Concerning the first reading, I learned that the materials used to construct a building have specific systems. The mechanical system promotes sanitation, protection, and transportation of individuals, the enclosure system promotes shelter and regulation of atmosphere for the occupants, and the structural system is focused on load-bearing and balance. Understanding how these systems work will help in the integration of constructing a safe building with effective materials. Factors such as hardness, durability, stability, and density are important to note. There are many materials that can be apart of a building: Wood is a simple material that is easy to harvest, but must be maintained. Concrete is a brittle material, but can be reinforced with steel. Steel has strength and elasticity, durable in compression, but loses strength when reacting to high temperatures. Finally, stone is durable and can withstand tension. Understanding how these forces effect the building are important to building a safe and efficient space.