| Steel | About 7,850 kg/m³ | High | Moderate to high when hot-dip galvanized, coated, or properly painted | Approximately 25–50 years, depending on coating, climate, and inspection | Periodic inspection for coating damage, rust, fasteners, and base connections | Roadways, parking areas, sports facilities, industrial sites, and high-mast lighting | High strength, excellent stiffness, broad size range, and good resistance to impact | Heavy; exposed or damaged coatings can allow corrosion | Low to medium |
| Aluminum | About 2,700 kg/m³ | Low | High in many outdoor environments because of its protective oxide layer; special care may be needed in marine or galvanically active locations | Approximately 30–50 years with suitable design and maintenance | Routine cleaning and inspection; check joints and dissimilar-metal connections | Streets, walkways, residential developments, parking lots, and coastal installations | Lightweight, corrosion resistant, easy to transport, and generally recyclable | Lower stiffness than steel and more susceptible to denting or deformation from severe impact | Medium |
| Fiberglass | Typically about 1,500–2,000 kg/m³ | Low to medium | Very high; does not rust and performs well in many corrosive environments | Approximately 25–40 years, depending on ultraviolet exposure, resin quality, and loading | Inspect for surface weathering, cracks, delamination, hardware condition, and foundation movement | Coastal areas, parks, pathways, utility corridors, and locations requiring electrical insulation | Nonconductive, corrosion resistant, lightweight, and suitable for harsh chemical or marine conditions | Can be vulnerable to ultraviolet degradation, impact damage, and localized delamination | Medium to high |
| Concrete | Approximately 2,200–2,500 kg/m³ | Very high | Generally good, but moisture, chloride exposure, freeze-thaw cycles, and reinforcement corrosion can cause deterioration | Approximately 40–75 years with suitable design, materials, and environmental protection | Inspect for cracking, spalling, exposed reinforcement, water infiltration, and foundation settlement | Highways, bridges, public infrastructure, utility corridors, and permanent installations | Excellent mass, stiffness, fire resistance, durability, and resistance to vehicle impact | Very heavy, difficult to transport or relocate, and potentially vulnerable to cracking or spalling | Medium to high |