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Safe Practices for rope acces work > 12. Rope Access Systems > Flashcards

12. Rope Access Systems Flashcards

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12.1. Anchorage Systems

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12.1.1. Anchorage systems used as the primary support within a main or backup system shall have a minimum strength of either 12 kN (2700 lbf), or two times the maximum arrest force of the backup system when used in accordance with manufacturer specifications, whichever is greater.

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12.1.2. A minimum of two anchorage systems shall be used to establish the main and backup systems.

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12.1.2.1. One anchorage may be used to establish multiple anchorage systems.

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12.1.2.2. Main and backup systems should utilize independent anchorage systems.

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12.1.3. Anchorage systems shall accommodate the range of direction of pull.

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12.1.4. Anchorage systems shall be protected appropriately.

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12.1.5. Load-sharing Anchorage Systems

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12.1.5.1. Load-sharing anchorage systems may be used to:

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12.1.5.1.1. Utilize multiple anchorages to achieve the required anchorage system strength.

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12.1.5.1.2. Achieve a desired direction of pull or fall line.

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12
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12.1.5.2. Load-sharing anchorage systems should distribute forces appropriately between the anchorages.

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13
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12.1.5.2. Load-sharing anchorage systems should distribute forces appropriately between the anchorages.

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12.1.5.3. A table of loads applied to anchorage systems where the forces are distributed equally based on the interior angle is provided in Table 1.

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15
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12.1.6. Directional Anchorage Systems

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12.1.6.1. The minimum strength of a directional anchorage system is determined by:

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17
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12.6.1.1. The interior angle created by the rope passing through eh directional anchorage system.

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12.1.6.1.2. The anticipated load.

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12.1.6.2. A table of loads applied to a directional anchorage system based on the interior angle is provide in Table 2.

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12.2. Two-Rope Systems

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12.2.1. Two-rope systems should be installed in a manner that minimizes lateral movement along sharp and/or abrasive surfaces.

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12.2.2. Two-rope system shall be installed in a manner that if a component of one system were to fail, there would be minimum pendulum swing.

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12.2.3. Rope and/or edge protection shall be used when appropriate.

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12.2.3.1. Consideration should be given to protect each rope individually from any potential damage.

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12.3. Backup Systems

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12.3.2. Backup systems shall be designed and implemented to:

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  1. 3.2.1. Minimize free fall distance and clearance requirements.
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12.3.2.1.1. Free fall distance refers to the distance fallen before the engagement of the backup system.

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12.3.2.1.2. Clearance requirements are determined form the total fall distance including freefall, deceleration distance of the backup system, rope stretch, and harness stretch.

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12.3.2.2. Limit the arrest force on the user.

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12.3.2.2.1. Both maximum and average arrest force should be considered.

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12.3.3. Backup systems shall be separately fixed to an appropriate harness attachment point.

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12.3.4. The backup system may be attached to the same harness attachment point as the main system.

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12.3.5. Fixed backup systems shall be attached to anchorages meeting the requirements of Section 12.1.

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12.4. Dual Main Systems

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12.4.1. Utilizing dual main systems, where two systems are used to share the load, is an acceptable technique when the anchorage systems for each main system are separated horizontally by no more than 1 m (3.2ft), and the interior angle from the load to the anchorage systems in less than 90 degrees.

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12.4.2. Dual main systems are typically used in:

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12.4.2.1. Aid climbing.

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12.4.2.2. Interchanging the ropes within a two-rope system as main and backup systems.

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12.4.2.3. Long descents.

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12.4.2.4. Long lowering or raising applications.

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12.4.3. If a single piece of equipment is used to support the load in this scenario, a backup system shall be incorporated within the two-rope system.

Safe Practices for rope acces work (17 decks)

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