Square Tubing Strength Calculator
Professional structural analysis for square hollow sections
Input Parameters
Analysis Results
Maximum Deflection
0.000 inchesMaximum Bending Stress
0.00 ksiSafety Factor
0.00Moment of Inertia
0.000 in⁴Section Modulus
0.000 in³Cross-Sectional Area
0.000 in²Weight per Foot
0.00 lbs/ftMaximum Safe Load
0 lbsCalculation Formulas
Moment of Inertia (I) for Hollow Square Section
Where W = outside width, t = wall thickness
Section Modulus (S)
Distance from neutral axis to extreme fiber
Deflection Formulas
Cantilever End Load: δ = (P × L³) / (3 × E × I)
Uniform Load: δ = (5 × w × L⁴) / (384 × E × I)
Where E = Modulus of Elasticity (29,000 ksi for steel, 10,000 ksi for aluminum)
Bending Stress
For center point load on simply supported beam
Cross-Sectional Area
Used for weight and axial load calculations
Material Properties
Steel Properties
A36 Steel: Yield Strength = 36 ksi, Density = 0.284 lb/in³
A572-50: Yield Strength = 50 ksi, Higher strength structural steel
A572-65: Yield Strength = 65 ksi, High-strength low-alloy steel
A514: Yield Strength = 80+ ksi, Quenched and tempered alloy steel
Aluminum Properties
6061-T6: Yield Strength = 40 ksi, Density = 0.098 lb/in³
6063-T6: Yield Strength = 35 ksi, Architectural applications
Modulus: 10,000 ksi (approximately 1/3 of steel)
Safety Considerations
Recommended Safety Factor: 2.0-4.0 for static loads
Dynamic Loads: Use higher safety factors (4.0-6.0)
Critical Applications: Consider fatigue, buckling, and connection strength
Applications & Design Guidelines
Common Applications
Structural Framework: Building frames, supports, brackets
Machinery: Machine frames, equipment supports
Automotive: Roll cages, chassis components
Architectural: Handrails, decorative elements
Design Considerations
Buckling: Check slenderness ratio for compression members
Connections: Weld and bolt capacity often governs design
Deflection Limits: L/240 for floors, L/360 for roofs typically
Vibration: Consider natural frequency for dynamic loads
Important Limitations
This calculator provides preliminary analysis only. For critical structural applications, consult a qualified structural engineer. Local building codes, dynamic effects, fatigue, and connection details must be considered in final design.