Basic Steel Information
- Modulus of elasticity, E = 210,000 N/mm²
- Shear modulus, G = E/[2(1 + ν)] N/mm², often taken as 81,000 N/mm²
- Poisson’s ratio, ν = 0.3
- Coefficient of thermal expansion, α = 12 x 10-6/°C (in the ambient temperature range).
Range of normal spans & associated depths
The following tables present the typical spans for different types of steel members. Engineers typically do not exceed 35 feet maximum spans for safe construction.
Table 1: Structural Depths
Tables 2. & 3. Beam Span Ratios and Span Options
Table 4. Structural Steel Span Ranges
Table 5. Roof Trusses & Span Weights
Table 6. Girder Analysis Tables
Table 7. Portable Deflection Tables
Steel Frames 