CCRI Stair Tread Replacement Plans http://www.stillwaterconst.com/wp-content/uploads/2019/12/CCRI-Knight-Stair-Tread-Upgrades-Construction-Dwgs.pdf
CCRI Stair Tread Replacement Specs http://www.stillwaterconst.com/wp-content/uploads/2019/12/CCRI-Knight-Stair-Tread-Upgrades-Project-Manual.pdf