Field reference / sourced data

Deck joist span assumption table

Review selected DCA 6 deck joist spans with species, grade, size, spacing, load, service, treatment, deflection, use, and edition visible. Values support planning estimates; check the current product sheet and local code before purchase or construction.

Deck joist span assumption table
Species	Grade	Size	Spacing	Load	Deflection	Service	Treatment	Use	Edition	Max span
Southern Pine	No.2	2x6	12 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	9.9 ft
Southern Pine	No.2	2x6	16 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	9 ft
Southern Pine	No.2	2x6	24 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	7.7 ft
Southern Pine	No.2	2x8	12 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	13.1 ft
Southern Pine	No.2	2x8	16 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	11.1 ft
Southern Pine	No.2	2x8	24 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	9.1 ft
Southern Pine	No.2	2x10	12 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	16.2 ft
Southern Pine	No.2	2x10	16 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	14 ft
Southern Pine	No.2	2x10	24 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	11.5 ft
Douglas Fir-Larch	No.2	2x8	12 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	12.6 ft
Douglas Fir-Larch	No.2	2x8	16 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	11 ft
Douglas Fir-Larch	No.2	2x8	24 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	9 ft
Hem-Fir	No.2	2x8	12 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	12.6 ft
Hem-Fir	No.2	2x8	16 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	11 ft
Hem-Fir	No.2	2x8	24 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	9 ft
SPF	No.2	2x8	12 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	11.7 ft
SPF	No.2	2x8	16 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	10.2 ft
SPF	No.2	2x8	24 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	8.4 ft
Redwood	No.2	2x8	12 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	11.8 ft
Redwood	No.2	2x8	16 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	10.3 ft
Redwood	No.2	2x8	24 in OC	40+10 psf	L/360	wet	incised-pressure-treated	deck	DCA6 2015	8.5 ft

Source: American Wood Council DCA 6 Table 2. Edition: DCA6 2015. Retrieved 2026-09-05.