When selecting passive rockfall protection nets, you’ll frequently encounter model names like RX-075 or RXI-200. What do the numbers “075” and “200” behind these codes represent? How do they influence your selection? This article decodes the crucial parameter of “Protection Energy Level.”
- What the Energy Rating Numbers Mean
RX-075: Indicates the system’s nominal protection energy level is 75 kilojoules.
RXI-200: Signifies the system’s nominal protection energy level is 200 kilojoules.
A higher number means the system can intercept larger rocks, faster-moving rocks, or rocks falling from greater heights.
- How to Select the Right Energy Level for Your ProjectChoosing an energy level isn’t a guessing game—it should be based on professional rockfall trajectory analysis or risk assessment. A simplified decision-making process typically considers these two key factors:
Rock Volume (single block): Estimate the size and weight of the largest potential falling rock.
Fall Height: The vertical height from which rocks could fall from the slope crest.
Quick Reference Chart:
Typical Energy Level (kJ) Approximate Interceptable Rock Volume (assuming 25-30m fall height) Suitable Applications 50-100 Approx. 0.2 – 0.5 m³ Low-height slopes, small debris protection 150-250 Approx. 0.8 – 1.5 m³ Most mountain roads, general railway lines 500-800 Approx. 2.5 – 4.0 m³ High steep slopes, large boulders, critical infrastructure 1000+ Above 5.0 m³ Extreme environments, e.g., near mines, hydropower plants - The Difference Between RX and RXI Series
RX Series: Standard passive protection systems, cost-effective and practical for most conventional protection needs.
RXI Series: Typically represent higher-performance ring net systems with optimized structures. They may be lighter for the same energy level or offer more stable performance at higher energy levels.
