Joist Span Tables - Use these tables to determine maximum span of ceiling joists.

Spans for ceiling joists shall be in accordance with Table 2308.7.1 (1) or 2308.7.1 (2). For other grades and species, and other loading conditions, refer to the AWC STJR.

Spans for ceiling joists shall be in accordance with Tables R802.4 (1) and R802.4 (2). For other grades and species and for other loading conditions, refer to the AF&PA; Span Tables for …

SPFA has created 46 simplified maximum span tables based on common load conditions for floor joists, ceiling joists, and rafters for selected visual and mechanical grades of Southern Pine …

Oct 5, 2025 · Ceiling joist span chart and guide: Learn maximum spans, sizes, spacing, and how far a 2x6, 2x8, or 2x4 can go with or without support.

Learn more about BCI® Joists and our sizing software BC Calc® or view the US East and US West span and size charts.

Easily calculate ceiling joist spans with our free calculator. Get accurate results for safe, code-compliant building projects.

CEILING JOIST SPAN TABLE ALLOWABLE SPANS IN FEET & INCHES #2 Spruce-pine-fir (1.5 Modulus of Elasticity) (Roof slope not steeper than three units vertical on 12 units horizontal)

These span tables for joists and rafters are calculated on the basis of a series of modulus of elasticity (E) and bending design values (F b). Additionally, compression perpendicular to grain …

Joist and rafter span tables show the maximum distance these framing members can safely cover. The spans listed are based on the specific properties of the wood being used.