Tables listing Maximum Spans for Southern Pine joists and rafters are detailed below. These 46 tables are based upon design values for visually graded Southern Pine dimension lumber that became effective June 1, 2013. For each application, a PDF download is available. Also see Using These Tables and five Examples showing how to read the table values, plus other important information.

Refer to SFPA’s publication Southern Pine Maximum Spans for Joists & Rafters (download in Publications) that includes all 46 tables. Design assumptions and calculations using code-recognized procedures are explained.

Table NumberLive Load (psf)Dead Load (psf)Deflection Limit
MC = Moisture ContentCD = Load Duration Factor
Floor Joists
1
2
3
4
5
6
7
8
9
10
11
30
40
50
60
40
50
60
75
80
90
100
10
10
10
10
20
20
20
10
10
10
10
360
360
360
360
360
360
360
360
360
360
360
Wet-Service Floor Joists (MC > 19%)
12
13
14
40
60
100
10
10
10
360
360
360
Ceiling Joists
15
16
10
20
5
10
240
240
Rafters (Snow Load, CD = 1.15)
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
20
30
40
50
20
30
40
50
20
30
40
50
20
30
40
50
20
30
40
50
20
30
40
50
10
10
10
10
15
15
15
15
20
20
20
20
10
10
10
10
15
15
15
15
20
20
20
20
240
240
240
240
240
240
240
240
240
240
240
240
180
180
180
180
180
180
180
180
180
180
180
180
Rafters (Construction Load, CD = 1.25)
41
42
43
44
45
46
20
20
20
20
20
20
10
15
20
10
15
20
240
240
240
180
180
180