Here's a dining table I recently completed. It is 97"x54"x28". The top is elliptical. It should seat eight quite comfortably, and ten with a little squeezing. It is made of white oak.
diningtableoverview.jpg
diningtabledetail.jpg
The top has a plywood core veneered top and bottom with shopsawn veneer 1/8" thick. In the field, the top is 1" thick. Solid lumber edging makes the perimeter 1.6" thick. Here's a shot of the table top in the veneering bag. This is the bottom face; you can see knots I didn't want to include on the top face. I had to make a new big bag to fit this top. You can also see the table base in the background.
veneering.jpg
The base is made from beams 1.6"x4". I laid out the joinery in the middle so that the long beams run straight through the joint, to keep the beams as strong as I could. Here's a shot of the underside of the short beams, cut to sit firmly on the tops of the long beams.
jointdetail.jpg
Here's a shot of the table edge, taken from below.
table-edge.jpg