A dropped ceiling is a secondary ceiling, hung below the main (structural) ceiling. It may also be referred to as a drop ceiling, T-bar ceiling, false ceiling, suspended ceiling, grid ceiling, drop in ceiling, drop out ceiling, or ceiling tiles and is a staple of modern construction and architecture in both residential and commercial applications.
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
History
Dropped ceilings and ceiling tiles were being used in Japan for aesthetic reasons as early as the Muromachi Period (1337 to 1573).[1] Blackfriars Theater in London, England, built in 1596, had dropped ceilings to aid acoustics.[2]
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
U. S. Patent No. 1,470,728 for modern dropped ceilings was applied for by E. E. Hall on May 28, 1919 and granted on October 16, 1923.[3] Initially modern dropped ceilings were built using interlocking tiles and the only way to provide access for repair or inspection of the area above the tiles was by starting at the edge of the ceiling, or at a designated "key tile", and then removing contiguous tiles one at a time until the desired place of access was reached. Once the repair or inspection was completed, the tiles had to be reinstalled. This process could be very time-consuming and expensive. On September 8, 1958 Donald A. Brown of Westlake, Ohio filed for a patent for Accessible Suspended Ceiling Construction. This invention provided suspended ceiling construction in which access may readily be obtained at any desired location. Patent Number US 2,984,946 A was granted on May 23, 1961.[4] Brown has sometimes been credited as being the inventor of the dropped ceiling [5] even though other patents preceded his as shown in the table below.
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
Aesthetics
Modern dropped ceilings were initially created to hide the building infrastructure, including piping, wiring, and/or ductwork,[3] by creating a plenum space above the dropped ceiling, while allowing access for repairs and inspections. Drop ceilings may also be used to hide problems, such as structural damage. Further, drop out ceilings can also conceal the sprinkler systems while still providing full fire suppression functionality.
For many years, dropped ceilings were made of basic white tiles, but modern innovations now offer a plethora of options in sizes, colors, materials (including retro designs and faux leather, wood, or metal), visual effects and shapes, patterns, and textures as well as support systems and ways to access the plenum.[7] Custom runs of specialty ceiling tiles can be done at relatively low cost compared with the past.
Acoustics
Acoustic balance and control was another early objective of dropped ceilings.[8] A noisy room can overstimulate occupants, while a too quiet interior may seem dull and uninviting.
The acoustic performance of suspended ceilings has improved dramatically over the years, with enhanced sound absorption and attenuation. This is sometimes achieved by adding insulation known as Sound Attenuation Batts (SABs), more commonly referred to as "sound batts", above the panels to help deaden sounds and keep adjacent rooms quieter.[9]
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
Concealed grid[edit]
Interlocked panels can be "slid" across and out of the grid
An older, less common type of dropped ceiling is the concealed grid system. This type of dropped ceiling employs a method of interlocking panels into each other and the grid with the use of small strips of metal called 'splines', thus making it difficult to remove panels to gain access above the ceiling without damaging the installation or the panels. Normally, these type of ceilings will have a "key panel" (usually in the corner) which can be removed, allowing for the other panels to be slid out of the grid (a series of metal channels called 'z bars') one by one, until eventually removing the desired panel. This type of ceiling is more commonly found in older installations or installations where access to above the ceiling is generally considered unnecessary.
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
This system has some major disadvantages compared to the more common "drop panel" system, most notably the difficulty in removing and reattaching panels from the grid, which in some cases can cause irreparable damage to the panels removed. Finding replacement panels for this type of dropped ceiling is becoming increasingly more difficult as demand for them is slowing, as is production of the parts. Small clips are still available which allow tiles to be inserted into gaps in the ceiling where a tile is missing, they work by being placed on the edge of a concealed tile, then being slid along as the tile is placed to 'lock' it in place.
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
History
Dropped ceilings and ceiling tiles were being used in Japan for aesthetic reasons as early as the Muromachi Period (1337 to 1573).[1] Blackfriars Theater in London, England, built in 1596, had dropped ceilings to aid acoustics.[2]
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
U. S. Patent No. 1,470,728 for modern dropped ceilings was applied for by E. E. Hall on May 28, 1919 and granted on October 16, 1923.[3] Initially modern dropped ceilings were built using interlocking tiles and the only way to provide access for repair or inspection of the area above the tiles was by starting at the edge of the ceiling, or at a designated "key tile", and then removing contiguous tiles one at a time until the desired place of access was reached. Once the repair or inspection was completed, the tiles had to be reinstalled. This process could be very time-consuming and expensive. On September 8, 1958 Donald A. Brown of Westlake, Ohio filed for a patent for Accessible Suspended Ceiling Construction. This invention provided suspended ceiling construction in which access may readily be obtained at any desired location. Patent Number US 2,984,946 A was granted on May 23, 1961.[4] Brown has sometimes been credited as being the inventor of the dropped ceiling [5] even though other patents preceded his as shown in the table below.
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
Aesthetics
Modern dropped ceilings were initially created to hide the building infrastructure, including piping, wiring, and/or ductwork,[3] by creating a plenum space above the dropped ceiling, while allowing access for repairs and inspections. Drop ceilings may also be used to hide problems, such as structural damage. Further, drop out ceilings can also conceal the sprinkler systems while still providing full fire suppression functionality.
For many years, dropped ceilings were made of basic white tiles, but modern innovations now offer a plethora of options in sizes, colors, materials (including retro designs and faux leather, wood, or metal), visual effects and shapes, patterns, and textures as well as support systems and ways to access the plenum.[7] Custom runs of specialty ceiling tiles can be done at relatively low cost compared with the past.
Acoustics
Acoustic balance and control was another early objective of dropped ceilings.[8] A noisy room can overstimulate occupants, while a too quiet interior may seem dull and uninviting.
The acoustic performance of suspended ceilings has improved dramatically over the years, with enhanced sound absorption and attenuation. This is sometimes achieved by adding insulation known as Sound Attenuation Batts (SABs), more commonly referred to as "sound batts", above the panels to help deaden sounds and keep adjacent rooms quieter.[9]
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
Concealed grid[edit]
Interlocked panels can be "slid" across and out of the grid
An older, less common type of dropped ceiling is the concealed grid system. This type of dropped ceiling employs a method of interlocking panels into each other and the grid with the use of small strips of metal called 'splines', thus making it difficult to remove panels to gain access above the ceiling without damaging the installation or the panels. Normally, these type of ceilings will have a "key panel" (usually in the corner) which can be removed, allowing for the other panels to be slid out of the grid (a series of metal channels called 'z bars') one by one, until eventually removing the desired panel. This type of ceiling is more commonly found in older installations or installations where access to above the ceiling is generally considered unnecessary.
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
This system has some major disadvantages compared to the more common "drop panel" system, most notably the difficulty in removing and reattaching panels from the grid, which in some cases can cause irreparable damage to the panels removed. Finding replacement panels for this type of dropped ceiling is becoming increasingly more difficult as demand for them is slowing, as is production of the parts. Small clips are still available which allow tiles to be inserted into gaps in the ceiling where a tile is missing, they work by being placed on the edge of a concealed tile, then being slid along as the tile is placed to 'lock' it in place.
http://www.modelinteriors.co.in/false-ceiling-in-kolkata.html
No comments:
Post a Comment