Stone Block Stair Spiral Triangle

Spiral stairs which can be placed on triangle foundations. The stairs reach the height of a half-wall, but further stairs can be connected to increase the height. Stone is a large upgrade over wood granting a large amount of fire, melee, and explosive resistance. The material can withstand up to 2 Timed Explosive Charge. Upgrading a triangle spiral staircase to stone quality requires 300 Stone.