45's in plywood seams?????

[seedubs1]

I see a lot of you guys "filleting" your 90 deg. plywood seams with resin. No doubt about it, it makes a strong, long lasting joint if you do it right.

Has anyone ever put 45's in all of their corners? You'd screw and glue your 3/4" ply together like normal, then screw and glue a 45 deg. trim strip to the inside seam.

I used to build a LOT of car audio boxes, and this is a practice often done for strength and for flow (90 deg. corners seem to "trap" sound waves, but that's irrelevant here).

It seems like the 45's would strengthen the seams just to begin with as soon as you screw and glue them in. It would also lessen the angle that you have to fiberglass over, which should further strengthen the joint.

Your thoughts???

 

[seedubs1]

If that didn't make sense, check out the pic below. I'm suggesting putting these 45's in all of the interior seams of a tank before fiberglassing the seams. I think it'd add some stability to the seams, and possibly make the tank a lot less leak-prone.

Anyone try this? What are your thoughts?

 

[wednesday13]

I think this is a great solution to a common problem .....nice idea. I dont so much like the gap behind the 45 but that can be adjusted or filled with glue id imagine. Even a triangle piece of wood would work too and solve the gap issue.

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[seedubs1]

I was planning on using a true 45, so the cross-section would be a triangle. So no gap. That was just an example to show the general concept. Couldn't find any better pics to illustrate it.

I can't really think of any downside. This should strengthen the joint considerably. Why have I not seen anyone do this yet?

 

[hardwood07]

its a great idea. the poured resin is stronger being as tho it brings it one step closer to being 1 solid piece. where as your described method is just adding a support piece to 2 already seperate existing surfaces. i myself have always poured the corners. but do it up man, if it works out for you, which i am sure it probably will lots of people will probably jump on the idea.

 

[coolkeith]

Nice idea. I've been thinking about having rounded inside corners for my future plywood builds, but a 45 might be easier.

 

[FinHunter101]

We did my 460gal Plywood Tank with 45* in all corner.. worked great for added structure to the tank.. We had xtra Resin Left over so we Poured the resin in the Gap Behind the 45* For the Hell of it the Corner are solid as a Rock..

 

[Shipwreck74]

Thats how I am building mine, I took a bunch of 2x2 boards and cut the diagonally then brad nailed them in place. I am in the process of finishing all of the corners now. It will make fiberglassing 10x's easier.