Can you fabricate stair stringers out of Trimax Structural Lumber?
Yes, you can. Typically 2×12’s are used to cut stair stringers. When you notch the 2×12, some strength is lost. In order to compensate, many contractors will install a 2×6 on the inside of each of the stair stringers to assist in supporting the weight. Please make sure to follow all span tables when designing a stair system.