Since 2001, Richardson Safety Trolleys (RSTs) have redefined ziplining safety. Originating from a record-breaking zipline in Park City, Utah, our trolleys boast a flawless track record across fifty ski resort ziplines. Our latest RST-23 (mini) provides lightweight, one-setting speed control for zipliners, ensuring safety on various terrains.The RST's versatile pin/slope settings offer adjustable brake force for different weights and terrains. With over a dozen lever arm adjustments, zipliners of all sizes can experience a safe and controlled descent. The slope-adjusting speed control ensures consistent speeds for all zipliners.Introduced in 2019, our telescoping spring patents mitigate braking-related issues, meeting safety standards and reducing the risk of lawsuits. Easily installable and offers a solution to common ziplining challenges, making Richardson Safety Trolleys a reliable choice for a secure ziplining experience.

Zipline standards mandate a minimum 3:1 engineering factor of safety (FoS), guiding engineers to address intended loads or safety levels. Confusion arises as standards require a 3:1 FoS but advocate for a primary and secondary brake, resulting in 2:1 compliance. This discrepancy contributes to high zipline accident rates, emphasizing the need for three brakes.In 2002, Park City Mountain Resort (PCMR) set the zipline standard with RST-02, incorporating two brakes and a fail-safe-safe (3:1) sixty-foot compression spring array. PCMR remains accident-free after twenty-one years, showcasing the reliability of RST systems.Contrary to common belief, gravity alone does not ensure braking reliability on ziplines. Ziplines lack expansion joints like steel bridges, leading to challenges with cable expansion, contraction, and changing weights. Freewheeling trolleys exacerbate speed control difficulties, posing risks for heavier participants. My zipline expert witness engagements thrive due to issues with two-wheeled trolleys, including retrievals impacted by temperature changes.