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Old 09-24-2009, 02:56 PM   #1
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Garage Attic 2x4's


Hi Folks, my first post here-
Thanks in advance for all thoughts-

The garage at my mom's is full of unused stuff that certain family members are attached to, and are unwilling and/or unable to part with. It's ridiculous. Anyway...I am considering putting all of it in the attic above the garage, however, after having a look up there i noticed that:

-the joists are 2x4s at 24" on center, over a span of about 20'
-they don't run the full 20', but rather about 12', that is joined to an 8' by a roughly 6' square metal grid looking thing, i don't know what it's called but y'all probably do.

i've walked around up there and haven't felt unsafe, but i don't know if it's reasonable (weight-bearing wise) to screw down subfloor grade plywood and then bring up load after load of crap from the garage for storage.
safe?
unsafe?
any thoughts?

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Old 09-24-2009, 03:40 PM   #2
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Garage Attic 2x4's


Do you have a picture?
Not sure what the grids thing could be
2x4's even at 12' span are over their limits for floor joists
From what I can see you would need close to a 2x8

What size are the roof rafters?
Just want to make sure these are not trusses

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Old 09-24-2009, 04:30 PM   #3
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Garage Attic 2x4's


i'll take a picture and post in a couple hours.
yeah, i'm short on vocabulary.

i think they are trusses.
i found an image that looks similar that was referred to as a fink truss, and the metal grid things look like they are gusset plates. that make sense? well, i'll post an image soon anyway. thanks.

i guess then joists just run straight with no triangular assembly...?
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Old 09-24-2009, 07:09 PM   #4
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Garage Attic 2x4's


Does this photo give the necessary info?
the total span is about 20', so there are two 2x4s running horizontally, one about 12' and the other about 8' meeting in a truss (i guess?) as shown, although the attached photo is not of where the 2x4s meet, where they meet is just like the one shown, just on the other side of the W.


[IMG]file:///Users/jonathanrizzo/Desktop/IMG_1168.JPG[/IMG]
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Old 09-24-2009, 07:25 PM   #5
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Garage Attic 2x4's


Those trusses probably aren't rated for any top loading.
You'd have to build a separate joist system to handle any signifigant weight.
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Old 09-24-2009, 07:33 PM   #6
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Garage Attic 2x4's


Basically...no..you cant store "stuff" in the trussed roof structure that wasn't designed to be storage.
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Old 09-24-2009, 07:37 PM   #7
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Garage Attic 2x4's


And the 12' open area is in the middle of the truss...even worse
Is there any wall at all under any of this?
You can't span 20' with small 2x's for storage
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Old 09-24-2009, 07:45 PM   #8
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Garage Attic 2x4's


Do what I did when I bought the old family home with 30 years of accumunilation from 6 kids.
Tell them they have so long to get their stuff out or it's going to the landfill!!

They came over pretty fast!
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Old 09-24-2009, 09:04 PM   #9
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Garage Attic 2x4's


yeah, you guys have confirmed the conclusion i've been forming.
i wish i could toss it all, it's complicated but i can't and the 'stuff' sits there unused and obstructs any useful activity (lawnmowing, tinkering, gardening, etc).

i guess it's a good thing i didn't buy the plywood, i had all the cuts measured out...
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Old 09-24-2009, 11:28 PM   #10
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Garage Attic 2x4's


i don't know what part of the country you are from but all these trusses are designed to handle snow load plus at least 4 layers of shingles plus a little over that. you are pretty safe in running 1 run of 5/8'' ply down the middle and putting some stuff up there as long as its not too extreme and you spread the weight out. one thing some don't take into account is when you place ply on top of this assembly and nail it or even better screw and glue it down you create a box beam that also distributes the weight
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Old 09-25-2009, 12:23 AM   #11
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Garage Attic 2x4's


If you add anything to engineered trusses other than the ceiling material load stated on the truss specs. from the manufacturer, you will void their warranty. If you ever had any problem with the trusses you would be liable, not them. You would be loading their struts and bottom chords over what they were rated for. Then with a heavy snow load, they could fail, and your insurance would not pay. This is why the struts and chords are sized materials- for the specific load. As well as the gusset plates and design. You think they would use larger steel plates than they need? Or a sturdier design, with more lumber?
Be safe, Gary
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Old 09-25-2009, 01:00 AM   #12
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Garage Attic 2x4's


Again, thanks.
Sounds like I could put a little bit up there, but it doesn't seem like it'll be enough to make it worth the effort and the potential consequences.
Much appreciated.
I look forward to returning with a question that builds toward a positive outcome and not a not-negative outcome.

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