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Exploration & Movement

Carrying Capacity

Armor and Encumbrance for Other Base Speeds

Movement

Tactical Movement
Local Movement
Overland Movement
Evasion and Pursuit

Exploration

Vision and Light

Breaking and Entering

Smashing an Object
Breaking Items

Tables on this Page

Table: Carrying Capacity
Table: Armor and Encumbrance for Other Base Speeds
Table: Encumbrance Effects
Table: Movement and Distance
Table: Hampered Movement
Table: Terrain and Overland Movement
Table: Mounts and Vehicles
Table: Light Sources and Illumination
Table: Size and Armor Class of Objects
Table: Substance Hardness and Hit Points
Table: DCs to Break or Burst Items
Table: Object Hardness and Hit Points
Table: Common Armor Weapon and Shield Hardness and Hit Points

Table: Carrying Capacity

Strength Score Light Load Medium Load Heavy Load
1 3 lbs. or less 4–6 lbs. 7–10 lbs.
2 6 lbs. or less 7–13 lbs. 14–20 lbs.
3 10 lbs. or less 11–20 lbs. 21–30 lbs.
4 13 lbs. or less 14–26 lbs. 27–40 lbs.
5 16 lbs. or less 17–33 lbs. 34–50 lbs.
6 20 lbs. or less 21–40 lbs. 41–60 lbs.
7 23 lbs. or less 24–46 lbs. 47–70 lbs.
8 26 lbs. or less 27–53 lbs. 54–80 lbs.
9 30 lbs. or less 31–60 lbs. 61–90 lbs.
10 33 lbs. or less 34–66 lbs. 67–100 lbs.
11 38 lbs. or less 39–76 lbs. 77–115 lbs.
12 43 lbs. or less 44–86 lbs. 87–130 lbs.
13 50 lbs. or less 51–100 lbs. 101–150 lbs.
14 58 lbs. or less 59–116 lbs. 117–175 lbs.
15 66 lbs. or less 67–133 lbs. 134–200 lbs.
16 76 lbs. or less 77–153 lbs. 154–230 lbs.
17 86 lbs. or less 87–173 lbs. 174–260 lbs.
18 100 lbs. or less 101–200 lbs. 201–300 lbs.
19 116 lbs. or less 117–233 lbs. 234–350 lbs.
20 133 lbs. or less 134–266 lbs. 267–400 lbs.
21 153 lbs. or less 154–306 lbs. 307–460 lbs.
22 173 lbs. or less 174–346 lbs. 347–520 lbs.
23 200 lbs. or less 201–400 lbs. 401–600 lbs.
24 233 lbs. or less 234–466 lbs. 467–700 lbs.
25 266 lbs. or less 267–533 lbs. 534–800 lbs.
26 306 lbs. or less 307–613 lbs. 614–920 lbs.
27 346 lbs. or less 347–693 lbs. 694–1,040 lbs.
28 400 lbs. or less 401–800 lbs. 801–1,200 lbs.
29 466 lbs. or less 467–933 lbs. 934–1,400 lbs.
+10 ×4 ×4 ×4

Table: Armor and Encumbrance for Other Base Speeds

The table below provides reduced speed figures for all base speeds from 5 feet to 120 feet (in 5-foot increments).

Base Speed Reduced Speed
5 ft. 5 ft.
10 ft.–15 ft. 10 ft.
20 ft. 15 ft.
25 ft.–30 ft. 20 ft.
35 ft. 25 ft.
40 ft.–45 ft. 30 ft.
50 ft. 35 ft.
55 ft.–60 ft. 40 ft.
65 ft. 45 ft.
70 ft.–75 ft. 50 ft.
80 ft. 55 ft.
85 ft.–90 ft. 60 ft.
95 ft. 65 ft.
100 ft.–105 ft. 70 ft.
110 ft. 75 ft.
115 ft.–120 ft. 80 ft.

Table: Encumbrance Effects

Load Max Dex Check Penalty Speed Run
(30 ft.) (20 ft.)
Medium +3 –3 20 ft. 15 ft. ×4
Heavy +1 –6 20 ft. 15 ft. ×3

Table: Movement and Distance

Speed 15 feet 20 feet 30 feet 40 feet
One Round (Tactical)*
Walk 15 ft. 20 ft. 30 ft. 40 ft.
Hustle 30 ft. 40 ft. 60 ft. 80 ft.
Run (×3) 45 ft. 60 ft. 90 ft. 120 ft.
Run (×4) 60 ft. 80 ft. 120 ft. 160 ft.
One Minute (Local)
Walk 150 ft. 200 ft. 300 ft. 400 ft.
Hustle 300 ft. 400 ft. 600 ft. 800 ft.
Run (×3) 450 ft. 600 ft. 900 ft. 1,200 ft.
Run (×4) 600 ft. 800 ft. 1,200 ft. 1,600 ft.
One Hour (Overland)
Walk 1-1/2 miles 2 miles 3 miles 4 miles
Hustle 3 miles 4 miles 6 miles 8 miles
Run
One Day (Overland)
Walk 12 miles 16 miles 24 miles 32 miles
Hustle
Run

* Tactical movement is often measured in squares on the battle grid (1 square = 5 feet) rather than feet.

Table: Hampered Movement

Condition Additional Movement Cost
Difficult terrain ×2
Obstacle* ×2
Poor visibility ×2
Impassable

* May require a skill check

Table: Terrain and Overland Movement

Terrain Highway Road or Trail Trackless
Desert, Sandy x1 x1/2 x1/2
Forest x1 x1 x1/2
Hills x1 x3/4 x1/2
Jungle x1 x3/4 x1/4
Moor x1 x1 x3/4
Mountains x3/4 x3/4 x1/2
Plains x1 x1 x3/4
Swamp x1 x3/4 x1/2
Tundra, frozen x1 x3/4 x3/4

Table: Mounts and Vehicles

Mount/Vehicle Per Hour Per Day
Mount (carrying load)
Light horse 5 miles 40 miles
Light horse (175–525 lbs.)1 3-1/2 miles 28 miles
Heavy horse 5 miles 40 miles
Heavy horse (229–690 lbs.)1 3-1/2 miles 28 miles
Pony 4 miles 32 miles
Pony (151–450 lbs.)1 3 miles 24 miles
Dog, riding 4 miles 32 miles
Dog, riding (101–300 lbs.)1 3 miles 24 miles
Cart or wagon 2 miles 16 miles
Ship
Raft or barge (poled or towed)2 1/2 mile 5 miles
Keelboat (rowed)2 1 mile 10 miles
Rowboat (rowed)2 1-1/2 miles 15 miles
Sailing ship (sailed) 2 miles 48 miles
Warship (sailed and rowed) 2-1/2 miles 60 miles
Longship (sailed and rowed) 3 miles 72 miles
Galley (rowed and sailed) 4 miles 96 miles

1 Quadrupeds, such as horses, can carry heavier loads than characters can. See Carrying Capacity for more information.
2 Rafts, barges, keelboats, and rowboats are most often used on lakes and rivers. If going downstream, add the speed of the current (typically 3 miles per hour) to the speed of the vehicle. In addition to 10 hours of being rowed, the vehicle can also float an additional 14 hours, if someone can guide it, adding an additional 42 miles to the daily distance traveled. These vehicles can’t be rowed against any significant current, but they can be pulled upstream by draft animals on the shores.

Table: Light Sources and Illumination

Object Normal Increased Duration
Candle n/a1 5 ft. 1 hr.
Everburning torch 20 ft. 40 ft. Permanent
Lamp, common 15 ft. 30 ft. 6 hr./pint
Lantern, bullseye 60-ft. cone 120-ft. cone 6 hr./pint
Lantern, hooded 30 ft. 60 ft. 6 hr./pint
Sunrod 30 ft. 60 ft. 6 hr.
Torch 20 ft. 40 ft. 1 hr.
Spell Normal Increase Duration
Continual flame 20 ft. 40 ft. Permanent
Dancing lights (torches) 20 ft. (each) 40 ft. (each) 1 min.
Daylight 60 ft.2 120 ft. 10 min./level
Light 20 ft. 40 ft. 10 min./level

1 A candle does not provide normal illumination, only dim illumination. 2 The light for a daylight spell is bright light.

Table: Size and Armor Class of Objects

Size AC Modifier
Colossal –8
Gargantuan –4
Huge –2
Large –1
Medium +0
Small +1
Tiny +2
Diminutive +4
Fine +8

Table: Substance Hardness and Hit Points

Substance Hardness Hit Points
Glass 1 1/in. of thickness
Paper or cloth 0 2/in. of thickness
Rope 0 2/in. of thickness
Ice 0 3/in. of thickness
Leather or hide 2 5/in. of thickness
Wood 5 10/in. of thickness
Stone 8 15/in. of thickness
Iron or steel 10 30/in. of thickness
Mithral 15 30/in. of thickness
Adamantine 20 40/in. of thickness

Table: DCs to Break or Burst Items

Strength Check to: DC
Break down simple door 13
Break down good door 18
Break down strong door 23
Burst rope bonds 23
Bend iron bars 24
Break down barred door 25
Burst chain bonds 26
Break down iron door 28
Condition DC Adjustment*
Hold portal +5
Arcane lock +10

* If both apply, use the larger number.

Table: Object Hardness and Hit Points

Object Hardness Hit Points Break DC
Rope (1 in. diameter) 0 2 23
Simple wooden door 5 10 13
Small chest 5 1 17
Good wooden door 5 15 18
Treasure chest 5 15 23
Strong wooden door 5 20 23
Masonry wall (1 ft. thick) 8 90 35
Hewn stone (3 ft. thick) 8 540 50
Chain 10 5 26
Manacles 10 10 26
Masterwork manacles 10 10 28
Iron door (2 in. thick) 10 60 28

Table: Common Armor, Weapon, and Shield Hardness and Hit Points

Weapon or Shield Hardness1 Hit Points2, 3
Light blade 10 2
One-handed blade 10 5
Two-handed blade 10 10
Light metal-hafted weapon 10 10
One-handed metal-hafted weapon 10 20
Light hafted weapon 5 2
One-handed hafted weapon 5 5
Two-handed hafted weapon 5 10
Projectile weapon 5 5
Armor special4 armor bonus × 5
Buckler 10 5
Light wooden shield 5 7
Heavy wooden shield 5 15
Light steel shield 10 10
Heavy steel shield 10 20
Tower shield 5 20

1 Add +2 for each +1 enhancement bonus of magic items.
2 The hp value given is for Medium armor, weapons, and shields. Divide by 2 for each size category of the item smaller than Medium, or multiply it by 2 for each size category larger than Medium.
3 Add 10 hp for each +1 enhancement bonus of magic items.
4 Varies by material; see Table: Substance Hardness and Hit Points.

Carrying Capacity

These carrying capacity rules determine how much a character's equipment slows him down. Encumbrance comes in two parts: encumbrance by armor and encumbrance by total weight.

Encumbrance by Armor: A character's armor determines his maximum Dexterity bonus to AC, armor check penalty, speed, and running speed. Unless your character is weak or carrying a lot of gear, that's all you need to know; the extra gear your character carries won't slow him down any more than the armor already does.

If your character is weak or carrying a lot of gear, however, then you'll need to calculate encumbrance by weight. Doing so is most important when your character is trying to carry some heavy object.

Encumbrance by Weight: If you want to determine whether your character's gear is heavy enough to slow him down more than his armor already does, total the weight of all the character's items, including armor, weapons, and gear. Compare this total to the character's Strength on Table: Carrying Capacity. Depending on the character's carrying capacity, he or she may be carrying a light, medium, or heavy load. Like armor, a character's load affects his maximum Dexterity bonus to AC, carries a check penalty (which works like an armor check penalty), reduces the character's speed, and affects how fast the character can run, as shown on Table: Encumbrance Effects. A medium or heavy load counts as medium or heavy armor for the purpose of abilities or skills that are restricted by armor. Carrying a light load does not encumber a character.

If your character is wearing armor, use the worse figure (from armor or from load) for each category. Do not stack the penalties.

Lifting and Dragging: A character can lift as much as his maximum load over his head. A character's maximum load is the highest amount of weight listed for a character's Strength in the heavy load column of Table: Carrying Capacity.

A character can lift as much as double his maximum load off the ground, but he or she can only stagger around with it. While overloaded in this way, the character loses any Dexterity bonus to AC and can move only 5 feet per round (as a full-round action).

A character can generally push or drag along the ground as much as five times his maximum load. Favorable conditions can double these numbers, and bad circumstances can reduce them by half or more.

Bigger and Smaller Creatures: The figures on Table: Carrying Capacity are for Medium bipedal creatures. A larger bipedal creature can carry more weight depending on its size category, as follows: Large ×2, Huge ×4, Gargantuan ×8, Colossal ×16. A smaller creature can carry less weight depending on its size category, as follows: Small ×3/4, Tiny ×1/2, Diminutive ×1/4, Fine ×1/8.

Quadrupeds can carry heavier loads than bipeds can. Multiply the values corresponding to the creature's Strength score from Table: Carrying Capacity by the appropriate modifier, as follows: Fine ×1/4, Diminutive ×1/2, Tiny ×3/4, Small ×1, Medium ×1-1/2, Large ×3, Huge ×6, Gargantuan ×12, Colossal ×24.

Tremendous Strength: For Strength scores not shown on Table: Carrying Capacity, find the Strength score between 20 and 29 that has the same number in the “ones” digit as the creature's Strength score does and multiply the numbers in that row by 4 for every 10 points the creature's Strength is above the score for that row.

Armor and Encumbrance for Other Base Speeds

Table: Armor and Encumbrance for Other Base Speeds provides reduced speed figures for all base speeds from 5 feet to 120 feet (in 5-foot increments).

Movement

There are three movement scales, as follows:

  • Tactical, for combat, measured in feet (or 5-foot squares) per round.
  • Local, for exploring an area, measured in feet per minute.
  • Overland, for getting from place to place, measured in miles per hour or miles per day.

Modes of Movement

While moving at the different movement scales, creatures generally walk, hustle, or run.

  1. Walk: A walk represents unhurried but purposeful movement (3 miles per hour for an unencumbered adult human).
  2. Hustle: A hustle is a jog (about 6 miles per hour for an unencumbered human). A character moving his speed twice in a single round, or moving that speed in the same round that he or she performs a standard action or another move action, is hustling when he or she moves.
  3. Run:
    • Run (x3) - Moving three times speed is a running pace for a character in heavy armor (about 7 miles per hour for a human in full plate).
    • Run (x4) - Moving four times speed is a running pace for a character in light, medium, or no armor ( about 12 miles per hour for an unencumbered human, or 9 miles per hour for a human in chainmail) See Table: Movement and Distance for details.

Tactical Movement

Tactical movement is used for combat. Characters generally don't walk during combat, for obvious reasons—they hustle or run instead. A character who moves his speed and takes some action is hustling for about half the round and doing something else the other half.

Hampered Movement: Difficult terrain, obstacles, and poor visibility can hamper movement (see Table: Hampered Movement for details). When movement is hampered, each square moved into usually counts as two squares, effectively reducing the distance that a character can cover in a move.

If more than one hampering condition applies, multiply all additional costs that apply. This is a specific exception to the normal rule for doubling.

In some situations, your movement may be so hampered that you don't have sufficient speed even to move 5 feet (1 square). In such a case, you may use a full-round action to move 5 feet (1 square) in any direction, even diagonally. Even though this looks like a 5-foot step, it's not, and thus it provokes attacks of opportunity normally. (You can't take advantage of this rule to move through impassable terrain or to move when all movement is prohibited to you.)

You can't run or charge through any square that would hamper your movement.

Local Movement

Characters exploring an area use local movement, measured in feet per minute.

Walk: A character can walk without a problem on the local scale.

Hustle: A character can hustle without a problem on the local scale. See Overland Movement, below, for movement measured in miles per hour.

Run: A character can run for a number of rounds equal to his Constitution score on the local scale without needing to rest. See Combat for rules covering extended periods of running.

Overland Movement

Characters covering long distances cross-country use overland movement. Overland movement is measured in miles per hour or miles per day. A day represents 8 hours of actual travel time. For rowed watercraft, a day represents 10 hours of rowing. For a sailing ship, it represents 24 hours.

Walk: A character can walk 8 hours in a day of travel without a problem. Walking for longer than that can wear him out (see Forced March, below).

Hustle: A character can hustle for 1 hour without a problem. Hustling for a second hour in between sleep cycles deals 1 point of nonlethal damage, and each additional hour deals twice the damage taken during the previous hour of hustling. A character who takes any nonlethal damage from hustling becomes fatigued.

A fatigued character can't run or charge and takes a penalty of –2 to Strength and Dexterity. Eliminating the nonlethal damage also eliminates the fatigue.

Run: A character can't run for an extended period of time. Attempts to run and rest in cycles effectively work out to a hustle.

Terrain: The terrain through which a character travels affects the distance he can cover in an hour or a day (see Table: Terrain and Overland Movement). A highway is a straight, major, paved road. A road is typically a dirt track. A trail is like a road, except that it allows only single-file travel and does not benefit a party traveling with vehicles. Trackless terrain is a wild area with no paths.

Forced March: In a day of normal walking, a character walks for 8 hours. The rest of the daylight time is spent making and breaking camp, resting, and eating.

A character can walk for more than 8 hours in a day by making a forced march. For each hour of marching beyond 8 hours, a Constitution check (DC 10, +2 per extra hour) is required. If the check fails, the character takes 1d6 points of nonlethal damage. A character who takes any nonlethal damage from a forced march becomes fatigued. Eliminating the nonlethal damage also eliminates the fatigue. It's possible for a character to march into unconsciousness by pushing himself too hard.

Mounted Movement: A mount bearing a rider can move at a hustle. The damage it takes when doing so, however, is lethal damage, not nonlethal damage. The creature can also be ridden in a forced march, but its Constitution checks automatically fail, and the damage it takes is lethal damage. Mounts also become fatigued when they take any damage from hustling or forced marches.

See Table: Mounts and Vehicles for mounted speeds and speeds for vehicles pulled by draft animals.

Waterborne Movement: See Table: Mounts and Vehicles: Mounts and Vehicles for speeds for water vehicles.

Evasion and Pursuit

In round-by-round movement, when simply counting off squares, it's impossible for a slow character to get away from a determined fast character without mitigating circumstances. Likewise, it's no problem for a fast character to get away from a slower one.

When the speeds of the two concerned characters are equal, there's a simple way to resolve a chase: If one creature is pursuing another, both are moving at the same speed, and the chase continues for at least a few rounds, have them make opposed Dexterity checks to see who is the faster over those rounds. If the creature being chased wins, it escapes. If the pursuer wins, it catches the fleeing creature.

Sometimes a chase occurs overland and could last all day, with the two sides only occasionally getting glimpses of each other at a distance. In the case of a long chase, an opposed Constitution check made by all parties determines which can keep pace the longest. If the creature being chased rolls the highest, it gets away. If not, the chaser runs down its prey, outlasting it with stamina.

Exploration

Few rules are as vital to the success of adventurers than those pertaining to vision, lighting, and how to break things. Rules for each of these are explained below.

Vision and Light

Dwarves and half-orcs have darkvision, but the other races presented in Races need light to see by. See Table: Light Sources and Illumination for the radius that a light source illuminates and how long it lasts. The increased entry indicates an area outside the lit radius in which the light level is increased by one step (from darkness to dim light, for example).

In an area of bright light, all characters can see clearly. Some creatures, such as those with light sensitivity and light blindness, take penalties while in areas of bright light. A creature can't use Stealth in an area of bright light unless it is invisible or has cover. Areas of bright light include outside in direct sunshine and inside the area of a daylight spell.

Normal light functions just like bright light, but characters with light sensitivity and light blindness do not take penalties. Areas of normal light include underneath a forest canopy during the day, within 20 feet of a torch, and inside the area of a light spell.

In an area of dim light, a character can see somewhat. Creatures within this area have concealment (20% miss chance in combat) from those without darkvision or the ability to see in darkness. A creature within an area of dim light can make a Stealth check to conceal itself. Areas of dim light include outside at night with a moon in the sky, bright starlight, and the area between 20 and 40 feet from a torch.

In areas of darkness, creatures without darkvision are effectively blinded. In addition to the obvious effects, a blinded creature has a 50% miss chance in combat (all opponents have total concealment), loses any Dexterity bonus to AC, takes a –2 penalty to AC, and takes a –4 penalty on Perception checks that rely on sight and most Strength- and Dexterity-based skill checks. Areas of darkness include an unlit dungeon chamber, most caverns, and outside on a cloudy, moonless night.

Characters with low-light vision (elves, gnomes, and half-elves) can see objects twice as far away as the given radius. Double the effective radius of bright light, normal light, and dim light for such characters.

Characters with darkvision (dwarves and half-orcs) can see lit areas normally as well as dark areas within 60 feet. A creature can't hide within 60 feet of a character with darkvision unless it is invisible or has cover.

Breaking and Entering

When attempting to break an object, you have two choices:

  1. Smash it with a weapon.
  2. Break it with sheer strength.

Smashing an Object

Smashing a weapon or shield with a slashing or bludgeoning weapon is accomplished with the sunder combat maneuver (see Combat). Smashing an object is like sundering a weapon or shield, except that your combat maneuver check is opposed by the object's AC. Generally, you can smash an object only with a bludgeoning or slashing weapon.

Armor Class: Objects are easier to hit than creatures because they don't usually move, but many are tough enough to shrug off some damage from each blow. An object's Armor Class is equal to 10 + its size modifier (see Table: Size and Armor Class of Objects) + its Dexterity modifier. An inanimate object has not only a Dexterity of 0 (–5 penalty to AC), but also an additional –2 penalty to its AC. Furthermore, if you take a full-round action to line up a shot, you get an automatic hit with a melee weapon and a +5 bonus on attack rolls with a ranged weapon.

Hardness: Each object has hardness—a number that represents how well it resists damage. When an object is damaged, subtract its hardness from the damage. Only damage in excess of its hardness is deducted from the object's hit points (see Table: Common Armor, Weapon, and Shield Hardness and Hit Points, Table: Substance Hardness and Hit Points, and Table: Object Hardness and Hit Points).

Hit Points: An object's hit point total depends on what it is made of and how big it is (see Table: Common Armor, Weapon, and Shield Hardness and Hit Points, Table: Substance Hardness and Hit Points, and Table: Object Hardness and Hit Points). Objects that take damage equal to or greater than half their total hit points gain the broken condition. When an object's hit points reach 0, it's ruined.

Very large objects have separate hit point totals for different sections.

Energy Attacks: Energy attacks deal half damage to most objects. Divide the damage by 2 before applying the object's hardness. Some energy types might be particularly effective against certain objects, subject to GM discretion. For example, fire might do full damage against parchment, cloth, and other objects that burn easily. Sonic might do full damage against glass and crystal objects.

Ranged Weapon Damage: Objects take half damage from ranged weapons (unless the weapon is a siege engine or something similar). Divide the damage dealt by 2 before applying the object's hardness.

Ineffective Weapons: Certain weapons just can't effectively deal damage to certain objects. For example, a bludgeoning weapon cannot be used to damage a rope. Likewise, most melee weapons have little effect on stone walls and doors, unless they are designed for breaking up stone, such as a pick or hammer.

Immunities: Objects are immune to nonlethal damage and to critical hits. Even animated objects, which are otherwise considered creatures, have these immunities.

Magic Armor, Shields, and Weapons: Each +1 of enhancement bonus adds 2 to the hardness of armor, a weapon, or a shield, and +10 to the item's hit points.

Vulnerability to Certain Attacks: Certain attacks are especially successful against some objects. In such cases, attacks deal double their normal damage and may ignore the object's hardness.

Damaged Objects: A damaged object remains functional with the broken condition until the item's hit points are reduced to 0, at which point it is destroyed. Damaged (but not destroyed) objects can be repaired with the Craft skill and a number of spells.

Saving Throws: Nonmagical, unattended items never make saving throws. They are considered to have failed their saving throws, so they are always fully affected by spells and other attacks that allow saving throws to resist or negate. An item attended by a character (being grasped, touched, or worn) makes saving throws as the character (that is, using the character's saving throw bonus).

Magic items always get saving throws. A magic item's Fortitude, Reflex, and Will save bonuses are equal to 2 + half its caster level. An attended magic item either makes saving throws as its owner or uses its own saving throw bonus, whichever is better.

Animated Objects: Animated objects count as creatures for purposes of determining their Armor Class (do not treat them as inanimate objects).

Breaking Items

When a character tries to break or burst something with sudden force rather than by dealing damage, use a Strength check (rather than an attack roll and damage roll, as with the sunder special attack) to determine whether he succeeds. Since hardness doesn't affect an object's Break DC, this value depends more on the construction of the item than on the material the item is made of. Consult Table: DCs to Break or Burst Items for a list of common Break DCs.

If an item has lost half or more of its hit points, the item gains the broken condition and the DC to break it drops by 2.

Larger and smaller creatures get size bonuses and size penalties on Strength checks to break open doors as follows: Fine –16, Diminutive –12, Tiny –8, Small –4, Large +4, Huge +8, Gargantuan +12, Colossal +16.

Note: Oil provides a +2 circumstance bonus on checks to open stuck doors and locks (Source Dungeoneer's Handbook.)

A crowbar or portable ram improves a character's chance of breaking open a door (see Equipment).