Abstract: A burglar bar apparatus and method of assembly, for safety and security, suitable for installation in apertures of buildings is disclosed. The burglar bar apparatus comprises a totally unwelded structure with primary components being a gate member having cross rods and lateral rods, mounts for attaching the gate member to the aperture, and a locking mechanism to secure the gate in the aperture. The method for assembling the burglar bar device consists of cutting appropriate lengths of rods into a grid gate that restricts the movement of the individual rods, mounting the grid gate in the aperture, and locking the grid gate for preventing unauthorized ingression or egression.