A monitor, which may be closely associated with a handrail, may determine the amount of force applied to the handrail. In general, the number of items in the list may be much greater than the device can display at once. The fences are adapted to deposit windblown particles in highly concentrated drifts disposed upwind andor downwind of the fence with relatively few particles deposited in the gap. The torque member is mainly composed of a resin material, for example, polyacetal, whereas the tether rotation support is mainly composed of a thermoplastic elastomer.