Manuals for Armstrong Ceilings Surface Mount Tiles Model Document 1244 Instructions / Assembly , Warranty 2012 Warranty , Instructions / Assembly 2012BL Instructions / Assembly , Warranty 2012WH Warranty , Instructions / Assembly 231G Instructions / Assembly , Warranty 257 Full Product Manual , Product Brochure , Warranty 257A Warranty , Instructions / Assembly 258G Warranty , Instructions / Assembly 46B Instructions / Assembly , Warranty 741 Installation Guide , Warranty