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Unread 03-23-2012, 05:27 PM   #1
Steve in PA
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A little engineering help/feedback would be greatly appreciated...

I'm looking at installing porcelain tile on this deck which has a few issues. I am wondering if what I plan to do would be ill advised or if this structure can handle the added weight.

First off the specs... 12x17 room... central beam supported by 2 posts 14 feet apart... the outside beam has 2 posts spaced 17 feet... joist are 2x8's, 6 foot span, spaced 16", 3/4" plywood subfloor. All posts are on concrete footings.

From the central beam to the outside wall there is an inch and a 1/4 drop over 6 feet.
I was planning on using 1/4" cement board on the first 6 feet and then a combination of dry-pack and leveling compound to get the floor flat.

My main concern is the outside wall as that will have most of the build up and I am thinking that 17' span between support posts is not structurally sound. Putting additional posts is not an option as it is a carport/garage entrance.

You can see in the picture that the aluminum is buckled and there already looks to be a sag along that 17' span ...

thanks ...!
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Unread 03-23-2012, 05:40 PM   #2
cx
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Think the first thing you'll need to is determine what you've got in there.

Might be easy enough to put some sort of engineered wood beam across there, or you might hafta go to a steel beam or some such.

I'd recommend you open it up first, though, or we'll all just be guessing.

My opinion; worth price charged.
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Unread 03-23-2012, 06:07 PM   #3
Steve in PA
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ahhh... I done left that out of the specs. I was told it's a flitch beam.
2- 2x8's and 3/4" ply samich.

CX... please move this to the other hangout as that is where I thought I was posting it. thanks.
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Unread 03-26-2012, 11:42 AM   #4
Steve in PA
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Thanks Bob.
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