C.D. Smith Construction self-performed the concrete footings and foundation, steel and wood erection, rough and finished carpentry, and brick and stone masonry. Winona Heating and Ventilating's provided HVAC engineering and design services for a state-of-the-art HVAC system. Coupled with Multistack eco-friendly modular chillers and 450 rooftop solar panels, Fastenal's new office building is impressively sustainable and efficient.