From: psperson@old.netcom.invalid   
      
   On Sat, 06 Dec 2025 17:24:55 GMT, scott@slp53.sl.home (Scott Lurndal)   
   wrote:   
      
   >Paul S Person  writes:   
   >>On Fri, 05 Dec 2025 17:30:22 GMT, scott@slp53.sl.home (Scott Lurndal)   
   >>wrote:   
   >>   
   >   
   >>>If the shelving is wood, this handy-dandy tool will calculate the   
   >>>shelf-sag (0.02 or less should be the target) for a specified wood   
   >>>species and book load.   
   >>>   
   >>>https://woodbin.com/calcs/sagulator/   
   >>   
   >>And so it does ... if you happen to know what wood was used.   
   >>   
   >>Mine are mystery wood with a very nice veneer attached. One of the   
   >>particleboards, I suppose.   
   >   
   >I wouldn't consider that wood.   A fine shelf would use a void-free   
   >plywood and real wood veneer.   An Ikea shelf would use particle board   
   >and vinyl veneer.   The fine shelf would have greater resistance to sag   
   >than any hardwood of the same thickness[*].  The Ikea shelf would have   
   >a very small load capacity as particle board has no ability to resist   
   >sag.   
   >   
   >OSB will be somewhere between particle board and plywood in sag   
   >resistance.   
      
   My point was that I have no idea what the shelves are made of. The   
   look nice and, yes, they have the visible front ends covered.   
      
   Some of the closable boxes have sustained enough damage to show that   
   /they/, at least, are not wood that has a name attached. So did my   
   original TV/player cart. I'm not just rough on books.   
      
   Even if they were called "oak" in the advertising, that would refer to   
   the veneer, not necessarily the sides, back (if not cardboard), and   
   shelves.   
      
   Most of these were purchased from Sears or JC Penney. They had various   
   brand names. The last two were from Staples, and called "48" Royal Oak   
   Bookcase 3 Shelf". I ended up buying 1"x12"xheight-desired bits of   
   wood (Pine or Spruce, depending on when purchased) to brace the   
   shelves. Either the quality was less than the earlier ones or, in the   
   16 years between 1991 and 2007, my ability to successfully assemble   
   these things deteriorated.   
      
   >[*] Such a shelf often has a strip of real hardwood glued to the   
   >    visible front edge of the plywood, this is often thicker than   
   >    the plywood and will provide further sag resistance.   
   --    
   "Here lies the Tuscan poet Aretino,   
   Who evil spoke of everyone but God,   
   Giving as his excuse, 'I never knew him.'"   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)