The term 'Modular construction' refers to the carefully controlled off-site factory production of engineered building sections or modules that are typically constructed to a 50 to 90% completion state in a manufacturing plant. They are then transported to the construction site for assembly into a three-dimensional structure where the interior and exterior is finished-out to complete the building process. The size of modular construction projects can range from a single module to multi-unit multi-story structures that are as sophisticated as site-built facilities.