Architecture, Building and Structure Design Istanbul Equestrian Equine Design by Equine Design Studio IIEC is an equestrian facility designed for horses and riders. The complex includes stables, an indoor arena of 35 by 70 meters and an outdoor arena of 50 by 80 meters, all arranged to international equestrian sport standards. The structure uses a steel frame, a mechanical stone cladding facade, a wooden ceiling and metal roofing. Operable glass roofs provide natural ventilation and daylight, and the sand surfaces are served by a watering system. The compact layout lowers energy use and management costs and improves access for horses and riders.