• Barrier protection:
  One of the simplest ways to use concrete blocks for security is to create a physical barrier. Placing large concrete blocks or barriers at entry points or loading dock doors can prevent unauthorized access. The heavy weight of the blocks will make it difficult for someone to move them or break through them.
   

• Perimeter protection:
  By placing concrete blocks around the perimeter of the building, you can create a protective barrier that prevents vehicles or intruders from entering the premises. This is particularly useful for industrial sites that are in remote locations and have large, open areas around them.
   

• Deterrent:
  Simply having concrete blocks visible on the property can act as a deterrent to potential intruders. They serve as a visible reminder that the property is protected and that trespassers will face physical barriers if they attempt to enter.
   

• Temporary Barricades:
  If there are areas within the building that are off-limits, you can use concrete blocks to create temporary barricades. This is particularly useful if there is ongoing construction or maintenance work taking place in the building.
   

• Vehicle Protection:
  Concrete blocks can be used to protect vehicles parked on the premises. They can be placed around parking areas to prevent vehicles from being stolen or damaged.
   

Overall, the use of concrete blocks can help to enhance security in empty industrial buildings by creating physical barriers, acting as a deterrent, and protecting vehicles and property.