Types of redirect
Natural redirects
Natural redirects occur where a rope is passed over a branch or through a union to improve the subsequent climbing rope angle .
Natural redirects are quick to set and can be set ‘ remotely ’ without needing to climb to the redirect point .
Artificial redirects ( fixed , high friction )
Artificial redirects can be used where there is no suitable union at the chosen redirect site .
They are usually as simple as a sling and karabiner which is used to capture the climbing line or climbing lines .
Critical point test : Where the included angle at the redirect is under 120 ° or if the consequences of failure are unacceptable then two separate redirects should be installed for the main and belay lines .
Artificial redirects ( fixed , low friction )
Where the redirected rope is intended to be used for lifting , a pulley or block must be installed at the redirect . The example on the left shows a double pulley being used to redirect both the main and belay lines in a twin tension rope system .
Critical point test : Where the included angle at the redirect is under 120 ° or if the consequences of failure are unacceptable then two separate redirects should be installed for the main and belay lines .
Many other redirect types are possible , however it is not expected that they will be required for tree rescue and will not be discussed in this manual .
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