67f87762   
   From: one-if-by-land@concord.com   
      
   "kthr33"  wrote in message   
   news:b18a6fce-d2ae-420e-8d24-97f41a565ebc@q27g2000prf.googlegroups.com...   
   > Our manufacturing facility is in an old tile manufacturing facility,   
   > originally built around the 1890's. The entire property is riddled   
   > with brick lined tunnels. We are interested in adding a free standing   
   > 50' x 100' x 16' eaves metal building. Current building design calls   
   > for concrete column footings of 3' x 3' x 3'. This would require a   
   > caving in and compacting procedure that would be quite expensive. Does   
   > any one know if such a building has ever been built entirely above   
   > ground? All ideas, comments, and suggestions will be greatly   
   > appreciated. Thanks, K.   
      
   You can alter the *bay* spacing so as to *miss* the tunnels.   
   Also, those footings seem small for rigid columns of that size, especially   
   considering the wind load.   
   In your area I suspect windbents would be required at each column and thus   
   even larger footings.   
   Another option is to pound or jet 14" concrete pilings with poured in place   
   concrete caps.   
      
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