2-1/2 x 11-7/8x 20', I-joist, PJI40

Flanges are MSR 2x3’s and 2x4’s. Webs are OSB, and all are classified as Exposure 1 or Exterior and are 3/8” in thickness or greaterr. Often described as a 20 ft, 2-1/2 x 12 (nominal sizing), this product typically measures 2-1/2 in thick by 11-1/4 in wide. Appearance notes: No Surface Characteristics.