Untreated wood in contact with the ground lasts only 3 to 12 years, whereas species like red pine, jack pine and Douglas fir last 25 to 40 years when factory pressure-treated. The importance of preservative-treated wood is discussed.
Agricultural structures often place severe conditions on concrete components. To obtain the best performing concrete for the job, it is important to know and ask for the required concrete specifications. Concrete mix design is a complex subject.