"Srgnt Billko" wrote:
No

"effi" wrote in message
...
oak tree limb about 8 inches in diameter has a section of swingset
chain inside it now, bark grew over chain and chain cannot be pulled
loose now

will chain posion tree?



The limb will fail long before it hurts the tree. Just cut off as much
is practical without digging into the bark. I've had wire fence grow
into the side of the trunk on silver maples and they still are fine.

If you see the limb dying, just cut it off.