Technical Specifications

ESR-1767
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Most Widely Accepted and Trusted Page 3 of 5
TABLE 2—LOAD CAPACITIES OF ADJUSTABLE COLUMNS
1,2,3
Dia (in) 3 3.5 3.5 3.5 4 4
Nom,
thickness
(in)
0.12 0.12 0.216 0.216 0.12 0.226
Design
thickness
(in)
0.112 0.112 0.201 0.201 0.112 0.210
Fy (ksi) 42 42 33 42 42 42
Capacity (kips)
Max length
(in)
LRFD
Φ
c
P
n
ASD P
a
LRFD
Φ
c
P
n
ASD P
a
LRFD
Φ
c
P
n
ASD P
a
LRFD
Φ
c
P
n
ASD P
a
LRFD
Φ
c
P
n
ASD P
a
LRFD
Φ
c
P
n
ASD P
a
76 20.3 13.5 25.6 17.0 36.0 23.9 44.0 29.3 30.7 20.4 55.3 36.8
79 19.9 13.3 25.2 16.8 35.6 23.7 43.3 28.8 30.4 20.2 54.7 36.4
82 19.5 13.0 24.8 16.5 35.1 23.4 42.6 28.4 30.0 20.0 54.1 36.0
85 19.1 12.7 24.5 16.3 34.7 23.1 41.9 27.9 29.7 19.7 53.4 35.5
88 18.6 12.4 24.1 16.0 34.2 22.8 41.2 27.4 29.3 19.5 52.7 35.1
91 18.2 12.1 23.6 15.7 33.8 22.5 40.5 26.9 28.9 19.3 52.0 34.6
94 17.7 11.8 23.2 15.5 33.3 22.1 39.7 26.4 28.6 19.0 51.3 34.1
97 17.3 11.5 22.8 15.2 32.8 21.8 39.0 25.9 28.2 18.7 50.6 33.6
100 16.8 11.2 22.4 14.9 32.3 21.5 38.2 25.4 27.8 18.5 49.8 33.1
103 16.3 10.9 21.9 14.6 31.8 21.1 37.4 24.9 27.4 18.2 49.1 32.6
106 15.9 10.6 21.5 14.3 31.2 20.8 36.6 24.4 26.9 17.9 48.3 32.1
109 15.4 10.2 21.0 14.0 30.7 20.4 35.8 23.8 26.5 17.6 47.5 31.6
112 14.9 9.9 20.6 13.7 30.2 20.1 35.0 23.3 26.1 17.4 46.7 31.1
115 14.4 9.6 20.1 13.4 29.6 19.7 34.1 22.7 25.7 17.1 45.9 30.5
118 14.0 9.3 19.6 13.1 29.1 19.3 33.3 22.2 25.2 16.8 45.0 30.0
121 13.5 9.0 19.2 12.8 28.5 19.0 32.5 21.6 24.8 16.5 44.2 29.4
124 13.0 8.7 18.7 12.4 27.9 18.6 31.6 21.0 24.3 16.2 43.4 28.8
127 12.5 8.3 18.2 12.1 27.4 18.2 30.8 20.5 23.9 15.9 42.5 28.3
130 12.1 8.0 17.7 11.8 26.8 17.8 29.9 19.9 23.4 15.6 41.6 27.7
133 11.6 7.7 17.3 11.5 26.2 17.4 29.1 19.3 22.9 15.3 40.8 27.1
136 11.1 7.4 16.8 11.2 25.6 17.0 28.2 18.8 22.5 14.9 39.9 26.5
139 10.7 7.1 16.3 10.8 25.0 16.6 27.4 18.2 22.0 14.6 39.0 25.9
142 10.2 6.8 15.8 10.5 24.4 16.3 26.5 17.6 21.5 14.3 38.1 25.4
145 10.0 6.6 15.4 10.2 23.8 15.9 25.7 17.1 21.0 14.0 37.2 24.8
For SI: 1 inch = 25.4 mm; 1 kip = 1000 lbf = 4.45 kN.
Notes:
1
This is based on standard installation, which assumes that the ends are supported such that both ends are fixed from translation but free to
rotate.
2
All capacities are based on AISC design method and testing.
3
The length given for adjustable columns includes the maximum 4 inch projection of the screw assembly. (For example, the 76-inch-long
adjustable column has a 72 inch long tube and a 4 inch long screw assembly.)