CA1062431A - High-performance dry-construction fire-resistant roof/ceiling assembly - Google Patents
High-performance dry-construction fire-resistant roof/ceiling assemblyInfo
- Publication number
- CA1062431A CA1062431A CA272,079A CA272079A CA1062431A CA 1062431 A CA1062431 A CA 1062431A CA 272079 A CA272079 A CA 272079A CA 1062431 A CA1062431 A CA 1062431A
- Authority
- CA
- Canada
- Prior art keywords
- roof
- ceiling assembly
- roof construction
- ceiling
- heat sink
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010276 construction Methods 0.000 title claims abstract description 37
- 230000009970 fire resistant effect Effects 0.000 title claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000036571 hydration Effects 0.000 claims abstract description 8
- 238000006703 hydration reaction Methods 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims description 27
- 229910052602 gypsum Inorganic materials 0.000 claims description 14
- 239000010440 gypsum Substances 0.000 claims description 14
- 230000004888 barrier function Effects 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 230000000284 resting effect Effects 0.000 claims description 2
- 229940000425 combination drug Drugs 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 9
- 239000000835 fiber Substances 0.000 description 6
- 239000012528 membrane Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011094 fiberboard Substances 0.000 description 2
- 239000002557 mineral fiber Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/001—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by provisions for heat or sound insulation
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
- E04D13/1606—Insulation of the roof covering characterised by its integration in the roof structure
- E04D13/1643—Insulation of the roof covering characterised by its integration in the roof structure the roof structure being formed by load bearing corrugated sheets, e.g. profiled sheet metal roofs
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Building Environments (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Abstract
Abstract of the Disclosure A layered roof construction and a suspended ceiling assembly are provided with a heat sink to help the ceiling assembly secure a desired fire rating. In order to prevent the buildup of heat in the plenum area between the layered roof construction and the suspended ceiling assembly, a heat sink with water of hydration is positioned in the layered roof construction to help assist in the absorption of heat passed through to the plenum area during a fire rating test.
Description
~o~Z9~i3:~ ~
-- The invention is directed to a combination roof and ceiling construction and, more particularly, to a fire rated ceiling assembly used in conjunction with a heavily insulated roof construction.
Description of the Prior Art ~ .
U.S. Patent No. 3,068,535 is directed to a conventional roof structure which utilizes a metal roof deck, a fiberboard roofing insulation and a water-resistant outer barrier coating.
U.S. Patent No. 3,483,664 is directed to another example of a conventional roof structure wherein the roof is provided with a support 26, fiberboard insulation 27, and a water-resistant outer barrier thereover.
Finally, U.S. Patent No. 3,763,614 is directed to a :
specialty roof structure wherein a gypsum board fire barrier is placed between a roof deck 12 and a flammable foam insulation 16.
The object herein is to provide a roof aonstruction and ceiling assembly wherein the ceiling assembly secures an acceptable fire rating due to the limited heat buildup in the ;~
plenum area between the roof construction and suspended ceiling assembly. The roof construction incorporates a material which operates as a heat sink to soak up excessive heat which is ':
; developed in the plenum area during a conventional fire rating test for the suspended ceiling assembly.
Summary of the Invention -~
' . '-The invention is directed to a conventional roof structure which utilizes a roof support means having thereover a metal roof deck. Positioned on the metal roof deck is a heat sink material, such as gypsum board, which contains water of hydration. Overtop of the heat sink there is placed fiber - 30 insulation, and finally over this there is placed bituminous ; ~ treated felt paper to form a water-resistant barrier for the ,. ,~, :
;Z~a3~L
outside o~ the ~oof stxucture. Below the xoof support means there is positioned a suspended ceiling assembly, and between the suspended ceiling assembly and the roof support means there is defined a plenum area.
Thus, in accordance with the present teachings, an improvement is provided in a roof construction and ceiling assembly combination when the roof construction comprises a ~,r;,., roof support means with a metal deck having an upper surface and a lower surface resting on the roof support means with a layer of thermal insulation positioned ab~ve the upper surface of the roof deck and a water barrier above the layer of thermal insulation forming the exterior of the roof construction with the ceiling assembly comprising a grid runner system suspended from the roof support means with ire resistant ceiling boards positioned within the grid runner system to form a fire resistant barrier with a plenum area formed between the ceiling assembly and the roof construction.
The improvement provided in the roof construction and ceiling `
assembly combination comprises a heat sink means which is positioned between the roof deck and the layers of thermal insulation to absorb excess heat in the plenum area, the heat sink means containiny water of hydration which is released at a temperature of about 250F or higher.
In accordance with a urther embodiment an improvement is provided in the method of securing an improved fire rating for a combination roof construction and ceiling assembly wherein the roof construction comprises a roof support, metal roof ~ , deck thereover with a layer of thermal insulation thereover and a water barrier thereover and the ceiling assembly comprises a `~
grid runner system and fire resistant ceiling boards mounted therein with a plenum chamber being provided between the roof construction and ceiling assembly. The improv~ment in the method ~L ;
~2 -.
" ~06243~ `
comprises providing a material Which acts as a heat sink with water of hyaration which is positioned in the roof construction between the plenum area and the layer of thermal insulation 'and utilizing the heat sink as a means ~or absorbing heat in the plenum area to improve the fire rating characteristics of the suspended ceiling assembly-roof construction combination. x Brief Description o~ the Drawing The drawing is a cross-sectional view of the invention ' -`
, herein.
Description of the Preferred Embodiments `, 10 `?
, A problem associated with the designing of fire- ,` :
resistant, dry construction roof constructions and ceiling assem- `
blies employin~ fire-resistant suspended membrane ceilings as ?
a fire protection membrane is that the roof insulation of the .. . .
,"? roof construction placed over the steel deck of the roof ~;i ~ construction confines heat within the plenum area between the '!,$~ rOOL construction and the ceiling assembly so that with a fire qj in the room below the ceiling assembly, there is a rapid heat -j buildup in the plenum area with the generation of excessive '"~ 20 temperatures in the plenum area early in a conventional ASTM
E-ll9 fire-resistance test for the ceiling assembly. Typically, ~;i only 1 to 1-1/2 inches of roof insulation would normally be '~ employed along with a conventional fire-resistant suspended ;
ceiling assembly if the usual one-hour ire-resistant test `~, rating were desired. However, due to the current energy crisis, an efficient energy conserving roof structure requires consider-i;/,:
'~ ably more insulation, usually between 2 inches to 6 inches, . . I , ;1. depending upon the geographic location of the buiiding and type -of insulation used.
~`ii' 30 The invention herein consists in the providing of a material sandwiched between the rovf insulation and the steel roof deck of the ceiling construction so that the material provided will act as a heat sink, absorbing heat from the plenum space in a manner similar to the way in which concrete 2a -10~43~L ;
acts as a heat sink in a typical floor and ceiling fire- ;
resistant assembly. Gypsum board, ~hich contains water of hydration, makes a good heat sink. Indications are that a typical gypsum board will extend the fire-resistant rating times for as much as 45 minutes. The gypsum board is a good material to use because of its stability and other desirable properties at room temperaturej as well as its relatively low temperature of dehydration (250F.-1000F.). The gypsum board further pro-vides an advantage in that it provides a~leveling and traveling . . .
j 10 surface on which to mount the insulation for the roof, and :s. . :
further, the gypsum board improves the membrane strength in the roof deck. Other materials that can be used are vermiculite-concrete board or other low density concrete board.
Referring now to the figure of the drawing, a conven-~ tional roof construction and ceiling assembly is shown. Con-.;
ventional roof construction would normally be provided with ~ ~ elements l, 2, 4, and 5. Element l is a conventional water ; barrier for the exterior of the roof. It would normally be . . . .
composed of a number o~ laye~s of bituminous roofing felt .. .: .~ . .
;~ 20 material adhered in position through the use of tar or a like . . .
material. Such a structure is typical in the art, as shown in U.S. Patents No. 3,068,535 and 3,483,664.
Below the water barrier 1 there would be placed in-sulating boards 2. ~lhese boards would normally be one or more layers of insulating material such as inorganic mineral fibers, :,:
glass fibers, or similar type inorganic fiber structures. The structures are ric~id, are fire resistant, and provide a desirable ` insulation rating to the roof structure.
,j.~
; Normally, the insulation would be supported on a con-ventional metal corrugated or fluted roof deck 4, such as the commerically available Robertson roof deck. ~ll this is in turn supported on a roof support means, which would be typically a ' ~ , ` ` 1~62431 ; metal bar joist, truss or beam structural element.
Below the roof construction, a conventional suspended `;
ceiling 6 is positioned. The ceiling is hung from the roof ;
support means S through suspension wires and a conventional metal ceiling suspension system. The ceiling suspension system in turn , : . -holds fire-resistant mineral fiber ceiling boards in position.
U.S. Patent No. 3,889,435 is typical of a conventional fire- -resistant suspended ceiling system. In the area between the roof deck 4 and the top of the suspended ceiling system 6, there is defined an open area which is called a ~Iplenum~. During a typical fire test to secure a desired rating for the suspended ceiling system 6, the temperature within the plenum area must ; be held to certain acceptable levels. With a typical roof structure, which only employs 1 to 1-1/2 inches of roof in-sulation, the plenum temperature during a fire test would be ,~ kept at an acceptable level. However, with the use of two or more inches of insulation in the roof structure, the heat loss - :
~;` in the roof was cut down to the point that excessive heat would build up within the plenum area. The provision of a heat sink 3 with water of hydration became necessary as a means to ,.~ ~, absorb this excess heat in order to secure the desired fire ,,':' ,`., :
;;~ rating for the suspended ceiling system. Through the use of ,;' 3/8 inch, 1/2 illch and 5/8 inch board 3 acting as a heat sink, such as gypsum board, it was possible to improve the plenum temperature conditions to hold them to an acceptable temperature ~ for a one-hour fire test. The gypsum board utilized need not be ,i~ the special fire resistant, fiber-containing gypsum board, but,.,.,.,,., ~
could simply be the conventional gypsum board utilized for dry-wall constructions.
~,,,, . :
The gypsum board had a further advantage in that it ~ -provided strength to the rigid fiber insulation. While the s-~
;,i . .~
fiber insulation is rigid, it would not always support the ~,,,,,.,~ ~, .
... . .
6;Z~3~
weight of a workman, particularly in those areas where the fiber . :
was bridging the gaps of a corrugated roof structure. Gypsum board now provided a ridge over the gaps of the corrugated roof deck so that workmen can walk on the rigid fiber insulation without having their feet pass therethrough into the corrugation of the roof deck. ~ .
.
~. . .
.
. ' ;
,''",'"
. ~
, ~ :
., . .
.~1 20 :-.,., . .:
. ` ! , '~ii .
!~ ~
~!
;,, .
'"`' :
.~ - 5
-- The invention is directed to a combination roof and ceiling construction and, more particularly, to a fire rated ceiling assembly used in conjunction with a heavily insulated roof construction.
Description of the Prior Art ~ .
U.S. Patent No. 3,068,535 is directed to a conventional roof structure which utilizes a metal roof deck, a fiberboard roofing insulation and a water-resistant outer barrier coating.
U.S. Patent No. 3,483,664 is directed to another example of a conventional roof structure wherein the roof is provided with a support 26, fiberboard insulation 27, and a water-resistant outer barrier thereover.
Finally, U.S. Patent No. 3,763,614 is directed to a :
specialty roof structure wherein a gypsum board fire barrier is placed between a roof deck 12 and a flammable foam insulation 16.
The object herein is to provide a roof aonstruction and ceiling assembly wherein the ceiling assembly secures an acceptable fire rating due to the limited heat buildup in the ;~
plenum area between the roof construction and suspended ceiling assembly. The roof construction incorporates a material which operates as a heat sink to soak up excessive heat which is ':
; developed in the plenum area during a conventional fire rating test for the suspended ceiling assembly.
Summary of the Invention -~
' . '-The invention is directed to a conventional roof structure which utilizes a roof support means having thereover a metal roof deck. Positioned on the metal roof deck is a heat sink material, such as gypsum board, which contains water of hydration. Overtop of the heat sink there is placed fiber - 30 insulation, and finally over this there is placed bituminous ; ~ treated felt paper to form a water-resistant barrier for the ,. ,~, :
;Z~a3~L
outside o~ the ~oof stxucture. Below the xoof support means there is positioned a suspended ceiling assembly, and between the suspended ceiling assembly and the roof support means there is defined a plenum area.
Thus, in accordance with the present teachings, an improvement is provided in a roof construction and ceiling assembly combination when the roof construction comprises a ~,r;,., roof support means with a metal deck having an upper surface and a lower surface resting on the roof support means with a layer of thermal insulation positioned ab~ve the upper surface of the roof deck and a water barrier above the layer of thermal insulation forming the exterior of the roof construction with the ceiling assembly comprising a grid runner system suspended from the roof support means with ire resistant ceiling boards positioned within the grid runner system to form a fire resistant barrier with a plenum area formed between the ceiling assembly and the roof construction.
The improvement provided in the roof construction and ceiling `
assembly combination comprises a heat sink means which is positioned between the roof deck and the layers of thermal insulation to absorb excess heat in the plenum area, the heat sink means containiny water of hydration which is released at a temperature of about 250F or higher.
In accordance with a urther embodiment an improvement is provided in the method of securing an improved fire rating for a combination roof construction and ceiling assembly wherein the roof construction comprises a roof support, metal roof ~ , deck thereover with a layer of thermal insulation thereover and a water barrier thereover and the ceiling assembly comprises a `~
grid runner system and fire resistant ceiling boards mounted therein with a plenum chamber being provided between the roof construction and ceiling assembly. The improv~ment in the method ~L ;
~2 -.
" ~06243~ `
comprises providing a material Which acts as a heat sink with water of hyaration which is positioned in the roof construction between the plenum area and the layer of thermal insulation 'and utilizing the heat sink as a means ~or absorbing heat in the plenum area to improve the fire rating characteristics of the suspended ceiling assembly-roof construction combination. x Brief Description o~ the Drawing The drawing is a cross-sectional view of the invention ' -`
, herein.
Description of the Preferred Embodiments `, 10 `?
, A problem associated with the designing of fire- ,` :
resistant, dry construction roof constructions and ceiling assem- `
blies employin~ fire-resistant suspended membrane ceilings as ?
a fire protection membrane is that the roof insulation of the .. . .
,"? roof construction placed over the steel deck of the roof ~;i ~ construction confines heat within the plenum area between the '!,$~ rOOL construction and the ceiling assembly so that with a fire qj in the room below the ceiling assembly, there is a rapid heat -j buildup in the plenum area with the generation of excessive '"~ 20 temperatures in the plenum area early in a conventional ASTM
E-ll9 fire-resistance test for the ceiling assembly. Typically, ~;i only 1 to 1-1/2 inches of roof insulation would normally be '~ employed along with a conventional fire-resistant suspended ;
ceiling assembly if the usual one-hour ire-resistant test `~, rating were desired. However, due to the current energy crisis, an efficient energy conserving roof structure requires consider-i;/,:
'~ ably more insulation, usually between 2 inches to 6 inches, . . I , ;1. depending upon the geographic location of the buiiding and type -of insulation used.
~`ii' 30 The invention herein consists in the providing of a material sandwiched between the rovf insulation and the steel roof deck of the ceiling construction so that the material provided will act as a heat sink, absorbing heat from the plenum space in a manner similar to the way in which concrete 2a -10~43~L ;
acts as a heat sink in a typical floor and ceiling fire- ;
resistant assembly. Gypsum board, ~hich contains water of hydration, makes a good heat sink. Indications are that a typical gypsum board will extend the fire-resistant rating times for as much as 45 minutes. The gypsum board is a good material to use because of its stability and other desirable properties at room temperaturej as well as its relatively low temperature of dehydration (250F.-1000F.). The gypsum board further pro-vides an advantage in that it provides a~leveling and traveling . . .
j 10 surface on which to mount the insulation for the roof, and :s. . :
further, the gypsum board improves the membrane strength in the roof deck. Other materials that can be used are vermiculite-concrete board or other low density concrete board.
Referring now to the figure of the drawing, a conven-~ tional roof construction and ceiling assembly is shown. Con-.;
ventional roof construction would normally be provided with ~ ~ elements l, 2, 4, and 5. Element l is a conventional water ; barrier for the exterior of the roof. It would normally be . . . .
composed of a number o~ laye~s of bituminous roofing felt .. .: .~ . .
;~ 20 material adhered in position through the use of tar or a like . . .
material. Such a structure is typical in the art, as shown in U.S. Patents No. 3,068,535 and 3,483,664.
Below the water barrier 1 there would be placed in-sulating boards 2. ~lhese boards would normally be one or more layers of insulating material such as inorganic mineral fibers, :,:
glass fibers, or similar type inorganic fiber structures. The structures are ric~id, are fire resistant, and provide a desirable ` insulation rating to the roof structure.
,j.~
; Normally, the insulation would be supported on a con-ventional metal corrugated or fluted roof deck 4, such as the commerically available Robertson roof deck. ~ll this is in turn supported on a roof support means, which would be typically a ' ~ , ` ` 1~62431 ; metal bar joist, truss or beam structural element.
Below the roof construction, a conventional suspended `;
ceiling 6 is positioned. The ceiling is hung from the roof ;
support means S through suspension wires and a conventional metal ceiling suspension system. The ceiling suspension system in turn , : . -holds fire-resistant mineral fiber ceiling boards in position.
U.S. Patent No. 3,889,435 is typical of a conventional fire- -resistant suspended ceiling system. In the area between the roof deck 4 and the top of the suspended ceiling system 6, there is defined an open area which is called a ~Iplenum~. During a typical fire test to secure a desired rating for the suspended ceiling system 6, the temperature within the plenum area must ; be held to certain acceptable levels. With a typical roof structure, which only employs 1 to 1-1/2 inches of roof in-sulation, the plenum temperature during a fire test would be ,~ kept at an acceptable level. However, with the use of two or more inches of insulation in the roof structure, the heat loss - :
~;` in the roof was cut down to the point that excessive heat would build up within the plenum area. The provision of a heat sink 3 with water of hydration became necessary as a means to ,.~ ~, absorb this excess heat in order to secure the desired fire ,,':' ,`., :
;;~ rating for the suspended ceiling system. Through the use of ,;' 3/8 inch, 1/2 illch and 5/8 inch board 3 acting as a heat sink, such as gypsum board, it was possible to improve the plenum temperature conditions to hold them to an acceptable temperature ~ for a one-hour fire test. The gypsum board utilized need not be ,i~ the special fire resistant, fiber-containing gypsum board, but,.,.,.,,., ~
could simply be the conventional gypsum board utilized for dry-wall constructions.
~,,,, . :
The gypsum board had a further advantage in that it ~ -provided strength to the rigid fiber insulation. While the s-~
;,i . .~
fiber insulation is rigid, it would not always support the ~,,,,,.,~ ~, .
... . .
6;Z~3~
weight of a workman, particularly in those areas where the fiber . :
was bridging the gaps of a corrugated roof structure. Gypsum board now provided a ridge over the gaps of the corrugated roof deck so that workmen can walk on the rigid fiber insulation without having their feet pass therethrough into the corrugation of the roof deck. ~ .
.
~. . .
.
. ' ;
,''",'"
. ~
, ~ :
., . .
.~1 20 :-.,., . .:
. ` ! , '~ii .
!~ ~
~!
;,, .
'"`' :
.~ - 5
Claims (5)
1. A roof construction and ceiling assembly combina-tion;
(a) the roof construction comprising:
(1) a roof support means, (2) a metal roof deck having an upper surface and a lower surface resting on said roof support means, (3) a layer of thermal insulation positioned above the upper surface of the roof deck, (4) a water barrier above the layer of thermal insulation forming the exterior of the roof construction, (b) the ceiling assembly comprising:
(1) a grid runner system suspended from the roof support means, (2) fire resistant ceiling boards positioned within the grid runner system to form a fire resistant barrier with a plenum area formed between the ceiling assembly and roof construction, (c) the improvement comprising:
(1) a heat sink means positioned between the roof deck and layer of thermal insulation to absorb excess heat in the plenum area, (2) said heat sink means containing water of hydration which is released at a temperature of about 250°F.
or higher.
(a) the roof construction comprising:
(1) a roof support means, (2) a metal roof deck having an upper surface and a lower surface resting on said roof support means, (3) a layer of thermal insulation positioned above the upper surface of the roof deck, (4) a water barrier above the layer of thermal insulation forming the exterior of the roof construction, (b) the ceiling assembly comprising:
(1) a grid runner system suspended from the roof support means, (2) fire resistant ceiling boards positioned within the grid runner system to form a fire resistant barrier with a plenum area formed between the ceiling assembly and roof construction, (c) the improvement comprising:
(1) a heat sink means positioned between the roof deck and layer of thermal insulation to absorb excess heat in the plenum area, (2) said heat sink means containing water of hydration which is released at a temperature of about 250°F.
or higher.
2. The combination of claim 1 wherein the thermal insulation layer is over 2 inches.
3. The combination of claim 1 wherein the water of hydration is released at about 250°F.-1000°F.
4. The combination of claim 1 wherein the heat sink is gypsum board.
5. The method of securing an improved fire rating for a combination roof construction and ceiling assembly wherein:
(a) the roof construction comprises a roof support, metal roof deck thereover, layer of thermal insulation thereover and a water barrier thereover, (b) the ceiling assembly comprises a grid runner system and fire resistant ceiling boards mounted therein, (c) a plenum area between the roof construction and ceiling assembly, (d) the improvement comprises the steps of:
(1) positioning a heat sink with water of hydration in the roof construction between the plenum area and the layer of thermal insulation, and (2) utilizing the heat sink as a means for absorbing heat in the plenum area to improve the fire rating characteristics of the suspended ceiling assembly-roof construction combination.
(a) the roof construction comprises a roof support, metal roof deck thereover, layer of thermal insulation thereover and a water barrier thereover, (b) the ceiling assembly comprises a grid runner system and fire resistant ceiling boards mounted therein, (c) a plenum area between the roof construction and ceiling assembly, (d) the improvement comprises the steps of:
(1) positioning a heat sink with water of hydration in the roof construction between the plenum area and the layer of thermal insulation, and (2) utilizing the heat sink as a means for absorbing heat in the plenum area to improve the fire rating characteristics of the suspended ceiling assembly-roof construction combination.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66236176A | 1976-03-01 | 1976-03-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1062431A true CA1062431A (en) | 1979-09-18 |
Family
ID=24657392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA272,079A Expired CA1062431A (en) | 1976-03-01 | 1977-02-18 | High-performance dry-construction fire-resistant roof/ceiling assembly |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE851496A (en) |
| CA (1) | CA1062431A (en) |
| DE (1) | DE2705032C3 (en) |
| FR (1) | FR2343096A1 (en) |
| GB (1) | GB1579051A (en) |
| NL (1) | NL172354C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2906476C3 (en) * | 1978-05-02 | 1981-06-19 | Armstrong Cork Co., 17604 Lancaster, Pa. | Ceiling panel made of a fiber material for a suspended ceiling |
| ATE158338T1 (en) | 1994-06-24 | 1997-10-15 | Wolman Gmbh Dr | INTUMESCENT WATERPROOFING AGENT |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3466222A (en) * | 1967-07-26 | 1969-09-09 | Lexsuco Inc | Fire retardant insulative structure and roof deck construction comprising the same |
| DE1928698A1 (en) * | 1969-06-06 | 1970-12-10 | Ruhrmann Fa Dr Ing Josef | Apparatus for removing elements from a continuous row of elements attached to a fastener tape |
| BE786217A (en) * | 1971-07-14 | 1973-01-15 | Dow Chemical Co | ROOF ELEMENT AND ITS MANUFACTURING PROCESS |
| DD116878A1 (en) * | 1974-11-27 | 1975-12-12 |
-
1977
- 1977-02-07 DE DE19772705032 patent/DE2705032C3/en not_active Expired
- 1977-02-16 BE BE174988A patent/BE851496A/en not_active IP Right Cessation
- 1977-02-18 CA CA272,079A patent/CA1062431A/en not_active Expired
- 1977-02-24 NL NL7701968A patent/NL172354C/en not_active IP Right Cessation
- 1977-02-28 FR FR7705837A patent/FR2343096A1/en active Granted
- 1977-03-01 GB GB862277A patent/GB1579051A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2705032B2 (en) | 1980-02-21 |
| DE2705032A1 (en) | 1977-09-08 |
| GB1579051A (en) | 1980-11-12 |
| NL172354B (en) | 1983-03-16 |
| FR2343096B1 (en) | 1982-12-03 |
| BE851496A (en) | 1977-06-16 |
| NL7701968A (en) | 1977-09-05 |
| NL172354C (en) | 1983-08-16 |
| DE2705032C3 (en) | 1983-11-17 |
| FR2343096A1 (en) | 1977-09-30 |
| AU2210277A (en) | 1978-02-16 |
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