Builder: Within ten years, most of the new homes constructed in North America will have steel frameworks rather than wood ones  After all, two-by-fours and two-by-sixes -- the sizes of lumber most commonly used in home construction -- are deteriorating in quality and increasing in cost, while environment-friendly steel is decreasing in cost
In addition, unlike wood, steel will not warp, rot, or split
Training home construction workers to work with steel is very costly.