Cracked Branch Hanging In The Tree

What's happening?

A hanging branch — a hanger, in tree work terms — is a limb that has failed but has been caught by other branches on the way down. It is the single most dangerous thing a domestic tree can present, because all of the failure has already happened and only friction is holding it. Wind, rain loading, birds or the tree flexing will release it, and nobody gets a warning. Two shapes are common: a clean tear at a weak fork, usually a tight union where two stems have grown against each other, and a partial break along the limb where the wood has hinged but not separated. Both are held by fibres or by the branches beneath, and neither settles into a safe position over time.

What usually causes it?

• A tight, included-bark fork tearing under wind load, which is the classic weak union in a garden tree
• Storm loading on an over-extended limb that had grown out beyond what the union could carry
• Decay at the branch attachment, so the limb failed at the collar rather than along its length
• Snow or ice loading bending and splitting a limb, particularly on evergreens
• Summer branch drop, where a heavy limb fails in still, hot weather with no obvious trigger
• Previous topping or bad pruning cuts leaving weakly attached regrowth on old wounds
• A limb damaged earlier — by a vehicle, another falling branch or lopping — that has finally given way

When should you call a tree surgeon?

Now, today. This is one of the faults that should not wait for a convenient slot or for three quotes, and it should not wait for the next storm. Say clearly on the phone that a limb is hanging and what is underneath it, because that changes how the job is scheduled and equipped. Use a contractor who is insured and competent for aerial work at height — dismantling a hanger is a rigging operation, not a pruning one.

What will the tree surgeon actually do?

• Assess the tree from the ground, establish the fall zone and set up an exclusion area before anything is touched
• Decide between a climbing operation and a mobile elevating work platform based on the load and the access
• Rig and lower the hanging limb under control rather than letting it drop, using ropes and a lowering device
• Cut back the failed union to sound wood and make a proper reduction cut, not a stub
• Inspect the rest of the crown for further weak forks, cracks and other hangers while they are up there
• Clear, chip and remove the material, and advise whether the tree needs further reduction or is now stable

What to do before the tree surgeon arrives

A hanging limb has already failed, so the only thing left to manage is where people are when it lands. Everything below is about keeping the fall zone empty, not about making the branch safe.

1. Keep everyone out of the whole area the limb could reach, not just the ground directly beneath it — a released hanger swings and bounces.
2. Move cars, bins, garden furniture and anything else out of that zone, and keep pets and children indoors.
3. Shut and, where you can, lock any gate leading into the area so nobody wanders under it.
4. Do not climb, prop, cut, pull or rope anything, and do not use a ladder or a pole saw to test whether the limb is loose.
5. Photograph it from a safe distance and from two angles, and note its height and rough diameter at the break.
6. If the limb overhangs a road, footway or public path, report it to the council or highway authority as well as booking the work.