David Wrote in message:
Following advice I am mounting (or trying to) single 13 amp sockets with a
flip lid into the floorboards.

I ordered Appleby dry lining boxes from Screwfix.

https://www.screwfix.com/p/appleby-1-gang-47mm-dry-lining-box/83270

After a major struggle I managed to get the Cat5e faceplate into the first
box, and worked out that the screw holes were not quite lining up because
of the method of fixing into the hole.

The yellow tabs fold into the inside of the box, then fold out through the
wall after you have inserted the back box through the hole.

I'm sure that I have used these successfully in plasterboard before.

The problem that I am seeing is that the yellow tabs don't quite fold into
a vertical position - they toe in slightly - so whilst I can get the first
screw in by offsetting the face plate a bit I can't get the second screw
to take because the metal thread in the yellow tab is not quite vertical.

This is not helped by having to wrestle the sprung lid of the socket to
get at the screw heads. Any raddling of the fitting lifts the plastic box
and moves the orange tabs back down and at a far greater angle from
vertical.

Has anyone found a smart way of doing this, or can recommend another brand
of dry lining box which doesn't have this "fold out clip" arrangement?

TIA




Dave R


Have you considered using ordinary metal back boxes & drilling
holes in their sides to allow you to screw them to the edges of
the floorboard hole?
--
Jim K


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