In the "urban adventures" section of the PFSRD it states that an average small city wall is:
A typical small city wall is a fortified stone wall 5 feet thick and 20 feet high. Such a wall is fairly smooth, requiring a DC 30 Climb check to scale. The walls are crenelated on one side to provide a low wall for the guards atop it, and there is just barely room for guards to walk along the top of the wall. A typical small city wall has AC 3, hardness 8, and 450 hp per 10-foot section.
Yet, using the "Damaging Objects" info, a stone object has 15 hp per inch of thickness.
15 x 12 = 180 HP per foot
5 feet x 180 HP = 900 HP.
Why is the wall listed as having half that much HP in the example given in Urban Adventures?
Did I miss a modifier?
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In the "urban adventures" section of the PFSRD it states that an average small city wall is:
A typical small city wall is a fortified stone wall 5 feet thick and 20 feet high. Such a wall is fairly smooth, requiring a DC 30 Climb check to scale. The walls are crenelated on one side to provide a low wall for the guards atop it, and there is just barely room for guards to walk along the top of the wall. A typical small city wall has AC 3, hardness 8, and 450 hp per 10-foot section.Yet, using the "Damaging Objects" info, a stone object has 15 hp per inch of thickness.
15 x 12 = 180 HP per foot
5 feet x 180 HP = 900 HP.
Why is the wall listed as having half that much HP in the example given in Urban Adventures?
Did I miss a modifier?
I seriously doubt that the city wall is one solid block of stone, which is what the 900HP figure you come up with would indicate.
The 450HP figure lines up with a 5ft. masonry wall (basically, stone bricks). Source: If you look at the normal chart, a 1ft masonry wall is 90HP. Multiply that by 5.
Yeah, I looked at the chart and figured that must be where the stat came from, though it'd be nice to have some sort of "masonry stone" modifier for the stone area.
I guess that modifier can be 0.5, since that seems to work.