Concrete structures need to be strengthened for any of the following reasons:

• Load increases due to higher live loads, increased wheel loads, installations of heavy machinery, or vibrations.
• Damage to structural parts due to aging of construction materials or fire damage, corrosion of the steel reinforcement, and/or impact of vehicles.
• Improvements in suitability for use due to limitation of deflections, reduction of stress in steel reinforcement and/or reduction of crack widths.
• Modification of structural system due to the elimination of walls/columns and/or openings cut through slabs
• Errors in planning or construction due to insufficient design dimensions and/or insufficient reinforcing steel.