Description Symbol Units |
MT-70 S OC MT-70 OC |
MT-80 S OC MT-80 OC |
MT-90 S OC MT-90 OC |
MT-100 S OC MT-100 OC |
Profile of cross-section-- |
Design thickness |
t |
in
( mm)
|
0.108
( 2.75)
|
0.118
( 3)
|
0.118
( 3)
|
0.157
( 4)
|
Width |
- |
in
( mm)
|
1.97
( 50)
|
1.97
( 50)
|
3.94
( 100)
|
3.94
( 100)
|
Depth |
- |
in
( mm)
|
1.97
( 50)
|
3.94
( 100)
|
3.94
( 100)
|
5.91
( 150)
|
Weight |
w |
lbs / ft
( kg / m)
|
2.63
( 3.914)
|
4.43
( 6.593)
|
6.01
( 8.944)
|
10.0
( 14.882)
|
Minimum specified yield strength |
F y |
ksi
( MPa)
|
50.75
( 350)
|
50.75
( 350)
|
50.75
( 350)
|
50.75
( 350)
|
Modulus of elasticity |
E |
ksi
( MPa)
|
29,500
( 203,400)
|
29,500
( 203,400)
|
29,500
( 203,400)
|
29,500
( 203,400)
|
Gross cross-sectional area |
A g |
in 2
( mm 2)
|
0.775
( 500.28)
|
1.303
( 840.82)
|
1.768
( 1140.80)
|
2.937
( 1894.80)
|
Moment of inertia of the gross section about x-axis |
I x |
in 4
( mm 4)
|
0.4382
( 182,390)
|
2.5576
( 1,064,540)
|
4.2536
( 1,770,469)
|
14.2854
( 5,946,036)
|
Moment of inertia of the gross section about y-axis |
I y |
in 4
( mm 4)
|
0.4382
( 182,390)
|
0.8663
( 360,568)
|
4.2536
( 1,770,469)
|
7.654
( 3,185,651)
|
Gross section-modulus about x-axis |
S x |
in 3
( mm 3)
|
0.4452
( 7,296)
|
1.2993
( 21,291)
|
2.1608
( 35,409)
|
4.838
( 79,280)
|
Gross section-modulus about y-axis |
S y |
in 3
( mm 3)
|
0.4452
( 7,296)
|
0.8801
( 14,423)
|
2.1608
( 35,409)
|
3.888
( 63,713)
|
Radius of gyration of the gross section about x-axis |
r x |
in
( mm)
|
0.752
( 19.09)
|
1.401
( 35.58)
|
1.551
( 39.39)
|
2.205
( 56.02)
|
Radius of gyration of the gross section about y-axis |
r y |
in
( mm)
|
0.752
( 19.09)
|
0.815
( 20.71)
|
1.551
( 39.39)
|
1.614
( 41)
|
Effective moment of inertia about x-axis |
I x-eff |
in 4
( mm 4)
|
0.4382
( 182,390)
|
2.3832
( 991,957)
|
3.8584
( 1,605,985)
|
12.0259
( 5,005,546)
|
Effective moment of inertia about y-axis |
I y-eff |
in 4
( mm 4)
|
0.4382
( 182,390)
|
0.6451
( 268,521)
|
3.8584
( 1,605,985)
|
6.4751
( 2,695,127)
|
Effective section modulus about x-axis at stress = F y |
S x-eff |
in 3
( mm 3)
|
0.4452
( 7,296)
|
1.2107
( 19,839)
|
1.9601
( 32,120)
|
4.0728
( 66,741)
|
Effective section modulus about y-axis at stress = F y |
S y-eff |
in 3
( mm 3)
|
0.4452
( 7,296)
|
0.6555
( 10,741)
|
1.9601
( 32,120)
|
3.2894
( 53,903)
|
Allowable bending moment based on local buckling about x-axis( Ω b = 1.67) |
M a-x |
k-in
( kN m)
|
15.137
( 1.710)
|
41.759
( 4.718)
|
61.75
( 6.977)
|
134.73
( 15.222)
|
Allowable bending moment based on local buckling about y-axis( Ω b = 1.67) |
M a-y |
k-in
( kN m)
|
15.137
( 1.710)
|
21.008
( 2.374)
|
61.75
( 6.977)
|
101.91
( 11.514)
|
Allowable bending moment for distortional buckling about x-axis based on Kϕ = 0( Ω b = 1.67) |
M ad-x |
k-in
( kN m)
|
N. A. |
N. A. |
N. A. |
N. A. |
Allowable bending moment for distortional buckling about y-axis based on Kϕ = 0( Ω b = 1.67) |
M ad-y |
k-in
( kN m)
|
N. A. |
N. A. |
N. A. |
N. A. |
Allowable shear about x-axis( Ω v = 1.6) |
V a-x |
lbs
( N)
|
6,329
( 28,132)
|
6,727
( 29,902)
|
15,579
( 69,249)
|
19,828
( 88,135)
|
Allowable shear about y-axis( Ω v = 1.6) |
V a-y |
lbs
( N)
|
6,329
( 28,132)
|
12,723
( 56,554)
|
15,579
( 69,249)
|
31,631
( 140,600)
|
St. Venant Torsional Constant |
J |
in 4
( mm 4)
|
0.7146
( 297,456)
|
2.1217
( 883,107)
|
6.6870
( 2,783,333)
|
15.8713
( 6,606,148)
|
Torsional Warping Constant |
C w |
in 6
( mm 6)
|
0.00015
( 39,434)
|
0.1693
( 45,468,000)
|
0.0023
( 610,560)
|
1.2794
( 343,560,000)
|
Distance from the centroid to the shear center along the principal x-axis |
X 0 |
in
( mm)
|
0 |
0 |
0 |
0 |
Distance from the centroid to the shear center along the principal y-axis |
Y 0 |
in
( mm)
|
0 |
0 |
0 |
0 |
Net polar radius of gyration about the shear center |
r 0 |
in
( mm)
|
1.063
( 27.00)
|
1.621
( 41.17)
|
2.193
( 55.71)
|
2.733
( 69.42)
|