Case Study: FRP Manhole Covers in Airport Runways

Airports demand infrastructure that can endure extreme conditions, and FRP manhole covers have proven their mettle in this high-stakes environment. A notable case study involves a major international airport that replaced traditional iron covers with FRP on its runways and taxiways. The primary challenge was load capacity—runway covers must support the weight of jumbo jets, often exceeding 400 tons. FRP covers, engineered with advanced composites, met these demands, achieving load ratings up to Class E (600 kN) while weighing 70% less than iron equivalents. This lightweight design reduced installation time and labor costs, critical during tight maintenance windows. Corrosion resistance was another key factor, as runways face constant exposure to jet fuel, de-icing chemicals, and weather extremes. Unlike iron, FRP maintained structural integrity without rusting, extending service life and minimizing disruptions. The airport also reported improved safety: FRP’s non-conductive properties eliminated risks from stray electrical currents near navigation systems. Over five years, maintenance costs dropped by 30%, and no replacements were needed, unlike the frequent repairs required for iron covers. This case underscores FRP’s role in modernizing aviation infrastructure, offering a durable, cost-effective solution tailored to the unique demands of airport operations.