On Sun, 1 Nov 2020 07:29:08 +0000, Andy Burns wrote:

The board to board joins have the T&G profile and so don't need
extra
support.

Stagger the joins, but a 1/4" tongue of weetabix doesn't have much
strength,

True but the T&G on weetabix is more like an inch and half with quite
on offset between sides and the toungue/groove tapered.

--
Cheers
Dave.