In Ching he explains in detail of building materials. Ching starts explaining the different parts of masonry bonding and then the different types of mortar joints and different bonding designs. He then moves on to lumber. He explains how there are different types of lumber and what their uses are. Lumber has to go through different grades to make sure that they are suitable for what they will be used for. Next, Ching talks about the different shapes of steel beams, and each one is used in construction. He also explains what span should the steel beams be to support a certain weight. Then Ching explains reinforced concrete beams. He states, ” designed to act together with longitudinal and web reindorcement in resisting applied forces”. Concrete columns should have lateral reinforcement  in order to resist vertical forces. Lastly, Ching talks about pre cast concrete flooring. They are made off site and then bought in. They are used for one way spanning and have great structural capacity.