Platform framing is the modern adaptation of balloon framing whereby vertical members extend from the floor to the ceiling of each story. Traditional balloon framing consists of closely spaced, light vertical structural members that extend from the foundation sill to the roof plates. Post-and-beam framing is typified by the use of large timber members. (See Figures 1A through 1C for illustrations of various historical and modern construction methods using wood members.) In post-and-beam framing, structural columns support horizontal members. ![]() The basic residential construction technique has remained much the same since the introduction of light wood-framed construction in the mid-1800s and is generally referred to as conventional construction. Foremost, the abundance of wood as a readily available resource has dictated traditional American housing construction, first as log cabins, then as post-and-beam structures, and finally as light-frame buildings. The conventional American house has been shaped over time by a variety of factors.
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