A vertical lifeline assembly (VLA) is something you would commonly find in your fall protection bucket kit. The VLA is made up of a high-strength poly-rope with self-locking snap hook and a rope grab positioning device for you to use as your connector.
When you use any fall protection equipment, you must consider the limitations of the devices you are trusting your life to before you get to work. Free fall, fall clearance, and swing falls are all important factors to be aware of.
Free Fall: According to ANSI Z359.1, when using a VLA in conjunction with a personal fall arrest system, the free fall distance must be limited to 6’. When you use the vertical lifeline assembly in fall restraint, the requirement is that no fall will be encountered so there is absolutely no free fall distance allowed.
Fall Clearance: It is incredibly important that fall clearance is calculated properly. When using the vertical lifeline system in fall arrest scenarios, there must be enough room below the worker to successfully arrest the fall before they hit the ground or lower surface. A competent person should perform a hazard assessment to calculate the fall clearance before any work at heights is started.
Swing Falls: One of the most lethal and overlooked hazards in fall protection. A swing fall happened when the anchorage point is not directly above the worker and is instead off to the side. This creates an angle that can mislead fall clearance calculations and cause the worker to impact the ground or another structure if a call occurs. Swing falls will significantly increase the clearance required to arrest a fall.
OSHA has strict guidelines to keep in mind when using a vertical lifeline assembly. Here are a few to be aware of that directly correlate to VLA’s and their use in the workplace.
According to OSHA 1910.140(c)(3), “when vertical lifelines are used, each employee must be attached to a separate lifeline.” This differs from horizontal lifelines where you can have multiple workers tied off to one system.
As is the standard for many fall protection precautions, anchors, and lifelines; per OSHA 1910.140(c)(4); “lanyards and vertical lifelines must have a minimum breaking strength of 5,000 pounds (22.2 kN).”
DO NOT tie knots in rope lifelines. Knots in rope significantly reduce the rope’s strength and integrity. The only knots that are permitted are limiter knots at the end of the system to limit the distance of that the rope grab can travel. As stated in OSHA 1910.140(c)(6); “a competent person or qualified person must inspect each knot in a lanyard or vertical lifeline to ensure that it meets the requirements of paragraphs (c)(4) and (5) of this section before any employee uses the lanyard or lifeline.”
Malta Dynamics uses a high strength poly-rope to ensure our products exceed the OSHA standard1910.140(c)(15) which mandates that “lifelines must not be made of natural fiber rope. Polypropylene rope must contain an ultraviolet (UV) light inhibitor.”
These standards, among many other safety requirements will help you to make sure you are using your fall protection equipment safely and correctly. Do not overlook the importance of reading the manuals and following the proper protocols, your life is precious.
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