Fan Rooms And Outdoor Air Louvers

In an all-air system, an air handling unit in a fan room circulates air through a filter and thermostatically controlled hot water and chilled water coils to condition it. The conditioned air is ducted to the occupied spaces of the building. A return fan draws air from the occupied spaces into return grilles and back to the fan room through return ducts. Just before it passes through the heating and cooling coils again, a portion of the air is diverted by a damper and exhausted through a louver...

Checklist Of Core Components

The following is an alphabetical listing of components that are often incorporated into the cores of a building. For more information on any component, follow the accompanying page reference. Drinking fountains and water coolers (page 176) Dumbwaiters and vertical conveyors Elevator lobbies Freight elevators and freight rooms Passenger elevators Service elevators and service lobbies Escalators (page 184) Fan rooms (page 165) Fire hose and fire extinguishers cabinets (page 180) Mail chutes Mail...

Planning The Internal Arrangement Of The Cores

The ratio of the total floor area of the core or cores of a building to the floor area served varies widely from one building to the next. The average total area of the cores in 40- to 70-story New York City office buildings, including the stairways, toilets, elevators, and elevator lobbies, is approximately 27 of the open area of each floor served by the core. This ratio runs as high as 38 in some older buildings, but ranges around 20 to 24 in office towers of recent design. At the other...

Index Of Occupancies

You may use the following index of uses to determine the Occupancy Group classification for your project. If the specific use for your project is not listed, choose the most similar use based on comparisons of number and density of occupants, nature of the activity, and any associated fire- or life-safety risks. Once you have determined the building code Occupancy Group classifications for your project, you can use this information throughout the other sections of this book. If you are unsure...

Lateral Load Resisting Elements

Rigid frame action is possible in column and slab systems, although its effectiveness depends on the depth of the slab, particularly in the areas close to the columns.Where large lateral forces are expected with systems with shallow slabs, a deepening of the slab or the addition of structural beams between columns may be required to achieve sufficient lateral resistance. Shear walls or braced frames may also be used to develop lateral resistance in column and slab systems. These elements may be...

Packaged Central Heating And Cooling Equipment

Packaged central heating and cooling equipment comes in two different configurations Single-packaged heating and cooling equipment combines the functions of a boiler room and chimney, a chilled water plant, and a fan room into a compact, rectangular, weatherproof unit that is specified, purchased, and installed as a single piece of equipment.The supply and return ducts from the building are connected through the roof or the wall of the building to the fan inside the packaged unit....

Ratings For Wood Light Frame Joists

Wood light frame floors with nominal 1-in. (19-mm) subflooring and finish flooring can have a 1-hour fire-resistance rating when the underside of the framing is finished with -in. (16-mm) Type X gypsum board or its equivalent. 16 (406 mm) 14 (356 mm) 117 8 (295 mm) 91 2 (241 mm) 21'-5 (6.5 m) 19'-4 (5.9 m) 15'-10 (4.8 m) 13'-4 (4.1 m) 23'-2 (7.1 m) 20'-11 (6.4 m) 17'-1 (5.2 m) 14'-5 (4.4 m) 24'-8 (7.5 m) 22'-3 (6.8 m) 18'-2 (5.5 m) 15'-4 (4.7 m) 27'-1 (8.3 m) 24'-6 (7.5 m) 20'-0 (6.1 m) 16'-10...

Variations

In direct gain passive solar heating, sunlight enters south-facing windows and warms the interior directly. Roof overhangs or louvers are configured to block out high summer sun. Internal mass (masonry, concrete, large containers of water, or small containers of phase-change salts) must be provided, Concrete floor direct gain passive solar heating Concrete floor direct gain passive solar heating attached sunspace passive solar heating attached sunspace passive solar heating preferably in direct...

Where Do I Go From Here

Once you have determined the building code Occupancy Group classifications for your project, you can use this information throughout the other sections of this book. If you are unsure of where to go next, see page xi, How to Use This Book, for suggestions on how proceed. Boarding houses Bowling alleys Children's custodial homes Children's custodial homes, not more C than 10 ambulatory persons living in a dwelling unit as a single housekeeping unit Churches, places of worship A-2 Community halls...

Configuring Stabilizing Elements

The arrangement of shear walls, diagonal braces, or rigid joints in a structure is crucial to their effectiveness in resisting lateral forces acting on the building. As illustrated in the adjacent schematic floor plans, these elements may be placed within the interior of the building or at the perimeter, and they may be combined in a variety of ways. However, they must be arranged so as to resist lateral forces acting from all directions. This is usually accomplished by aligning one set of...

Total Shaft Area

Elevator Shaft Cooling

The total open area of all the mechanical and electrical shafts in a tall office building is normally equal to about 4 of the area served on each floor, and can be estimated at about half this amount for a low-rise building. This should be divided into at least two separate shafts to relieve the congestion that would otherwise occur where the vertical and horizontal distribution networks connect. It is especially effective to provide separate shafts for supply and return ducts because it is...