In these sections of the book Ching speaks upon masonry bonding terminology, lumber, wood panel products, steel beams, steel columns, concrete beams, concrete columns, and precast concrete floor systems. He starts off by explaining wythe, wythe is a continuous vertical section of a masonry wall one unit in thickness. Also course is a continuous horizontal range of masonry units. A stretcher is a masonry unit laid horizontally with the longer edge exposed or parallel to the surface. Mortar joints are also explained in this section, there are many different joints like concave joints, v-joint, weathered joint, struck joint, and a flush joint. Lumber is used for remanufacturing purposes because of the diversity of its applications. Each piece of lumber has a grademark indicating the assignment stress grade, mill of origin, moisture content at time of manufacture. Next wood panel products are less susceptible to shrinking or swelling, require less labor to install, and make more effective use of wood resources than solid wood products. Steel beams are more structurally efficient wide-flange shapes have largely suspended the classic l- beam shapes. Next steel columns are the most frequently used section for columns is the wide-flange shape. Concrete beams are designed to act together with longitudinal and web reinforcement in resisting applied forces. Concrete columns are designed to act together with vertical and lateral reinforcement in resisting applied forces. Lastly precast concrete slabs, beams, and structural tees are one-way spanning units that may be supported by site cast concrete, precast concrete, or masonry bearing walls, or by steel, site cast concrete, or precast concrete frames. In the other book fundamentals of building construction chapter eight Ching speaks about brick masonry, masonry is the simplest of building techniques the mason stacks pieces of materials like brick , stones, or concrete blocks atop one another to make walls . He also talks about mortar mixes, ingredients, hydration, and the construction of brick masonry.