Final answer:
Lightweight wooden I-Beams are a combination of laminated veneer lumber (LVL) and oriented strand board (OSB). They have high strength-to-weight ratios and are commonly used in construction.
Step-by-step explanation:
Lightweight wooden I-Beams are a combination of two engineered wood products: laminated veneer lumber (LVL) and oriented strand board (OSB). LVL is made by gluing thin layers of wood veneers together, while OSB is made by arranging strands of wood in layers and bonding them with adhesive. By combining these two engineered wood products, lightweight wooden I-Beams are created that have high strength-to-weight ratios and are commonly used in construction.