Description |
Symbol Units |
MT-20 MT-20 OC |
MT-30 S MT-30 MT-30 S OC MT-30 OC
MT-50 S MT-50 MT-50 S OC MT-50 OC
MT-60 S MT-60 MT-60 S OC MT-60 OC
|
Design thickness |
t |
in
( mm)
|
0.069
( 1.75)
|
0.079
( 2)
|
0.108
( 2.75)
|
0.108
( 2.75)
|
Width |
- |
in
( mm)
|
1.10
( 28)
|
1.67
( 42.5)
|
1.67
( 42.5)
|
1.67
( 42.5)
|
Depth |
- |
in
( mm)
|
1.67
( 42.5)
|
0.91
( 23)
|
1.67
( 42.5)
|
2.83
( 72)
|
Weight |
w |
lbs / ft
( kg / m)
|
0.84
( 1.25)
|
1.1
( 1.64)
|
1.97
( 2.93)
|
2.83
( 4.21)
|
Minimum specified yield strength |
F y |
ksi
( MPa)
|
40.6
( 280)
|
40.6
( 280)
|
40.6
( 280)
|
40.6
( 280)
|
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)
|
0.291
( 187.59)
|
0.322
( 207.95)
|
0.583
( 376.02)
|
0.834
( 538.27)
|
Moment of inertia of the gross section about x-axis |
I x |
in 4
( mm 4)
|
0.0489
( 20,349)
|
0.0351
( 14,621)
|
0.2033
( 84,619)
|
0.7904
( 329,006)
|
Moment of inertia of the gross section about y-axis |
I y |
in 4
( mm 4)
|
0.1272
( 52,943)
|
0.1274
( 53,018)
|
0.2611
( 108,670)
|
0.4153
( 172,864)
|
Gross section-modulus about x-axis |
S x |
in 3
( mm 3)
|
0.0742
( 1,216)
|
0.067
( 1,098)
|
0.2165
( 3,548)
|
0.5146
( 8,432)
|
Gross section-modulus about y-axis |
S y |
in 3
( mm 3)
|
0.152
( 2,491)
|
0.1523
( 2,495)
|
0.3121
( 5,114)
|
0.4964
( 8,135)
|
Radius of gyration of the gross section about x-axis |
r x |
in
( mm)
|
0.41
( 10.42)
|
0.33
( 8.39)
|
0.591
( 15)
|
0.973
( 24.72)
|
Radius of gyration of the gross section about y-axis |
r y |
in
( mm)
|
0.661
( 16.8)
|
0.629
( 15.97)
|
0.669
( 17)
|
0.706
( 17.92)
|
Effective moment of inertia about x-axis |
I x-eff |
in 4
( mm 4)
|
0.0443
( 18,439)
|
0.0327
( 13,594)
|
0.2005
( 83,452)
|
0.7802
( 324,725)
|
Effective moment of inertia about y-axis |
I y-eff |
in 4
( mm 4)
|
0.0901
( 37,509)
|
0.1264
( 52,608)
|
0.2611
( 108,664)
|
0.4153
( 172,858)
|
Effective section modulus about x-axis at stress = F y |
S x-eff |
in 3
( mm 3)
|
0.0673
( 1,102)
|
0.0623
( 1,021)
|
0.2135
( 3,499)
|
0.5079
( 8,323)
|
Effective section modulus about y-axis at stress = F y |
S y-eff |
in 3
( mm 3)
|
0.1077
( 1,765)
|
0.1511
( 2,476)
|
0.3121
( 5,114)
|
0.4964
( 8,135)
|
Allowable bending moment based on local buckling about x-axis( Ω b = 1.67) |
M a-x |
k-in
( kN m)
|
1.845
( 0.208)
|
1.92
( 0.216)
|
6.8
( 0.768)
|
15.53
( 1.755)
|
Allowable bending moment based on local buckling about y-axis( Ω b = 1.67) |
M a-y |
k-in
( kN m)
|
2.88
( 0.325)
|
4.21
( 0.476)
|
8.46
( 0.956)
|
12.8
( 1.446)
|
Allowable bending moment for distortional buckling about x-axis based on Kϕ = 0( Ω b = 1.67) |
M ad-x |
k-in
( kN m)
|
1.685
( 0.19)
|
1.77
( 0.199)
|
6.03
( 0.682)
|
12.41
( 1.402)
|
Allowable bending moment for distortional buckling about y-axis based on Kϕ = 0( Ω b = 1.67) |
M ad-y |
k-in
( kN m)
|
2.501
( 0.283)
|
3.79
( 0.428)
|
8.46
( 0.956)
|
11.88
( 1.342)
|
Allowable shear about x-axis( Ω v = 1.6) |
V a-x |
lbs
( N)
|
1,466
( 6,516)
|
1,629
( 7,240)
|
2,103
( 9,348)
|
2,103
( 9,348)
|
Allowable shear about y-axis( Ω v = 1.6) |
V a-y |
lbs
( N)
|
1,735
( 7,712)
|
1,416
( 6,295)
|
4,205
( 18,691)
|
8,036
( 35,720)
|
St. Venant Torsional Constant |
J |
in 4
( mm 4)
|
0.0005
( 191.50)
|
0.0007
( 277.26)
|
0.0023
( 947.89)
|
0.0033
( 1,356.90)
|
Torsional Warping Constant |
C w |
in 6
( mm 6)
|
0.0368
( 9,881,442)
|
0.0323
( 8,685,395)
|
0.1593
( 42,771,610)
|
0.5991
( 160,884,400)
|
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)
|
0.988
( 25.1)
|
0.868
( 22.05)
|
1.579
( 40.11)
|
2.740
( 69.59)
|
Distance from shear center to centroid to mid-plane of web |
m |
in
( mm)
|
0.60
( 15.1)
|
0.45
( 11.4)
|
0.90
( 22.9)
|
1.50
( 38.0)
|
Net polar radius of gyration about the shear center |
r 0 |
in
( mm)
|
1.258
( 31.95)
|
1.122
( 28.49)
|
1.814
( 46.07)
|
2.992
( 76.00)
|