Species
Southern Pine
Grades
(Ctrl-Click to select multiple grades)
No. 1
No. 2
No. 3
1500f-1.6E (MSR)
2100f-1.8E (MSR)
2400f-2.0E (MSR)
Required Horizontal Span
ft.
in.
Member Type
Floor Joist
Ceiling Joist
Rafter (Snow Load)
Rafter (Roof Live-Load)
Deflection Limit
L/480
L/360
L/240
L/180
Spacing (in)
12
16
19.2
24
Live Load (psf)
30
40
50
60
70
80
90
100
Dead Load (psf)
5
7
10
12
15
20
Wet service conditions?
No
Yes
Span Calculator for Wood Joists and Rafters
also available for the
Android
.
Span Calculator for Wood Joists and Rafters
available for the
iPhone and iPad
.