What size I Beam to span 16 feet with a load of 10000 lbs?

To span 16 feet with a load of 10,000 lbs, a structural engineer would typically recommend an I-beam size based on specific calculations that consider factors such as the beam's material, load type (uniform or point load), and safety factors. Commonly, a W10x30 or W12x30 might be sufficient for this application, but exact specifications should be confirmed with engineering calculations to ensure safety and compliance with local building codes. Always consult with a structural engineer for precise recommendations tailored to your project.