CC-BY-SA-3.0
Taken from cmss13 at https://github.com/cmss13-devs/cmss13/blob/5cf465e72efb6beccd2b78bf263072816a2a60ad/icons/obj/structures/barricades.dmi
Derived source crops for CMU draft 3D rails; see SOURCES_RAIL_VENDOR_FOOTPRINTS.md.
