Project Intent - Replace unusable cast iron fireplace dampener.
Process - Search out existing options and price. Non standard size due to age required fabrication. Calculate heat deformation rate of cast iron and apply to mild steel accomodating steel to meet those of iron. Steel needed to be 3/8" - 1/2" thick in order to perform better than the original. Found that the secondary venting on the original was not necessary on the lower level of the house so it was deleted from design. Used plasma cutter to create the flat material and drill press to create the fulcrum for the grate adjuster. Weld into place and seal edges with non combustable caulk.
Status - Complete and operational