Slabs have issues that need to be investigated as well, not all of  
them are poured as thick as others and just because it is on ground  
level does not mean that it has the ability to withstand a high load  
per square foot. Allot depends on the amount and type of rebar and  
the depth of the pour and type of concrete mix. Also some floors have  
things buried in them - like heating pipes and electrical pipes.  
Sometimes there can be an erosion of some of the soil under the floor  
which can lead to the floor becoming cantilevered without being  
designed that way - drainage can be an issue. Again - all good  
reasons to have an inspection by a knowledgeable person.

Jim Lindner

Email: [log in to unmask]

   Media Matters LLC.
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On Dec 21, 2006, at 1:37 PM, Tom Fine wrote:

> For what it's worth, when my parents moved into the house I grew up  
> in, a few years before I was born, they decided to consolidate  
> their very large collection of records and tapes -- at least those  
> not in my father's office at the studio. The basement was non-ideal  
> because it's too wet and too dark/dank for my mother in any case.  
> So they decided to put them all on a long wall, floor to ceiling,  
> in their shared office room. The contractor planned out the shelves  
> and then did weight estimates and promptly changed the plan so that  
> first of all, the shelves were on a structural wall and second that  
> there were new reinforcing columns added below. He did something  
> where the weight is centered on a foundation wall (stone and  
> morter) because the wall is where the original house meets a late  
> 1800's expansion (the office is the ground floor of the expansion).  
> The shelves have been chock full -- I mean full to the brim -- of  
> records and tapes since 1964 and no problems thus far. I'd estimate  
> the weight must be approaching a ton, spread down a 15' or 20'  
> length. The shelves are hardwood, I think.
> In my house, I have a similar shelf, but it's free-standing on the  
> carpeted concrete slab downstairs. I just stacked up a wall's worth  
> of those pine cubes you can find at AC Moore and other stores. AC  
> Moore has a coupon in our pennysaver each week, so all were bought  
> at 30 or 50 percent off sticker. There's another similar stack in  
> the furnace room for my extensive collection of audio books and  
> magazines.
> By the way, at 128K MP3, the entire wall at my parents' house could  
> fit in an 80-gig iPod, half a deck of cards. The quality would not  
> be anywhere near the original, though.
> -- Tom Fine
> ----- Original Message ----- From: "Roger and Allison Kulp"  
> <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, December 21, 2006 1:00 PM
> Subject: Re: [ARSCLIST] Floor Load Capacity
>> I never had to worry about that,as mine have always bee in a  
>> ground-level area, witha a concrete floor.I would not suggest  
>> anybody store a big collection any other way.
>>                                 Roger Kulp
>> Nicole Blain <[log in to unmask]> wrote: Hello all,
>> Does anyone know what the standards are for floor load capacity  
>> for stacks of 12" vinyl and 10" shellac discs.
>> The standard for library book stacks is ~150 pounds psf.  I tried  
>> and failed to find anything on the internet that specifies vinyl  
>> and/or shellac.  I imagine it would be higher for the latter. If  
>> there's an official document or study out there too, it would help  
>> convince the architects/engineers that this is an important issue.
>> I found an article in the Fall 1993 ARSC Journal: Storage of Sound  
>> Recordings by Richard Warren Jr.  He has weight per linear foot,  
>> but not floor load capacity.
>> Our collection houses ~175,000 12" vinyl and ~30,000 10" shellac  
>> discs.
>> Merci,
>> Nicole
>> Nicole Blain
>> Manager, Music Library/
>> Chef, Musicothèque
>> CBC/Radio-Canada
>> P.O. Box 500, Station A
>> Toronto, ON
>> Canada  M5W 1E6
>> Tel: 416.205.5901
>> Fax: 416.205.8574
>> [log in to unmask]
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