For your specific question, a "Glulam" is used for certain design properties which your rim joist doesn't warrant. Using actual glulams for floor joists is money wasted, there are better options.
In general though, many people have a sentiment that to build it "better," or "stronger," or to "last longer," they need to thicken, or double, or do redundant things without first understanding their purpose and what doing so actually accomplishes. There is a member on this forum that does everything like this, and what it shows is for most things it's really a psychological pacifier rather than a building science or reasoned action.
So bumping a sill plate up from a 2x6 to a 2x8 will not make your building last longer if the loads don't warrant it. I work on 120 year old houses with no sill plate whatsoever. What you have to do is think about each building system as a whole, then it's parts, and how to make those work right, obtaining quality materials, with the technology and knowledge that exists today. Because in the next 100 years, your house will probably be ripped apart anyway and rebuilt with new technology and knowledge for that time.
In general though, many people have a sentiment that to build it "better," or "stronger," or to "last longer," they need to thicken, or double, or do redundant things without first understanding their purpose and what doing so actually accomplishes. There is a member on this forum that does everything like this, and what it shows is for most things it's really a psychological pacifier rather than a building science or reasoned action.
So bumping a sill plate up from a 2x6 to a 2x8 will not make your building last longer if the loads don't warrant it. I work on 120 year old houses with no sill plate whatsoever. What you have to do is think about each building system as a whole, then it's parts, and how to make those work right, obtaining quality materials, with the technology and knowledge that exists today. Because in the next 100 years, your house will probably be ripped apart anyway and rebuilt with new technology and knowledge for that time.
