Ronn W Posted June 10, 2016 Report Share Posted June 10, 2016 I am pretty sure that that wood is roof decking. It probably spanned 4 to 6 feet on a house that had the large rafters exposed on the inside. The roof probably had a very shallow slope like 2 or 3:12. The insulation would have been applied on top of the planking, then plywood with long and then shingles. It was the old "modern look". I don't remember when - 1960's or 70's. Here's an idea. If you have a jointer or are very good with a plane. Cut the single tongues off one side and joint that side. Leave the top and bottom tongues on the other side of each board, joint them and then glue it up. You will have a hollow in the table but you have wider boards and about 1 1/2" of glue surface that should be plenty strong. Bread board ends could cover the "holes" and the ends of the table. 1 Quote Link to comment Share on other sites More sharing options...
wdwerker Posted June 10, 2016 Report Share Posted June 10, 2016 Those thick double tongue boards were also used for structural floors in timber framed warehouses. The ones made of heart pine were incredibly strong. 1 Quote Link to comment Share on other sites More sharing options...
Tom King Posted June 10, 2016 Report Share Posted June 10, 2016 Machined like that, I expect Yellow Pine from the 1970's or early '80s, although it could have been used longer than that in laminated wood truss commercial buildings. Quote Link to comment Share on other sites More sharing options...
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