GB2065743A - Rainwater drainage system for prefabricated building - Google Patents
Rainwater drainage system for prefabricated building Download PDFInfo
- Publication number
- GB2065743A GB2065743A GB8036003A GB8036003A GB2065743A GB 2065743 A GB2065743 A GB 2065743A GB 8036003 A GB8036003 A GB 8036003A GB 8036003 A GB8036003 A GB 8036003A GB 2065743 A GB2065743 A GB 2065743A
- Authority
- GB
- United Kingdom
- Prior art keywords
- trough
- drainage system
- roof
- panel
- wall panel
- 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.)
- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000012528 membrane Substances 0.000 claims description 10
- 230000000284 resting effect Effects 0.000 claims description 3
- 239000010426 asphalt Substances 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- 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
- E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
- E04D13/0404—Drainage on the roof surface
- E04D13/0409—Drainage outlets, e.g. gullies
- E04D13/0431—Drainage outlets, e.g. gullies with horizontal evacuation over the border of the roof
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
Abstract
This comprises a flat prefabricated roof panel 6 inclined downwardly towards a vertical prefabricated side wall panel 1, and an integral, moulded, one-piece trough 4 bridging the gap between the roof panel and the wall panel so that water drains from the roof panel into the trough. Trough 4 includes an outlet port 16 protruding through a hole in wall panel 1, or through a hole or gap in the roof structure. <IMAGE>
Description
SPECIFICATION
Rainwater drainage system
This invention relates to a rainwater drainage system for prefabricated buildings, such as science laboratories.
It is known to construct the roof of a prefabricated building using a prefabricated roof panel consisting of thermal insulating material sandwiched between a pair of protective skins, the top or exposed surface of the roof panel being covered with waterproof membranes such as sheets of bitumen. These roof panels are set just below the top edges of the walls of the building and are preferably tilted slightly towards one of the walls to prevent ponds forming. The water then drains through outlet pipes located in holes formed in that wall. A common problem with such a construction is that leaks develop at the junction between the roof panel and the wall, expecially in the region of the outlet pipes.
In accordance with the present invention there is provided a rainwater drainage system for the roof of a prefabricated building wherein the roof structure includes a flat prefabricated roof panel inclined downwardly toward a substantially vertical prefabricated side wall panel of the building, and wherein an integral, moulded, onepiece trough is located at the junction of the wall panel and roof structure such that water drains from the roof panel into the trough, the trough including at least one outlet port protruding through respective hole(s) or gap(s) in the wall panel or in the roof structure. The roof panel preferably terminates short of the wall panel and the trough then bridges the resulting gap. The base of the trough is preferably seated in a recessed or stepped portion of the roof structure to provide a sump from which the water drains through the outlet port or ports.
The trough is preferably moulded with a bottom, rear lip or flange which rests on the top edge surface of the roof panel. It may also include an upright front surface which lies against either the inside surface of the wall panel toward which the roof panel is sianting, or against a frame member to which the wall panel is secured, the front surface including a forwardly extending lip or flange which rests on the top surface of the wall panel or on a surface of the frame member substantially flush with the top surface of the wall panel.
Preferably the roof panel is covered with at least one waterproof membrane, the or each membrane being extended to cover the exposed surfaces of the trough. The membrane(s) assist in holding the trough in place.
The top skin of the panel is preferably a nonmetallic skin, such as plywood, since this not only reduces the response of the panel to changes in the outside temperature, but also provides a better keying surface for a subsequent layer of bitumen.
The trough may be formed, for example, of glass reinforced plastics and may be coated with an epoxy resin.
One embodiment of the invention is illustrated, by way of example only, in the accompanying drawings, in which:
Figure 1 is a sectional view taken through an outlet port of a fail-safe rainwater drainage system for the roof of a prefabricated building, and
Figure 2 is a perspective view of the water collection trough in the system of Fig. 1.
Referring to the figures, a prefabricated roof panel 6 is inclined slightly toward a prefabricated wall panel 1, and is set below the top edge 12 of the wall panel. The wall panel 1 is secured to an end frame of the building, the end frame including a top cross channel section member 3.
The roof panel 6 terminates short of the wall panel 1, and the gap is bridged by an integral, moulded, one-piece trough 4 of glass reinforced plastics material. The trough 4 includes a front surface 13 which is spaced from the inside surface of the wall panel 1 by the flanges 3a, 3b of the cross channel frame member 3, and which includes a forwardly extending lip or flange 14 resting on the top surface of the upper flange 3a.
The moulded trough also includes an integral outlet port 1 6 protruding through a hole in the wall panel and a bottom surface 1 7 with a rearwardly extending lip or flange 1 9 which rests on the top skin 20 of the roof panel 6. As shown in
Fig. 2, the trough extends the full width of wall panel 1 and includes opposed end surfaces which lie against the respective inside surfaces of two further prefabricated side wall panels 24, 25 of the building. The forwardly extending flange or lip 14 of the trough includes end portions 1 4a, 1 4b which rest respectively on the top surfaces of the wall panels 24, 25.
The roof structure also includes a fail-safe ledge 10 located beneath the trough 4 and connected to the roof panel by a cross member 1 50 that the base of the trough is seated in a stepped or recessed portion of the roof structure.
A two-layer elastomeric membrane 22 (not shown in Fig. 2) is bonded to the top skin of the roof panel, the membrane being extended over the lip or flange 1 9 to cover all the exposed surfaces of the trough. The membrane 22 provides a waterproof seal and also assists in holding the trough in place.
One advantage of this arrangement is that should puncturing of the membrane 22 occur in the area around the outlet port 1 6 of the trough, there will still be no leakage of water into the building because the water will be held in the trough.
In one alternative embodiment (not illustrated) the outlet port 16 protrudes downwardly through the ledge 10 instead of through the wall panel. In particular, the port may extend through the void between the ledge 10 and a ceiling panel 8 secured to an angle section member 7 of the end frame. It is then connected, preferably using an integral bonding technique, to a drainpipe which extends downwardly within the building to any desired location.
Claims (8)
1. A rainwater drainage system for the roof of a prefabricated building wherein the roof structure includes a flat prefabricated roof panel inclined downwardly toward a substantially vertical prefabricated side wall panel of the building, and wherein an integral, moulded, one-piece trough is located at the junction of the wall panel and the roof structure such that water drains from the roof panel into the trough, the trough including at least one outlet port protruding through respective hole(s) or gap(s) in the wall panel or in the roof structure.
2. A drainage system according to Claim 1, in which the base of the trough is seated in a recessed or stepped portion of the roof structure to provide a sump from which the water drains through the outlet port or ports.
3. A drainage system according to Claim 1 or
Claim 2, in which the roof panel terminates short of the wall panel and the trough bridges the resulting gap.
4. A drainage system according to Claim 3, in which the trough is moulded with a rearwardly extending lip or flange resting on the roof panel.
5. A drainage system according to Claim 4, in which the trough further includes an upright front surface with a top forwardly extending lip or flange resting on the top of the wall panel or on a surface substantially flush with the top of the wall panel.
6. A drainage system according to Claim 4 or
Claim 5, in which a continuous waterproof membrane is bonded to the roof panel, the membrane further extending over the rearwardly extending lip or flange of the trough to cover the exposed surfaces of the trough.
7. A drainage system according to any one of the preceding claims, in which the trough extends longitudinally between two further wall panels, and includes two upright end surfaces lying against the inside surfaces of the end wall panels.
8. A drainage system according to Claim 1, and substantially as herein described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8036003A GB2065743A (en) | 1979-11-16 | 1980-11-10 | Rainwater drainage system for prefabricated building |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7939730 | 1979-11-16 | ||
| GB8036003A GB2065743A (en) | 1979-11-16 | 1980-11-10 | Rainwater drainage system for prefabricated building |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2065743A true GB2065743A (en) | 1981-07-01 |
Family
ID=26273576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8036003A Withdrawn GB2065743A (en) | 1979-11-16 | 1980-11-10 | Rainwater drainage system for prefabricated building |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2065743A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2561280A1 (en) * | 1984-03-19 | 1985-09-20 | Prefaub Sa | Precast monolithic modules intended for the construction of buildings and their method of manufacture. |
| EP0940520A3 (en) * | 1998-03-06 | 2001-01-03 | Wolfgang Dipl.-Ing. Vahlbrauk | Drain for flat roof and flat roof with drain |
| GB2514665A (en) * | 2013-04-04 | 2014-12-03 | Noel Cahill | Device for collecting rainwater |
-
1980
- 1980-11-10 GB GB8036003A patent/GB2065743A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2561280A1 (en) * | 1984-03-19 | 1985-09-20 | Prefaub Sa | Precast monolithic modules intended for the construction of buildings and their method of manufacture. |
| EP0940520A3 (en) * | 1998-03-06 | 2001-01-03 | Wolfgang Dipl.-Ing. Vahlbrauk | Drain for flat roof and flat roof with drain |
| DE19809488C2 (en) * | 1998-03-06 | 2002-08-08 | Wolfgang Vahlbrauk | Flat roof water drain and flat roof with a flat roof water drain |
| GB2514665A (en) * | 2013-04-04 | 2014-12-03 | Noel Cahill | Device for collecting rainwater |
| GB2514665B (en) * | 2013-04-04 | 2016-03-16 | Noel Cahill | Device for collecting rainwater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |