Furring of Masonry Walls

6. Most larger buildings require dedicated chases or shafts for major vertical runs of mechanical and electrical distribution lines. These must be located and sized through extensive consultation with the professionals who design each system. A vertical electrical shaft generally adjoins an electrical closet at each lloor where transitions arc made to horizontal lines of distribution. A vertical shaft for ductwork sometimes connects to a fan room at each story, but more often it connects directlv to

the horizontal runs of ductwork at the ceiling or lloor. If a ductwork shaft is hemmed in by stair towers, elevator

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