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Our top of the line tradesmen and state of the art equipment. Web shawhan sheet metal has been fabricating and installing quality sheet metal products in the kansas city area since 2004. Web the mission of the icb is to direct and implement a comprehensive set of certification programs to assure sheet. The sheet metal and air conditioning contractors’ national association (smacna) is an international. Web certified sheet metal provides two locations to best serve your needs. Web about certification you may have heard of aisc quality management systems (qms) certification, but do you know what's.