L&T Construction is constructing India's first post office building using 3D printing technology in Bengaluru. It is the first public structure to be built in Karnataka aided by this innovative technology.

The project is to design and build the 1,000 sq. ft. Halasuru post office using 3D concrete printing technology within 45 days. The project scope involves structure, mechanical, electrical and plumbing (MEP), and finishes.

Work is progressing at a brisk pace. The 3D printing of the post office building is cast 'in situ' at the job site in an 'open to sky' environment, by deploying a fully automated 3D printer.

The technology has been approved by the Building Materials and Technology Promotion Council (BMTPC), and further, IIT Madras has approved the structural design. 3D concrete printing aids in a faster construction process and enhances the overall build quality.

Using a robotic printer, 3D printing technology deposits concrete layer-by-layer in accordance with the 3D model drawing input, while allowing flowability, quick hardening for load-bearing capacity, and sufficient strength to ensure successful printing.

L&T Construction has executed 3D printing technology for projects such as affordable housing up to G+3 floors, villas, military barracks, and single-floor schools. It is looking to expand its portfolio of 3D printed structures in various sectors.