Type V buildings are known as wood frame construction. To break Type V constructions to the basics, they are constructed of lightweight materials to save the contractor money. This type of construction is the most dangerous to firefighter due to the lightweight, cost effective materials used. Some of the wood frame buildings are Log cabins, Post and frame, Balloon Frame, platform frame, plank and beam, and truss frame.
Log cabins are structures that are built out of tree logs. The ends are notched in order for the logs to be stacked on top of each other. Just like the popular toy, Lincoln Logs, these buildings are built the same way. The interior walls are usually wooden boards with a lacquer finish or a gypsum board finish. Due the types of interior finishing, it can help a going or started fire indoors spread within seconds. The lacquer finishing proposes an extreme fire hazard for