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From Pathfinder Guns & Gears, which isn't enabled.

Battery Tower

VEHICLE 1
Price 30,000 gp
Space 50 feet long, 50 feet wide, 90 feet high
Crew 1 pilot, 150 turners, 2,200 pushers
Passengers 204
Piloting Check Diplomacy (DC 37), Intimidation (DC 37), or Warfare Lore (DC 35)

AC 34; Fort +28
Hardness 25, HP 150 (BT 75); Immunities object immunities

Speed 10 feet (pushed, turned)
Collision 8d10 (DC 32)
Sluggish

This vehicle must move twice its length for each 90-degree turn it makes.

Tiered

A battery tower has five levels. The crew operate at the bottom tier, turning a giant capstan, and up to four passengers can fit on that floor, enough for a full crew for a bombard. The remaining levels carry 50 passengers each. The tiers are specifically meant to be protective, and give those within the battery tower greater cover (or standard cover if the battery tower is broken). A massive ladder runs diagonally through the center of the battery tower, from the front of the top tier to the rear of the bottom tier. The ladder is wide enough for two crew or passengers to climb simultaneously.

Weaponry

A battery tower is usually loaded with black powder siege weapons for heavy assaults, with bombards on the bottom two floors and cannons on the other floors. Their Price is included in that of the battery tower. When building a battery tower, you can choose to replace any of these with other siege weapons of a lower Price. If you want a more expensive siege weapon, you must Craft it separately. Passengers of the battery tower can crew these siege weapons.

Description Black powder siege towers use the same rules as other siege towers.
Pathfinder Guns & GearsORC