I am relatively new to woodworking and have been lurking here learning a
lot. I am planning to build a large, informal dining table to accomodate
the entire family. It will be about 10 feet long and 38 to 40 inches wide. I
plan to adapt a trestle base from an existing plan that I have. The top
will be based on a table a relative of mine uses which he told me was made
from heart pine flooring. I have gotten recycled heart pint flooring. Like
most flooring it is much shorter than 10 feet. What I pan to do is start
with a plywood under layer and then attached the pine flooring to it and
this will fomr the table top. This results in three questions, how do I join
two pieces of plywood to get the 10foot lenght, how do I attached the
flooring to allow for wood movement and should I use some type of hard
finish on the plywood to seal it from any spills that may make their way
thru the top?

Appreciate any help I can get and will probably be back with more questions
as this progresses.

Russ