Southern Pine Products (Southern Forest Products Association)

SOUTHERN PINE SPAN TABLES

Maximum spans given in feet and inches
Inside to inside of bearings

Table 8 Wet-Service Floor Joists

Design Criteria:	Deflection - limited to span in inches divided by 360 (live load only).
	Strength - based on 40, or 60 pounds per square foot (psf) live load, plus 10 psf dead load.

	Size (inches) and Spacing (inches on center)
		2 x 6			2 x 8			2 x 10			2 x 12
Grade	Live Load	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc
No.1	40 psf	10-7	9-7	8-5	13-11	12-8	11-1	17-9	16-2	13-5	21-7	19-8	16-1
No.1	60 psf	9-3	8-5	7-4	12-2	11-1	9-7	15-6	13-11	11-4	18-10	16-7	13-7
No. 2	40 psf	10-4	9-5	7-10	13-8	12-5	10-1	17-5	15-10	13-2	21-2	18-10	15-4
No. 2	60 psf	9-1	8-1	6-8	11-11	10-6	8-7	15-2	13-7	11-1	18-4	15-11	13-0
No. 3	40 psf	9-4	8-1	6-7	11-11	10-3	8-5	14-0	12-2	9-11	16-8	14-5	11-10
No. 3	60 psf	7-11	6-10	5-7	10-0	8-8	7-1	11-10	10-3	8-5	14-1	12-3	10-0

Table 9 Rafters - Drywall or No Finished Ceiling - Construction Load (CD=1.25)¹

Design Criteria:	Deflection - limited to span in inches divided by 240 or 180 (live load only).
	Strength - based on 20 pounds per square foot (psf) live load, plus 10 psf dead load.

	Size (inches) and Spacing (inches on center)
		2 x 6			2 x 8			2 x 10			2 x 12
Grade	Deflection	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc
No.1	240	15-9	14-4	12-6	20-10	18-11	16-6	26-0*	24-1	21-1	26-0*	26-0*	25-2
No.1	180	17-4	15-9	13-9	22-11	20-10	17-9	26-0*	25-10	21-1	26-0*	26-0*	25-2
No. 2	240	15-6	14-1	12-3	20-5	18-6	15-10	26-0*	23-2	18-11	26-0*	26-0*	22-2
No. 2	180	17-0	15-1	12-4	22-5	19-5	15-10	26-0*	23-2	18-11	26-0*	26-0*	22-2
No. 3	240	13-6	11-8	9-6	17-2	14-10	12-2	20-3	17-7	14-4	24-1	20-10	17-0
No. 3	180	13-6	11-8	9-6	17-2	14-10	12-2	20-3	17-7	14-4	24-1	20-10	17-0

Table 10 Rafters - Drywall Ceiling - Snow Load (CD=1.15)¹

Design Criteria:	Deflection - limited to span in inches divided by 240 (live load only).
	Strength - based on 30 or 40 pounds per square foot (psf) live load, plus 10 psf dead load

	Size (inches) and Spacing (inches on center)
		2 x 6			2 x 8			2 x 10			2 x 12
Grade	Live Load	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc
No.1	30 psf	13-9	12-6	10-11	18-2	16-6	14-5	23-2	21-1	17-6	26-0*	25-7	20-10
No.1	40 psf	12-6	11-5	9-11	16-6	15-0	13-1	21-1	19-2	15-8	25-7	22-10	18-8
No. 2	30 psf	13-6	12-3	10-2	17-10	16-2	13-2	22-3	19-3	15-9	26-0*	22-7	18-5
No. 2	40 psf	12-3	11-2	9-1	16-2	14-5	11-10	19-11	17-3	14-1	23-4	20-2	16-6
No. 3	30 psf	11-2	9-8	7-11	14-3	12-4	10-1	16-10	14-7	11-11	20-0	17-4	14-2
No. 3	40 psf	10-0	8-8	7-1	12-9	11-0	9-0	15-1	13-0	10-8	17-11	15-6	12-8

Table 11 Rafters - No Finished Ceiling - Snow Load (CD=1.15)¹

Design Criteria:	Deflection - limited to span in inches divided by 180 (live load only).
	Strength - based on 30 or 40 pounds per square foot (psf) live load, plus 10 psf dead load.

	Size (inches) and Spacing (inches on center)
		2 x 4			2 x 6			2 x 8			2 x 10
Grade	Live Load	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc	12" oc	16" oc	24" oc
No.1	30 psf	9-8	8-9	7-8	15-2	13-9	11-9	20-0	18-0	14-9	24-9	21-5	17-6
No.1	40 psf	8-9	8-0	7-0	13-9	12-6	10-6	18-2	16-2	13-2	22-2	19-2	15-8
No. 2	30 psf	9-6	8-7	7-1	14-5	12-6	10-2	18-8	16-2	13-2	22-3	19-3	15-9
No. 2	40 psf	8-7	7-9	6-4	12-11	11-2	9-1	16-8	14-5	11-10	19-11	17-3	14-1
No. 3	30 psf	7-7	6-7	5-4	11-2	9-8	7-11	14-3	12-4	10-1	16-10	14-7	11-11
No. 3	40 psf	6-9	5-10	4-9	10-0	8-8	7-1	12-9	11-0	9-0	15-1	13-0	10-8

* The listed maximum span has been limited to 26' - 0" based on material availability. Check sources of supply for lumber longer than 20'. (1) C_D= duration of load factor. See page 12 for additional information on adjustment factors.

Southern Pine Products - Page 14