30K
28K
26K
24K
22K
18K
16K
Joist Designation
20K
14K
12K
10K
8K
8
12
16
20
24
28
32
36
40
44
48
52
56
60
Span (ft)
Assumptions:
1. These spans are based upon the SJI Specification, dated 1998.
2. Floors: Based upon 100 psf LL and 50 psf DL, the spacing of joists is between 1.67 ft o.c. and 3.67 ft o.c.
2. Roofs: Based upon 30 psf LL and 20 psf DL, the spacing of joists is between 4.0 ft o.c. and 11 ft o.c.
Approximate Span Table for K-Series Open Web Joists
72DLH
68DLH
64DLH
60DLH
56DLH
52DLH
48LH
44LH
Joist Designation
40LH
36LH
32LH
28LH
24LH
20LH
18LH
14
24
34
44
54
64
74
84
94
104
114
124
134
144
Span (ft)
Assumptions:
1. These spans are based upon the SJI Specification, dated 1998.
2. Floors: Based upon 100 psf LL and 50 psf DL, the spacing of joists is between 2.5 ft o.c. and 3.8 ft o.c.
2. Roofs: Based upon 30 psf LL and 20 psf DL, the spacing of joists is between 4.0 ft o.c. and 11 ft o.c.
Approximate Span Table for LH & DLH Series Open Web Joists