Lectrus generator and gas engine enclosures feature a robust, drop-over wall-ceiling system. These walk-in NEMA 3R enclosures feature a welded and bolted construction, with all fabricated steel parts conforming to ASTM A569, Grade C-1018, and all structural steel conforming to ASTM A36. The walls, roof, and doors are lined with soundproof insulation and the galvanized liner is secured with heavy-duty screws.