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Profiled sheet metal building unit and method for making the same

  • US 4,962,622 A
  • Filed: 06/01/1989
  • Issued: 10/16/1990
  • Est. Priority Date: 06/01/1989
  • Status: Expired due to Fees
First Claim
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1. In a profiled building unit formed from sheet metal having a substantially uniform sheet thickness and presenting alternating crests and valleys, and sloped webs connecting adjacent ones of said crests and said valleys, the improvement comprising:

  • first and second stiffening ribs formed, respectively, in said crests and said valleys, said stiffening ribs extending longitudinally along substantially the entire length of said building unit and each having a substantially uniform rib thickness that is less than said uniform sheet thickness of said metal sheet.

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