On Sunday, 4 November 2018 15:09:21 UTC, George Miles wrote:
Making and Lining a 6 foot deep manhole pit:

There are tree roots in the main drain from the house,
the drain engineer suggested inserting a new access point
to clear the roots, and maybe insert a plastic liner.

I guess the hole needs to be about 6 feet deep,
and have a possible loan of a digger and driver.

But how big to make the hole,
and how to line it?
Blocks or concrete how thick?
or newfangled plastic ?

george

The easy way is to buy a sectional plastic one.
They often need to be surrounded with concrete.

Eg;-

https://www.drainagepipe.co.uk/produ...-chamber-sets/