So what does support the 13/16" thick floor boards? In a nutshell, floor joists. The joists are 2" thick by 1-3/4" wide. There's a stringer, fiberglassed into the hull, upon which the joists, running athwart, rest upon. The joists are fixed to the stringer by fiberglass. According to Tommy Chen, inside the stringer is a wood called 'Yako' which is very much like iron wood.
![floorjoists.jpg](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6L5hbWT_AZFjX9ZZCPjFwUTH2zIc-Xs5v50TP6e9cnHEQdmKsVwGCJRYenbnctVgNN5j35mAAdCMHvdl0d4sqrs2soC0o6yda-2Gko3fhyphenhyphenUZPIw83VdVKfJKAUy_kdg7H7V3CQmEy5mC5/s400/floorjoists.jpg)
Looking forward and outboard on the starboard side. The stainless water tank is forward.
![joist%252520to%252520stringer%252520tabbing.jpg](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijpUD_bgJi2wk21M8jeZxMYuWq1IuCNRjsBqeOIhXTuVklK4m_muHgDw42mIh-yv8k5jL3KfXAuA3CNgQpFUa7tPDx3RPBDLhAgXr86GLGTWLJkOtGQkqEehOkMhLVZAAMLadG8kq-rMkY/s400/joist%252520to%252520stringer%252520tabbing.jpg)
Looking outboard at the floor support structure. Starting at the bottom are: (1) turn of the bilge for the fiberglass hull; (2) a stringer fiberglassed to the hull; (3) a floor joist that has been fiberglassed to both the stringer and the hull; and (4) a fixed portion of the floor.