8.4	Planning Structured Cabling: Selection Practice
	8.4.1	Building description
The building in which you will install the LAN will provide work stations for 71 workers, and will include seven printers. The description of the building is as follows: The building occupies 669.8 m^2 of office space, all on a single floor. The building is 18.3 m wide x 36.6 m long. The ceiling height in all rooms, unless otherwise specified, is 3.7 m. All ceilings are dropped ceilings, unless otherwise specified. All floors are poured concrete covered with industrial carpet, unless otherwise specified. All heating and cooling in the building is supplied by a forced air system.. Potential locations for wiring closets have already been identified. They are marked on the floor plan as A, B, C, D, E, F, G, H, I, and J. The markings on the floor plan are as follows: The telephone company point of presence is labeled POP Men's' restrooms are labeled MR Ladies' restrooms are labeled LR Red dotted lines represent water pipes running through the ceiling space, from the water heater to the restrooms. Blue dotted lines indicate the locations of existing florescent lighting. Green dotted lines indicate the locations of existing high voltage power lines that run throughout the walls. Magenta dotted lines indicate the locations of existing heating and cooling ducts.

8.4	Planning Structured Cabling: Selection Practice
	8.4.2	Closet A
Location A is a small closet approximately .9 m wide x 2.4 m deep. It has a dropped ceiling with florescent lighting. The switch that turns the light on and off is located just inside the closet door. The floor is carpeted and the walls are of concrete block construction. There is only one electrical outlet in the closet. It is located on the back wall. Currently the room is used to store office supplies. Although a heating and cooling duct passes through the dropped ceiling space over the room, there is no vent into the room. The nearest thermostat for this section of the building is located in Room 113. The door swings outward when it opens, and is approximately .9 m wide. However, because all of the staff members must be able to access the storage area, there is no lock on the door.

8.4	Planning Structured Cabling: Selection Practice
	8.4.3	Closet B
Location B is slightly larger than location A. Its dimensions measure approximately 1.8 m wide x 1.5 m deep. Like location A, location B has a dropped ceiling. The floor is covered with ceramic tile. The walls are of concrete block construction covered by asbestos, which has been painted with a fire-retardant paint. There are no electrical outlets in the room. Lighting is provided by an incandescent fixture located in the ceiling; however, the switch that turns the light on and off is located on the wall across the corridor. There is no heating or cooling duct in the dropped ceiling space of this room, nor is there a heating or cooling duct into the room. The nearest thermostat for this section of the building is located on an inside wall along the corridor. Currently, the room is used to store toxic cleaning supplies. The door swings outward when it is opened, and is approximately .9 m wide. Because it contains toxic materials, there is a lock on the door. The door can be unlocked from either inside, or outside, the room.

8.4	Planning Structured Cabling: Selection Practice
	8.4.4	Closet C
Centrally located in the building, potential wiring closet C is larger than either A or B. Its dimensions measure approximately 2.4 m wide x 2.4 m deep. There are five electrical outlets in the room. There are two along each side wall. One outlet is along the back wall. The floor is carpeted. Lighting is provided by a large florescent light fixture centered in the ceiling. Immediately outside the room, in the corridor, are two additional large florescent lighting fixtures. The switch that turns all three fixtures on and off is located on the wall just outside room C. There is no heating or cooling duct in the dropped ceiling space of this room, nor is there a heating or cooling duct into the room. The nearest thermostat for this section of the building is located in Room 120. The walls are concrete block construction covered with asbestos. Although the room has a lock, it can only be unlocked from the outside. Currently, the room serves as the mail room for the building.

8.4	Planning Structured Cabling: Selection Practice
	8.4.5	Closet D
Also centrally located, room D is slightly larger than room C. Its dimensions are approximately 2.4 m wide x 3 m deep. In addition, room D is near the POP. The room does not have a dropped ceiling. A heating and cooling duct that passes through the top of the room is also vented into the room. Temperatures inside the room are controlled by a thermostat that is located just inside the door. The exit door swings outward, and is .91 m wide. The floor is covered with ceramic tiles. Lighting is provided by an incandescent lighting fixture in the ceiling. The light switch that turns the light on and off is located just outside the door. There are eight electrical outlets in the room, two along each wall. The walls are of concrete block construction and are painted with a fire-retardant paint. Currently, the room is used to store extra office equipment, and is kept locked. The door can only be unlocked from outside the room.

8.4	Planning Structured Cabling: Selection Practice
	8.4.6	Closet E
Also centrally located in the building, room E is adjacent to the POP. Room E is smaller than room D. Its dimensions are approximately 2.4 m wide x 1.5 m deep. A water pipe enters the building through room E, and travels from there to other locations throughout the building. There is also a hot water heater in room E. In spite of repeated attempts to remedy the problem, the water pipes in room E are heavily corroded. There is no false ceiling in the room. The floor is covered with ceramic tile. A heating and cooling duct that passes through the top of the room is also vented into the room. The nearest thermostat is located in the corridor outside the room. Lighting is provided by an overhead incandescent light suspended from the ceiling. The switch that turns the light fixture on and off is located just inside the door to room E. The door, which is approximately .9 m wide, swings into the room when it is opened. There are two electrical outlets in the room. They are located on opposite walls. Because of its contents, room E is kept locked, and can be unlocked from either inside or outside the room.

8.4	Planning Structured Cabling: Selection Practice
	8.4.7	Closet F
Room F is centrally located near the front of the building, next to the main entry, and behind the receptionist's desk. Currently it is used as a cloak room. There are two doors into the room. Each door is approximately .9 m wide, and each swings out when opened. Neither door has a lock. Lighting is provided by an incandescent light fixture. There are two light switches that turn the overhead light on and off. They are located just inside each door. There are no heating or cooling vents into the room. The nearest thermostat is located along the corridor wall outside Room 118. The floor is carpeted. The room has one electrical outlet. It is located along the wall behind the receptionist's desk in the lobby. Also, Room F has high voltage power lines running through its outside walls.

8.4	Planning Structured Cabling: Selection Practice
	8.4.8	Closet G
Room G is relatively small. Its dimensions are approximately 1.8 m wide x .9 m deep. The outside wall for room G is only a partial wall. It does not reach all the way to the 3.7 m high dropped ceiling. It only extends from the floor, and is of drywall construction. The two back walls do extend all the way to the dropped ceiling and are of concrete block construction. One electrical outlet is located along the longer of the two back walls. Room G does not possess its own lighting fixture. Lighting is provided by florescent lighting fixtures in the corridor, and in a shared work space. There is no door into room G, however, the entryway is .9 m wide. The floor is carpeted. There are no air vents from the heating and cooling duct into room G. The nearest vent is located approximately 4.6 m away. The nearest thermostat is located on the wall opposite the entry into room G. Currently, the space provided by room G houses the water cooler, a small microwave, and a small refrigerator.

8.4	Planning Structured Cabling: Selection Practice
	8.4.9	Closet H
Potential wiring closet H is a little larger than room G. Its dimensions are approximately 2.4 m wide x .9 m deep. Although its door is .9 m wide, entry into room H is through a small narrow hallway. When the door opens, it swings into the room. Water pipes run through the dropped ceiling space of the room. High voltage electrical conduits also pass through the room. Lighting is provided by an overhead incandescent light; however, the switch that turns the light on and off is located outside the doorway into the room. The floor is carpeted. There is no heating or cooling vent into the room, nor does any heating and cooling ductwork pass through the dropped ceiling space of this room. The nearest thermostat is located in the main corridor, around the corner. There is just one electrical outlet in room H.

8.4	Planning Structured Cabling: Selection Practice
	8.4.10	Closet I
Potential wiring closet I is located in the far corner of the building, next to the main entry. Its dimensions are approximately 2.4 m wide x 4.6 m deep. Room I houses the heating and cooling equipment for the building. All heating and cooling ducts to other parts of the building lead from this room. High voltage electrical conduit passes through this room along the outside walls. All walls are of concrete block construction, and are covered with fire-retardant paint. The room does not have a dropped ceiling. The floor is covered with ceramic tile. Lighting is provided by an overhead incandescent lighting fixture. The switch that turns the light on and off is located just inside the door. When the door is opened, it swings outward. Because the room houses potentially dangerous equipment, the door locks, and can be unlocked from either inside or outside the room.

8.4	Planning Structured Cabling: Selection Practice
	8.4.11	Closet J
Potential wiring closet J is located at one end of the building. Its dimensions are approximately .9 m wide x 2.4 m deep. High voltage power lines enter the building through room J. High voltage electrical conduit leads from room J to other critical areas of the building. The floor is tiled. There is a dropped ceiling. The door is .9 m wide, and swings out when opened. Because it is equipped with potentially dangerous equipment, the door to the room is kept locked. The door can be unlocked from either inside or outside the room. Lighting is provided by an overhead incandescent lighting fixture. The switch that turns the light on and off is located inside the doorway, on the right side. There are two electrical outlets in the room, and are located along opposite walls. All walls are of concrete block construction, and are covered with fire-retardant paint. A heating and cooling duct passes through the dropped ceiling space above the room, but there is no vent outlet into the room.