Manufacturers claim that a PSL beam can span nearly 70 feet. To achieve additional strength and rigidity without increasing depth, PSL beams can be built up at the job site.

Bridge worker dies after beam collapses on new Twin Spans; nine others injured. Christine Harvey, The Times-Picayune; Oct 31, 2008 Oct 31, 2008; ... Concrete beam fails.

Customize for loads and spans. To minimize costs, make sure to specify glulam products based on the load and span requirements of the project. For example, glulam beams with high structural properties ...

Yes, certain joist products can achieve this span in real-world usage. It'll take a minimum of 2x10 @ 305mm spacing, and that only if your roof load is relatively light.