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What size lumber can span 20 feet | Floor Joist, Ceiling joist, rafter & beam size for a 20 ft span

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What size lumber can span 20 feet?

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What size lumber can span 22 feet | Floor Joist, Ceiling joist, rafter & beam size for a 22 ft span

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Wood I-Joist Size | What size i joist to span 16 feet

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What size lumber can span 15 feet | Floor Joist, Ceiling joist, rafter & beam size for a 15 ft span

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What size lumber can span 18 feet | Floor Joist, Ceiling joist, rafter & beam size for a 18 ft span

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