TUNNEL REINFORCEMENT Carly Purcell, March 28, 2024April 20, 2024 CHALLENGE Corrosion of tunnel walls required new steel liner plates. Underground access was limited to only one side. SOLUTIONS BoxBolt was selected for their unique advantage: Dependable steel-to-steel reinforcement for one-side-only installations. SUCCESS FACTORS A customized, extra long BoxBolt was engineered to meet challenging wall density requirements 61,000 BoxBolts were installed to secure the tunnel structure THE ORIGINAL BOXBOLT® The BoxBolt is available in three finishes: Zinc plated for the less aggressive environments Hot Dip Galvanized for the more aggressive environments Stainless Steel for the most demanding of applications Materials: Mild steel to BS EN 10083 Grade 1.1151 Stainless steel to BS EN 10088 Grade 1.401 EXECUTION BOXBOLT® APPLICATION METHODS Fasteners