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A lot of builders prefer floor trusses to wood I-joists because their open webs make it easy to run utilities. But a drawback to floor trusses is that you can't cut them. Although I-joists can be ordered long, then trimmed to fit the actual site conditions, if you've ordered 24-foot trusses and your foundation sub pours his walls 24 feet, 3 inches apart (it has happened), you have a problem. TrimJoist solves the problem by placing a 1-foot-long, trimmable OSB web at either end of a parallel-web floor truss that comes in 12-, 14-, 16-, and 18-inch depths and in lengths from 4 feet to 30 feet, in 2-foot increments. The manufacturer says that costs are