SpanRef

Span tables

30 psf live · 10 psf dead · L/360

Floor Joists — 30 psf Live Load (Sleeping Areas)

Bedrooms and attic floors (sleeping areas). Spans are for repetitive members (three or more). Southern Pine values reflect the SPIB design values referenced by the IRC.

Source: International Residential Code (IRC), 2018 — Table R502.3.1(1) — Floor Joist Spans, 30 psf Live Load. Published by International Code Council.

SpacingSpecies & grade2x62x82x102x12
12″ o.c.Douglas Fir-Larch · SS12′-6″16′-6″21′-0″25′-7″
12″ o.c.Douglas Fir-Larch · #112′-0″15′-10″20′-3″24′-8″
12″ o.c.Douglas Fir-Larch · #211′-10″15′-7″19′-10″23′-4″
12″ o.c.Douglas Fir-Larch · #39′-11″12′-7″15′-5″17′-10″
12″ o.c.Hem-Fir · SS11′-10″15′-7″19′-10″24′-2″
12″ o.c.Hem-Fir · #111′-7″15′-3″19′-5″23′-7″
12″ o.c.Hem-Fir · #211′-0″14′-6″18′-6″22′-6″
12″ o.c.Hem-Fir · #39′-8″12′-4″15′-0″17′-5″
12″ o.c.Spruce-Pine-Fir · SS11′-7″15′-3″19′-5″23′-7″
12″ o.c.Spruce-Pine-Fir · #111′-3″14′-11″19′-0″23′-0″
12″ o.c.Spruce-Pine-Fir · #211′-3″14′-11″19′-0″23′-0″
12″ o.c.Spruce-Pine-Fir · #39′-8″12′-4″15′-0″17′-5″
12″ o.c.Southern Pine · SS12′-3″16′-2″20′-8″25′-1″
12″ o.c.Southern Pine · #111′-10″15′-7″19′-10″24′-2″
12″ o.c.Southern Pine · #211′-3″14′-11″18′-1″21′-4″
12″ o.c.Southern Pine · #39′-2″11′-6″14′-0″16′-6″
16″ o.c.Douglas Fir-Larch · SS11′-4″15′-0″19′-1″23′-3″
16″ o.c.Douglas Fir-Larch · #110′-11″14′-5″18′-5″21′-4″
16″ o.c.Douglas Fir-Larch · #210′-9″14′-2″17′-5″20′-3″
16″ o.c.Douglas Fir-Larch · #38′-7″10′-11″13′-4″15′-5″
16″ o.c.Hem-Fir · SS10′-9″14′-2″18′-0″21′-11″
16″ o.c.Hem-Fir · #110′-6″13′-10″17′-8″21′-1″
16″ o.c.Hem-Fir · #210′-0″13′-2″16′-10″19′-8″
16″ o.c.Hem-Fir · #38′-5″10′-8″13′-0″15′-1″
16″ o.c.Spruce-Pine-Fir · SS10′-6″13′-10″17′-8″21′-6″
16″ o.c.Spruce-Pine-Fir · #110′-3″13′-6″17′-2″19′-11″
16″ o.c.Spruce-Pine-Fir · #210′-3″13′-6″17′-2″19′-11″
16″ o.c.Spruce-Pine-Fir · #38′-5″10′-8″13′-0″15′-1″
16″ o.c.Southern Pine · SS11′-2″14′-8″18′-9″22′-10″
16″ o.c.Southern Pine · #110′-9″14′-2″18′-0″21′-4″
16″ o.c.Southern Pine · #210′-3″13′-3″15′-8″18′-6″
16″ o.c.Southern Pine · #37′-11″10′-0″11′-1″14′-4″
19.2″ o.c.Douglas Fir-Larch · SS10′-8″14′-1″18′-0″21′-10″
19.2″ o.c.Douglas Fir-Larch · #110′-4″13′-7″16′-9″19′-6″
19.2″ o.c.Douglas Fir-Larch · #210′-1″13′-0″15′-11″18′-6″
19.2″ o.c.Douglas Fir-Larch · #37′-10″10′-0″12′-2″14′-1″
19.2″ o.c.Hem-Fir · SS10′-1″13′-4″17′-0″20′-8″
19.2″ o.c.Hem-Fir · #19′-10″13′-0″16′-7″19′-3″
19.2″ o.c.Hem-Fir · #29′-5″12′-5″15′-6″17′-1″
19.2″ o.c.Hem-Fir · #37′-8″9′-9″11′-10″13′-9″
19.2″ o.c.Spruce-Pine-Fir · SS9′-10″13′-0″16′-7″20′-2″
19.2″ o.c.Spruce-Pine-Fir · #19′-8″12′-9″15′-8″18′-3″
19.2″ o.c.Spruce-Pine-Fir · #29′-8″12′-9″15′-8″18′-3″
19.2″ o.c.Spruce-Pine-Fir · #37′-8″9′-9″11′-10″13′-9″
19.2″ o.c.Southern Pine · SS10′-6″13′-10″17′-8″21′-6″
19.2″ o.c.Southern Pine · #110′-1″13′-4″16′-5″19′-6″
19.2″ o.c.Southern Pine · #29′-6″12′-1″14′-4″16′-10″
19.2″ o.c.Southern Pine · #37′-3″9′-1″11′-0″13′-1″
24″ o.c.Douglas Fir-Larch · SS9′-11″13′-1″16′-8″20′-3″
24″ o.c.Douglas Fir-Larch · #19′-7″12′-4″15′-0″17′-5″
24″ o.c.Douglas Fir-Larch · #29′-3″11′-8″14′-3″16′-6″
24″ o.c.Douglas Fir-Larch · #37′-0″8′-11″10′-11″12′-7″
24″ o.c.Hem-Fir · SS9′-4″12′-4″15′-9″19′-2″
24″ o.c.Hem-Fir · #19′-2″12′-1″14′-10″17′-2″
24″ o.c.Hem-Fir · #28′-9″11′-4″13′-10″16′-1″
24″ o.c.Hem-Fir · #36′-10″8′-8″10′-7″12′-4″
24″ o.c.Spruce-Pine-Fir · SS9′-2″12′-1″15′-5″18′-9″
24″ o.c.Spruce-Pine-Fir · #18′-11″11′-6″14′-1″16′-3″
24″ o.c.Spruce-Pine-Fir · #28′-11″11′-6″14′-1″16′-3″
24″ o.c.Spruce-Pine-Fir · #36′-10″8′-8″10′-7″12′-4″
24″ o.c.Southern Pine · SS9′-9″12′-10″16′-5″19′-11″
24″ o.c.Southern Pine · #19′-4″12′-4″14′-8″17′-5″
24″ o.c.Southern Pine · #28′-6″10′-10″12′-10″15′-1″
24″ o.c.Southern Pine · #36′-5″8′-2″9′-10″11′-8″
Floor Joists — 30 psf Live Load (Sleeping Areas). Live load 30 psf, dead load 10 psf, deflection limit L/360. Spans in feet-inches; “—” means the source leaves that cell blank.

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2x6 Douglas Fir-Larch · 12″ o.c.2x6 Douglas Fir-Larch · 16″ o.c.2x6 Douglas Fir-Larch · 19.2″ o.c.2x6 Douglas Fir-Larch · 24″ o.c.2x8 Douglas Fir-Larch · 12″ o.c.2x8 Douglas Fir-Larch · 16″ o.c.2x8 Douglas Fir-Larch · 19.2″ o.c.2x8 Douglas Fir-Larch · 24″ o.c.2x10 Douglas Fir-Larch · 12″ o.c.2x10 Douglas Fir-Larch · 16″ o.c.2x10 Douglas Fir-Larch · 19.2″ o.c.2x10 Douglas Fir-Larch · 24″ o.c.2x12 Douglas Fir-Larch · 12″ o.c.2x12 Douglas Fir-Larch · 16″ o.c.2x12 Douglas Fir-Larch · 19.2″ o.c.2x12 Douglas Fir-Larch · 24″ o.c.2x6 Hem-Fir · 12″ o.c.2x6 Hem-Fir · 16″ o.c.2x6 Hem-Fir · 19.2″ o.c.2x6 Hem-Fir · 24″ o.c.2x8 Hem-Fir · 12″ o.c.2x8 Hem-Fir · 16″ o.c.2x8 Hem-Fir · 19.2″ o.c.2x8 Hem-Fir · 24″ o.c.2x10 Hem-Fir · 12″ o.c.2x10 Hem-Fir · 16″ o.c.2x10 Hem-Fir · 19.2″ o.c.2x10 Hem-Fir · 24″ o.c.2x12 Hem-Fir · 12″ o.c.2x12 Hem-Fir · 16″ o.c.2x12 Hem-Fir · 19.2″ o.c.2x12 Hem-Fir · 24″ o.c.2x6 Spruce-Pine-Fir · 12″ o.c.2x6 Spruce-Pine-Fir · 16″ o.c.2x6 Spruce-Pine-Fir · 19.2″ o.c.2x6 Spruce-Pine-Fir · 24″ o.c.2x8 Spruce-Pine-Fir · 12″ o.c.2x8 Spruce-Pine-Fir · 16″ o.c.2x8 Spruce-Pine-Fir · 19.2″ o.c.2x8 Spruce-Pine-Fir · 24″ o.c.2x10 Spruce-Pine-Fir · 12″ o.c.2x10 Spruce-Pine-Fir · 16″ o.c.2x10 Spruce-Pine-Fir · 19.2″ o.c.2x10 Spruce-Pine-Fir · 24″ o.c.2x12 Spruce-Pine-Fir · 12″ o.c.2x12 Spruce-Pine-Fir · 16″ o.c.2x12 Spruce-Pine-Fir · 19.2″ o.c.2x12 Spruce-Pine-Fir · 24″ o.c.2x6 Southern Pine · 12″ o.c.2x6 Southern Pine · 16″ o.c.2x6 Southern Pine · 19.2″ o.c.2x6 Southern Pine · 24″ o.c.2x8 Southern Pine · 12″ o.c.2x8 Southern Pine · 16″ o.c.2x8 Southern Pine · 19.2″ o.c.2x8 Southern Pine · 24″ o.c.2x10 Southern Pine · 12″ o.c.2x10 Southern Pine · 16″ o.c.2x10 Southern Pine · 19.2″ o.c.2x10 Southern Pine · 24″ o.c.2x12 Southern Pine · 12″ o.c.2x12 Southern Pine · 16″ o.c.2x12 Southern Pine · 19.2″ o.c.2x12 Southern Pine · 24″ o.c.