Hallwood Modular is your one-stop-shop for Blast Resistant Buildings - Sales | Rentals | Site Services Hallwood Modular has the safest, most flexible rental fleet of Blast Resistant Buildings. Its "lego block" type building system can accommodate most blast zones in footprints ranging from 12x20 modules to 20,000 sq. foot two-story mechanically fastened complexes. Strategically placing supervisor offices, break/meeting/lunch areas, restrooms, tool rooms, etc., near the work area can minimize TAR/construction days, making you more efficient and save you money. Its Site Services division handles everything from door maintenance/replacements, building installations, building refurbishments, building relocations, etc. Since the introduction of the modular blast-resistant building in 1999, Hallwood Modular has made significant investments in revolutionizing its rental fleet, enabling (TAR) turnaround projects to be more efficient.