The ESCWA (Economic and Social Commission of West Asia, a UN body) headquarters in Beirut consists of 16 floors, with seven floors below ground. Smart building capabilities and heat mirror glass laminates, produce office areas of exceptional comfort.

The building envelope is composed of a unitized panel system, which has a double laminate interior in a double glazed assembly whose exterior is part glass and part granite. A 20 metre span steel truss bridge houses the chairman's office. The building has thin 30 cm concrete slabs with large (12 m) spans. This was achieved by using a post-tensioned system. The 52,000 square metre project was built on a fast track basis, and all the works were completed in 13 months. Such speed required ACC to work on a 24 hour/7 days a week program. Three shifts of workmen and two shifts of staff and engineers were required to maintain the pace of the client's tight schedule.