Welding shall comply with AWS D1.1, Structural Welding Code. CLEANING: Clean exposed surfaces of stair treads and risers. Use cleaners appropriate for precast concrete finishes and colors. Acid based cleaners may alter finish and color. SEALING: If precast concrete paving units are factory sealed, test for compatibility before applying additional sealer. Follow sealer manufacturer’s instructions for application and maintenance of the sealer. 3.7 COMPLETION: Protect precast concrete paving units from damage due to subsequent building operations. After installation and before completion, inspect precast concrete paving units for construction damage and obtain new precast concrete paving units if required. Immediately prior to final acceptance of project, clean precast concrete paving units. END OF SECTION
Welding shall comply with AWS D1.1, Structural Welding Code. CLEANING: Clean exposed surfaces of stair treads and risers. Use cleaners appropriate for precast concrete finishes and colors. Acid based cleaners may alter finish and color. SEALING: If precast concrete paving units are factory sealed, test for compatibility before applying additional sealer. Follow sealer manufacturer’s instructions for application and maintenance of the sealer. 3.7 COMPLETION: Protect precast concrete paving units from damage due to subsequent building operations. After installation and before completion, inspect precast concrete paving units for construction damage and obtain new precast concrete paving units if required. Immediately prior to final acceptance of project, clean precast concrete paving units. END OF SECTION
Stairtread-Spec-6-27-2016.docx