Structural Span Table
SPAN CHARTS: Decking Mode | Joist Mode, 16″ on Center | Joist Mode, 24″ on Center
Decking Mode (60 Lb/Sq Foot Live Load)
SIZE
THICKNESS (Actual Size)
INCHES (Maximum Span)
FEET
5/4 X 4,6,8
1.125
24.3
2
2 x 6,8,10,12
1.5
32.1
2.7
3 x 4,6,8,10,12
2.4
50.3
4.2
4 x 4,6,8
3.4
69.8
5.8
5 x 5
4.4
88.7
7.4
6 x 6,8,12
5.4
106.8
8.9
Decking Mode (100 Lb/Sq Foot Live Load)
SIZE
THICKNESS (Actual Size)
INCHES (Maximum Span)
FEET
5/4 X 4,6,8
1.125
20.7
1.7
2 x 6,8,10,12
1.5
27.4
2.3
3 x 4,6,8,10,12
2.4
43.4
3.6
4 x 4,6,8
3.4
60.6
5.1
5 x 5
4.4
77.4
6.5
6 x 6,8,12
5.4
93.9
7.8
Decking Mode (150 Lb/Sq Foot Live Load)
SIZE
THICKNESS (Actual Size)
INCHES (Maximum Span)
FEET
5/4 X 4,6,8
1.125
18.2
1.5
2 X 6,8,10,12
1.5
24.1
2
3 X 4,6,8,10,12
2.4
38.3
3.2
4 X 4,6,8
3.4
53.7
4.5
5 X 5
4.4
68.9
5.7
6 X 6,8,12
5.4
83.9
7
Decking Mode (200 Lb/Sq Foot Live Load)
SIZE
THICKNESS (Actual Size)
INCHES (Maximum Span)
FEET
5/4 X 4,6,8
1.125
16.6
1.4
2 x 6,8,10,12
1.5
22
1.8
3 X 4,6,8,10,12
2.4
35
2.9
4 x 4,6,8
3.4
49.2
4.1
5 x 5
4.4
63.2
5.3
6 x 6,8,12
5.4
77.1
6.4
bm