Floorboarding new to old over plumbing and wiring

[GeorgeP]

Plumber and electrician have cut through joists and left our floorboards in a right 2 and 8. A joiner is in right now to sort the floorboards out. A builder who was in quoting today (this is a renovation project) said he would glue flat metal plates over the pipework/wires and then put floorboards on top to level up with existing. I asked the joiner about this and he said he is going to use a screw over 5" wide timber so that it doesn't move because using metal plates will mean it won't be flat. I am confused. Are both these methods correct? Btw, the floorboards are narrow - not more than 3" - from 1938 and either maple or pine. We were told they cannot be replaced like for like because their width means anyone treading on them over this new pipework will turn the floorboards in to the middle and they would collapse. Hope this makes sense. Very curious to know why 2 people come up with such different solutions......

 

[Burnerman]

If the joists have been notched to accept cables and pipes, its a pretty sound (but infrequently done) move to fix plates over the notch....this is to hopefully prevent any future nails or screws from penetrating whats beneath.
The plates should be recessed into the timber though, so the tops of the joists remain level.
John

 

[foxhole]

A few pic would help, plumbing should be thru the centre of boards and wiring thru holes in joists, should be little need for bridging if done correctly.

 

[Harbourwoodwork]

I have worked on job's where plumbers are not allowed to to touch woodwork for good reasons well known in the trade,electricians are not much of a problem as Fox has said they go through the joist centres if they start lying cables in old notched out pipe runs, it can cause problems.