My soon to be constructed deck will have beams made from three 2x12s sandwiching ½" plywood, sitting on 6x6 posts. This gives both the beams and the posts a width of 5½ inches.
To ensure the beams stay put, I'd like to purchase 3/16" x 5" x 8" steel plates (SS 304 7ga). I would use 2 steel plates per post/beam connection (one on each side), plus (qty 4) SS 304 ½" hex bolts / washers / nuts.
Using these plates is vastly cheaper than the ready made solutions from Simpson and other companies, of which at least some number are also made with 7ga steel. Even increasing the steel plates to ¼" thick is still vastly less expensive than the ready made connectors.
Here's a diagram of the DIY connectors plus hex bolts:
.-------------, | | | O O | | | | | | | | | | | | O O | | | '-------------' Note: Perhaps but not necessarily to scale
What is the folly of this method? Is it dangerous? What makes the commercial product better than just purchasing steel plates and bolts?
Just wanted to add that this question may have been a bit misleading. The actual code approved connectors for this structure will be something more like these. The beam will be completely supported on top of the posts. This is a 12' x 20' ft deck. The premise was that the DIY plates seem significantly stronger than the code approved connectors. I made this unclear by originally linking to the 7 gauge Simpson connectors.