station	Storage	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Rifle Garrison (Tier 1)	Automated Defense	29.9 hrs 1 hrs	31 hrs 0 hrs	3 hrs 0.1 hrs	3 hrs 0 hrs
Rifle Garrison (Tier 2)	Automated Defense	29.9 hrs 0.3 hrs	31 hrs 4 hrs	3 hrs 0 hrs	3 hrs 0 hrs
Rifle Garrison (Tier 3)	Automated Defense	75 hrs 75 hrs	45 hrs 45 hrs	7.5 hrs 7.5 hrs	4 hrs 4 hrs
Rifle Pillbox	Automated Defense	24 hrs	15 hrs	2.4 hrs	1 hrs
Sandbag Cover	Passive Defense	29.2 hrs	17 hrs	2.9 hrs	1 hrs
Sandbag Wall	Passive Defense	66 hrs	39 hrs	6.6 hrs	3 hrs
SC-3 Aerial Interceptor Array	Player Manned Defense	120 hrs	60 hrs	12 hrs	5 hrs
Shipping Container	Storage	12 hrs	24 hrs	1.2 hrs	24 hrs
Small Assembly Station	Production	36 hrs 36 hrs	23 hrs 23 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Small Gauge Railway Track	Utility	48 hrs	33 hrs	4.8 hrs	3 hrs
Small Gauge Railway Track (Biarc)	Utility	48 hrs	33 hrs	4.8 hrs	3 hrs
Small Gauge Railway Track (Foundation)	Utility	36 hrs	24 hrs	3.6 hrs	2 hrs
Stationary Harvester (Coal)	Resource Harvester	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Stationary Harvester (Components)	Resource Harvester	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Stationary Harvester (Salvage)	Resource Harvester	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Stationary Harvester (Sulfur)	Resource Harvester	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Storage Box	Storage	33.3 hrs	19 hrs	3.3 hrs	1 hrs
Storage Room (Tier 2)	Storage	29.3 hrs	31 hrs	2.9 hrs	3 hrs
Storage Room (Tier 3)	Storage	72 hrs	72 hrs	7.2 hrs	7 hrs
Storm Cannon	Player Manned Defense	119 hrs 75 hrs	68 hrs 45 hrs	11.9 hrs 7.5 hrs	6 hrs 4 hrs
Storm Cannon Parts	Large Structure Part	24 hrs	24 hrs	2.4 hrs	24 hrs
Structure Parts	Large Structure Part	24 hrs	24 hrs	2.4 hrs	24 hrs
Tank Trap	Passive Defense	33.3 hrs	24 hrs	3.3 hrs	2 hrs
Trench (Tier 1)	Passive Defense	24.7 hrs 1 hrs	31 hrs 0 hrs	2.5 hrs 0.1 hrs	3 hrs 0 hrs
Trench (Tier 2)	Passive Defense	24.7 hrs 0.2 hrs	30 hrs 4 hrs	2.5 hrs 0 hrs	3 hrs 0 hrs
Trench (Tier 3)	Passive Defense	43.8 hrs 43.8 hrs	29 hrs 29 hrs	4.4 hrs 4.4 hrs	2 hrs 2 hrs
Trench Connector (Tier 1)	Passive Defense	24.7 hrs 1 hrs	31 hrs 0 hrs	2.5 hrs 0.1 hrs	3 hrs 0 hrs
Trench Connector (Tier 2)	Passive Defense	24.7 hrs 0.2 hrs	30 hrs 4 hrs	2.5 hrs 0 hrs	3 hrs 0 hrs
Trench Connector (Tier 3)	Passive Defense	43.8 hrs 43.8 hrs	29 hrs 29 hrs	4.4 hrs 4.4 hrs	2 hrs 2 hrs
Trench Emplacement (Tier 1)	Passive Defense	24.7 hrs 1 hrs	31 hrs 0 hrs	2.5 hrs 0.1 hrs	3 hrs 0 hrs
Trench Emplacement (Tier 2)	Passive Defense	24.7 hrs 0.2 hrs	30 hrs 4 hrs	2.5 hrs 0 hrs	3 hrs 0 hrs
Trench Emplacement (Tier 3)	Passive Defense	43.8 hrs 43.8 hrs	29 hrs 29 hrs	4.4 hrs 4.4 hrs	2 hrs 2 hrs
Trench Intersection (Tier 1)	Passive Defense	24.7 hrs 1 hrs	31 hrs 0 hrs	2.5 hrs 0.1 hrs	3 hrs 0 hrs
Trench Intersection (Tier 2)	Passive Defense	24.7 hrs 0.2 hrs	30 hrs 4 hrs	2.5 hrs 0 hrs	3 hrs 0 hrs
Trench Intersection (Tier 3)	Passive Defense	43.8 hrs 43.8 hrs	29 hrs 29 hrs	4.4 hrs 4.4 hrs	2 hrs 2 hrs
Underground Fortress	Forward Base	116.7 hrs	70 hrs	11.7 hrs	7 hrs
Underground Fortress Parts	Large Structure Part	24 hrs	24 hrs	2.4 hrs	24 hrs
Wall (Tier 1)	Passive Defense	8.3 hrs	9 hrs	0.8 hrs	0 hrs
Wall (Tier 2)	Passive Defense	41.7 hrs	22 hrs	4.2 hrs	2 hrs
Wall (Tier 3)	Passive Defense	90 hrs	55 hrs	9 hrs	5 hrs
Watch Tower	Automated Defense	32.1 hrs	21 hrs	3.2 hrs	2 hrs
Water Pump	Resource Harvester	36 hrs 36 hrs	24 hrs 24 hrs	3.6 hrs 3.6 hrs	2 hrs 2 hrs
Weather Station	Player Manned Defense	120 hrs	60 hrs	12 hrs	5 hrs
Weather Station Parts	Large Structure Part	24 hrs	24 hrs	2.4 hrs	24 hrs

Tips

• The grace period of shippable structures can be reset by packaging and unpackaging them.

Update History

Update	Changes
Update 1.56	The Sub-Region modifier for Maintenance Supplies has been removed.
Update 1.52	Changes to Decay Mechanics and Garrison Supplies. Garrison Supplies have been repurposed into Maintenance Supplies. Maintenance Supplies are producible at the Factory, Mass Production Factory, and Materials Factory. Maintenance Supplies are assembled faster from a Materials Factory stockpile. When decay is prevented by Maintenance Supplies, the structure will also be repaired by 1% at the same time. The Supply Station has been converted into a Maintenance Tunnel. This will enable base builders to fine-tune which structures have decay prevented based on: Range Structure category (defenses, entrenchments, containers, etc). The Maintenance Tunnel can be built anywhere without Foundations. Sub-Region zones will have a reduced cost of Maintenance Supplies when server performance is optimal. This modifier will go negative and require more Maintenance Supplies as server performance degrades. This modifier can be seen from the Sub-Region tooltip. Players will be able to tell which structures are supplied by accessing the upgrade menu on a structure. An arrow will be drawn to the structure that is preventing its decay. Systems and content like the Supply Station, Bunker Supplies, Base Garrison Upgrades, and Supply Surplus mechanics have been removed or altered to suit new decay mechanics.

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