by TeckXKnight » Mon Apr 07, 2014 12:40 am
You need to discover the materials first. This is true for all items and constructions. Items must be discovered in different manners, for some you must be the first person to pick the item up, such as woodblocks, straw, plant fibers, and metal bars. For other items you must be the one to harvest the material, such as meat, bones, crops, and foragables. If the item was in the inventory of someone else before you then you did not count as discovering it. Items bought from a barter stand, even your own, count as being discovered.
For a tanning tub I believe you need to have discovered some kind of animal skin/fur as well as boards and possibly water. Good luck!