Tri-Star Containment Pad Steel Buildings can be installed around the wall of our Tri-Star Containment Pad Spill Containment Systems. Steel Anchors (CST-SB-ANKR) are used to clamp the building to the side wall of the Tri-Star Containment Pad Spill Containment System creating a fully enclosed surface-mounted Spill Containment System. Tri-Star Steel Buildings are sold on a linear foot basis based off of the desired width of the Tri-Star Containment Pad Spill Containment System. Installation is not included in the price. Optional items for Steel Building sold separately: Roll-Up Door (CST-SB-RUPD), Man Door (CST-SB-MDR), Skylight (CST-SB-SKYL), and Window (CST-SB-WIN).