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There are three common floor systems available in today's housebuilding industry. Let's look at the pro's & cons of each.
SOLID LUMBER - This is the oldest system available. It is the most affordable. Yet, it has shorter spans. Limited openings (for piping and electrical) can be drilled into the joists. Mechanical ducts can only run parallel/between joists or must run below the joists.
I-JOIST - These are mid-ranged in pricing. They can span farther than solid lumber, and tend to feel more solid. Like lumber, only very limited openings can be drilled into I-Joists.
OPEN-WEB TRUSSES - These can span the furthest and tend to feel the most solid. The biggest advantage is being able to run all HVAC ducts through the joists - allowing for clear, high ceilings with no soffits. And with these advantages, trusses tend to be the most expensive. However, if you are having a finished basement that will be used on a daily basis, they tend to be the best!
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