Each scintillator module consists of a row of 16 mechanically joined 10.8 cm wide scintillator strips placed side by side in a protective aluminum casing. The thickness of the case walls is 2 mm; this provides the necessary mechanical stability. Strips are fixed within the module by a 0.1 mm thick double-sided adhesive layer. The gap between two adjacent strips in a module is kept below 0.2 mm. The length of the modules varies from 2.3 m to 4.1 m, for three different widths: 0.97 m, 1.75 m and 1.81 m.
After assembly, modules and readout electronics are tested for proper operation. These tests verify the full readout chain, characterize the efficiency of cosmic muon detection in each module, and measure the data collection processing in each channel. After post-production acceptance tests at LHEP the modules are shipped to Fermilab.