The new veneer posts from Warm Springs Composite Products serve as an economical alternative to solid wood posts, are available in any wood species and can be manufactured up to 10½ inches wide and 10 feet long. Standard construction consists of an MDF core assembled into a hollow square tube which is then flat-laminated with high-quality veneers using no-added formaldehyde adhesives. Links:
[1] http://www.wscp.com/wood_products.htm