 NEW YORK--BUSINESS WIRE--SG Blocks, Inc. NASDAQ: SGBX SG Blocks or the Company, a leading designer, innovator and fabricator of container-based structures, announced today the execution of a significant purchase order from an existing privately held client completing a governmental project in Tyndall, Florida. The project consists of 20,560 square feet and is expected to be completed in the second quarter of 2021. This modular unit adds to the comprehensive portfolio that SG Blocks po 