Wood Joist Span Table: Douglas Fir-Larch No.2, 2 × 10, 12 in o.c.
Specific conversion page with reference context, calculator, and nearby values.
On this page
Douglas Fir-Larch No.2, 2 × 10, 12 in o.c. converts to
20 ft 2 in
Use this as a quick reference for Wood Joist Span Table.
Value Details
Input: Douglas Fir-Larch No.2, 2 × 10, 12 in o.c.
Output: 20 ft 2 in
Browse all reference values for Wood Joist Span Table
speciesGroup: Douglas Fir-Larch No.2 | joistSize: 2 × 10 | spacingIn: 12 | spanInches: 242 | spanFeetDecimal: 20.17
Joist Span Lookup
Choose species group, joist size, and spacing to estimate maximum span.
Estimated Maximum Span
—
Nearby Reference Values
| Species Group | Joist Size | Spacing (in o.c.) | Max Span |
|---|---|---|---|
| Douglas Fir-Larch No.2 | 2 × 6 | 16 | 11 ft 5 in |
| Douglas Fir-Larch No.2 | 2 × 6 | 24 | 9 ft 4 in |
| Douglas Fir-Larch No.2 | 2 × 8 | 12 | 16 ft 6 in |
| Douglas Fir-Larch No.2 | 2 × 8 | 16 | 14 ft 8 in |
| Douglas Fir-Larch No.2 | 2 × 8 | 24 | 12 ft 1 in |
| Douglas Fir-Larch No.2 | 2 × 10 | 12 | 20 ft 2 in |
| Douglas Fir-Larch No.2 | 2 × 10 | 16 | 18 ft 0 in |
| Douglas Fir-Larch No.2 | 2 × 10 | 24 | 14 ft 9 in |
| Douglas Fir-Larch No.2 | 2 × 12 | 12 | 23 ft 2 in |
| Douglas Fir-Larch No.2 | 2 × 12 | 16 | 20 ft 8 in |
| Douglas Fir-Larch No.2 | 2 × 12 | 24 | 17 ft 0 in |
Frequently Asked Questions
Common questions about Wood Joist Span Table, formulas, and expected usage.
What loads are these span values based on?
These values are typical references based on common residential assumptions around 40 psf live load and 10 psf dead load.
Why does spacing change allowable span?
Wider on-center spacing means each joist supports more floor area, which reduces allowable span for a given size and species.
Can I use this instead of local building code tables?
Use this as a planning tool only. Final joist spans must follow your local code, species grade stamp, and project loading conditions.
Why are species groups separated?
Different wood species have different strength and stiffness properties, so allowable spans differ even with the same joist size.
Methodology and Review
This page is generated from the same conversion definition used by the main calculator page, which keeps the calculator, reference table rows, and FAQ schema aligned.
Reviewer and update metadata are shown above and included in structured data. See our editorial policy, review process, and corrections policy.
Use this page as a fast lookup reference, then confirm final project values using applicable standards and manufacturer documentation.