Free Concrete Box U-Girder Properties Calculator
Compute Area, Centroid, Moment of Inertia, Elastic and Plastic Section Moduli, and Radius of Gyration instantly. Enter dimensions manually or load standard steel databases.
⚙ Configuration
Section Geometry
Steel
Cold-Formed
Concrete
I-Section
Channel
T-Section
Angle
Double Angle
Box Section
Pipe
Dbl Channel
Builtup I Cov
Hybrid I
Hybrid U
Unit System
mm
cm
m
in
ft
No pre-loaded standard profiles in this category.
Dimension Settings
Depth/Diameter (t3)
t3
mm
Top Width (b1)
b1
mm
Fillet Width (b2)
b2
mm
Web Width (b3)
b3
mm
Bottom Width (b4)
b4
mm
Top Depth (d1)
d1
mm
Top Slope Depth (d2)
d2
mm
Bottom Slope Depth (d3)
d3
mm
Bottom Depth (d4)
d4
mm
Web Thickness (tw)
tw
mm
Section Properties Results
Property
Sym
Value
Unit
Cross-sectional Area
A
722500
mm²
Centroid location (X-axis)
xc
800
mm
Centroid location (Y-axis)
yc
539.4464
mm
Strong Moment of Inertia
Ix
122462236880.0461
mm⁴
Weak Moment of Inertia
Iy
154273958333.3333
mm⁴
Strong Elastic Modulus
Sx
185393328.7498
mm³
Weak Elastic Modulus
Sy
192842447.9167
mm³
Strong Radius of Gyration
rx
411.7012
mm
Weak Radius of Gyration
ry
462.0909
mm
Polar Moment of Inertia
J
276736195213.3795
mm⁴
🔍 Detailed Step-by-Step Derivation
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