These log bunks are the type typically seen at lumber yards, logging operations and ship loading faciliites. They are usually set on concrete bases and used to stack logs in preparation for loading onto a truck, which then takes it to the mill, or the nearest offload facility, or to the side of a ship, where it is cabled and hoisted. They also are used on flatbeds for transport such as at shipping ports. I'm offering these in the basic raw materials, as the grainy texture is appropriate, as neat and clean they are not! Should there be an issue in printing, contact me via the shapeways designer link or direct via email to modelmechanic@gmail.com