Structural Analysis
Comprehensive technical specifications for beam deflection calculations.
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Load Parameters
- Dead Load: 10-50 psf
- Live Load: 40-100 psf
- Point Load: 2000-5000 lbs
- Impact Factor: 1.15-1.33
- Load Duration: 1.0-1.6
- Safety Factor: 2.0-3.0
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Material Properties
- Steel E: 29×10⁶ psi
- Concrete E: 3.6×10⁶ psi
- Wood E: 1.6×10⁶ psi
- Poisson's Ratio: 0.2-0.35
- Yield Strength: 36-50 ksi
- Shear Modulus: 11.5×10⁶ psi
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Section Properties
- Moment of Inertia: I
- Section Modulus: S
- Radius of Gyration: r
- Shape Factor: 1.12-1.50
- Plastic Modulus: Z
- Torsion Constant: J
Deflection Limits
Critical specifications for structural performance:
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Service Limits
- Floor: L/360-L/480
- Roof: L/240-L/360
- Cantilever: L/180-L/240
- Ceiling: L/360
- Partition: L/360
- Glass Support: L/480
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Loading Conditions
- Total Load: L/240
- Live Load: L/360
- Wind Load: L/360
- Snow Load: L/240
- Seismic: 0.025h
- Creep Factor: 1.5-2.0
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Special Cases
- Equipment: L/720
- Vibration: L/1000
- Crane Support: L/800
- Hospital: L/480
- Laboratory: L/480
- Computer Floor: L/480
Analysis Methods
Key specifications for deflection calculation:
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Calculation Models
- Simple Beam: 5wL⁴/384EI
- Cantilever: PL³/3EI
- Fixed Ends: wL⁴/384EI
- Point Load: PL³/48EI
- Partial Load: Custom
- Combined: Superposition
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Analysis Factors
- Temperature: ±30°F
- Moisture: 12-19%
- Support Settlement: 1"
- Connection Slip: 1/16"
- End Fixity: 0-100%
- Load Eccentricity: e/d
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Design Criteria
- Serviceability: IBC
- Strength: LRFD/ASD
- Ductility: μ=3-6
- Fatigue: Category B
- Fire Rating: 1-3 hr
- Cost Index: 1.0-1.5