11.1. An effective communication plan shall be established prior to beginning work and shall remain effective for all the time that work is actively
taking place.
11.Communication Plan
11.2. Electronic communication systems should be utilized.
11.2.1. These communication systems shall be compatible with the work environment.
11.3. Hand or whistle signals shall be reviewed prior to beginning work to ensure understanding by all members of the work team.
12.1. Anchorage Systems
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.
12.1.2. A minimum of two anchorage systems shall be used to establish the main and backup systems.
12.1.2.1. One anchorage may be used to establish multiple anchorage systems.
12.1.2.2. Main and backup systems should utilize independent anchorage systems.
12.1.3. Anchorage systems shall accommodate the range of direction of pull.
12.1.4. Anchorage systems shall be protected appropriately.
12.1.5 . Load-sharing Anchorage Systems
12.1.5.1.. Load-sharing Anchorage Systems
12.1.5.1.1. Utilize multiple anchorages to achieve the required anchorage system strength.
12.1.5.1.2. Achieve a desired direction of pull or fall line.
12.1.5.2. Load-sharing anchorage systems should distribute forces appropriately between the anchorages.
12.1.5.3. A table of loads applied to anchorage systems where the forces are distributed equally based on the interior angle is provide din Table 1.
12.1.6. Directional Anchorage Systems
12.1.6.1. The minimum strength of a directional anchorage system is determined by:
12.1.6.1.1. The interior angle created by the rope passing through the directional anchorage system.
12.1.6.1.2. The anticipated load.
12.1.6.2. A table of loads applied to a directional anchorage system based on the interior angle is provided in Table 2.
12.2. Two-Rope Systems
12.2.1. Two-rope systems should be installed in a manner that minimizes lateral movement along sharp and/or abrasive surfaces.