How Far Can I Joists Span
With These Factors, the Lightest Joist Will Have a Maximum Span of 17 Feet, 8 Inches. This Is the Most Common as the Typical Span Is 15 Feet. the Heaviest...
With these factors, the lightest joist will have a maximum span of 17 feet, 8 inches. This is the most common as the typical span is 15 feet. The heaviest joist, along with the above factors, will span a maximum of 23 feet, 8 inches.
What size lumber can span 15 feet?
A 2×12 with an E of 800,000 psi and Fb of 790 psi also works, since it can span 15 feet and 10 inches.
What size floor joist do I need for a 16 foot span?
Maximum Span (ft – in)Nominal Size (inches)Joist Spacing Center to Center (inches)Lumber Grade2 x 82410′ – 5″2 x 101216′ – 8″1615′ – 2″
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