PKI Engineered I-Joists get their distinctive pink color from a nontoxic coating that the maker says resists fire, repels water, and prevents mold growth. They're sold in depths of 9-1/2, 11-7/8, 14, 16, and 18 inches and cost about 5 cents more per linear foot than comparable uncoated joists. Pink Wood, 403/279-3700,  

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