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Old 05-16-2019, 03:07 PM   #1
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Strengthening TREX with REBAR


Perhaps not the correct forum, but I'll take a shot.


I have a bench, about five feet in width, that consists of two curvy concrete end pieces held together by wood planks. Think bulky looking park bench. It has seen better days, and also needs to be relocated. Perfect excuse for rehab.


The current boards are all checked with some dry rot, so they need to be canned. I live on the water, and the environment is not friendly to wood, pressure treated or not. I'd like to replace the boards with TREX. The parts that butts would sit on consist of three approx 5' x 5" x 3/4."


Trex is of course not structural, so I'm thinking: what if I rabbeted a slot (or two) in each trex board on the underside and embedded some rebar, securing with construction adhesive.


Would that provide sufficient stiffness to support a couple of adults?
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Old 05-16-2019, 03:42 PM   #2
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Re: Strengthening TREX with REBAR


I see rebar rusting faster than PT wood rotting.
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Old 05-16-2019, 04:36 PM   #3
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Re: Strengthening TREX with REBAR


Epoxy coated rebar would work.
https://www.harrissupplysolutions.co...ted-rebar.html
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Old 05-16-2019, 06:02 PM   #4
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Re: Strengthening TREX with REBAR


Maybe I'm missing something here but what I'm visualizing is two concrete bench ends with 5' deck boards spanning between them to create a bench.

If that's the case there's nothing you can do with rebar to make trex span that.

You'd need some kind of a rigid frame to support the trex every 16".
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Old 05-16-2019, 06:51 PM   #5
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Re: Strengthening TREX with REBAR


I can't see rebar helping much. How about alum channel bar fastened to the under side of the seat boards.
https://www.metalsdepot.com/aluminum...m-channel-6061
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Old 05-16-2019, 06:59 PM   #6
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Re: Strengthening TREX with REBAR


I'm with Ron on this one. If you plan on sitting on it, a couple of pieces of rebar are not going to do it.
Maybe look at Ipe (eepay). It will turn grey in the sun, but last a heck of a long time.
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Old 05-16-2019, 07:13 PM   #7
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Re: Strengthening TREX with REBAR


Quote:
Originally Posted by Nealtw View Post

Thanks! I am going to create one piece with two channels, with two lengths of this stuff, and see what the deflection is.
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Old 05-16-2019, 07:14 PM   #8
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Re: Strengthening TREX with REBAR


Not a pro but any metal to provide support should be something like spring steel, think leaf springs. But even then the trex becomes just decoration.

Any way to fabricate a metal frame that arches up, over, and down? Something decorative like a fence maker could put together.

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Old 05-16-2019, 07:28 PM   #9
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Re: Strengthening TREX with REBAR


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Originally Posted by Bud9051 View Post
Not a pro but any metal to provide support should be something like spring steel, think leaf springs. But even then the trex becomes just decoration.

Any way to fabricate a metal frame that arches up, over, and down? Something decorative like a fence maker could put together.

Bud



Fabricators are hard to find for small one offs where I live. And what I have to work with (Concrete end pieces) is pretty mundane stuff, not really worth a bunch of time, effort and $. But I hear what you are saying about the materials. Perhaps I should visit the yard and see what they have. I'm definitely going to mock something up.
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Old 05-16-2019, 07:48 PM   #10
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Re: Strengthening TREX with REBAR


Here's a fence I drive by occasionally:
https://www.google.com/search?q=step...iw=952&bih=454

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