What are the ethical considerations related to sourcing and using MSR lumber?

MSR is lumber that has modulus of elasticity E evaluated by mechanical stress equipment, with each piece being marked to indicate the modulus of elasticity E. Product Group: Framing Lumber. MSR lumber is intended for any engineered application where low variability in strength and stiffness properties is primary ... Jul 15, 1999 ... MSR lumber stands for "Machine Stress Rated". The lumber is passed through a machine that bends it a little. The machine measures how much ... MSR stands for Machine Stress Rated. This lumber also undergoes inspection so it will less likely create failures during construction projects. This guarantees ... Sep 10, 2012 ... SFPA does not test lumber or establish design values. Accordingly ... SP Machine Stress Rated (MSR). Table 1 Floor Joists – 30 psf live ... Machine Stress Rated (MSR) Lumber ... SPIB states, "For MSR products, the phrase "MSR" or "machine rated" must appear, and the grade name consists of two numbers ... 4E MSR lumber by the North- eastern Lumber. Manufacturer's Association with the assistance of the Southern Pine Inspection. Bureau. The lumber was used to ... ... (MSR) lumber, laminated veneer lumber (LVL) and LVL flanged I-joists. The MSR Lumber had a higher torsional rigidity than both the LVL and LVL I-joists. CBLs ... Product Overview. These 2 x 4 MSR 2100 boards are made of Spruce-Pine-Fir (SPF). Spruce-Pine-Fir (SPF) is ideal for its high fiber strength and workability, ... Machine Stress Rated lumber (MSR) is evaluated by mechanical stress rating equipment. MSR lumber differs from visually graded lumber in that each piece is ...