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If you’re just replacing a few broken or damaged joists, you can expect to pay anywhere from $100 to $300 per joist. However, a complete installation for a home or room will take into account the cost of labor, which ranges from $25 to $40 per hour. Floor joist installation for an entire room, for example, can cost between $5,000 and $10,000, depending on the room's size and the materials used.

Landscape timbers can last 10 to 20 years in the ground when installed correctly. Pressure-treated timbers will last longer than non-treated ones, as pressure treatment makes the wood more rot-resistant. Wood exposed to high moisture levels or extreme temperature and weather fluctuations may not last as long as wood in drier areas with more consistent weather.

It is not recommended to cut or drill into LVL (laminated veneer lumber) beams. As major structural components of a home, their composite structure can be compromised by alterations, which can weaken them and lead to cracking over time. If you must make modifications to an LVL beam, it is crucial to consult a structural engineer or general contractor first. A professional can advise on whether it's safe and provide specifics on the appropriate bit size, depth, and directionality for any necessary drilling.

Joists do distribute their load to beams, but they don’t sit on top of the beams. Instead, home builders nail or screw the joists directly to the beams such that the end of the joist butts up against the edge of the beam. Beams can sit on other beams for support, but you’ll never see a joist sitting on top of a beam or another joist.