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 )
|