Fyra trädgårdar på bjälklag
This thesis discusses issues relating to the design and construction of roof gardens. The focus is on whether roof gardens constitute a specific habitat which demands plant material with certain characteristics, and on how the design of a roof garden can be affected by the underlying joist construct...
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| Formato: | Otro |
| Lenguaje: | sueco sueco |
| Publicado: |
2009
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| Materias: | |
| Acceso en línea: | https://stud.epsilon.slu.se/12717/ |
| _version_ | 1855572118106800128 |
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| author | Lundbladh, Karolina |
| author_browse | Lundbladh, Karolina |
| author_facet | Lundbladh, Karolina |
| author_sort | Lundbladh, Karolina |
| collection | Epsilon Archive for Student Projects |
| description | This thesis discusses issues relating to the design and construction of roof gardens. The focus is on whether roof gardens constitute a specific habitat which demands plant material with certain characteristics, and on how the design of a roof garden can be affected by the underlying joist construction. The result is based on a comparative case study of four projects in Malmö and Copenhagen.Each project has been studied through visits, reviews of the construction drawings and interviews with the landscape architect behind the project. Subsequently the projects were discussed, analyzed and
compared with each other.
The study shows that the habitat in the four cases differs greatly. Some gardens are sheltered from wind while others are exposed to it; some are exposed to sun while others lie in shadow for most of the day; some gardens contain soil depths similar to those in a regular garden while others have shallow soil substrates. I have therefore drawn the conclusion that roof gardens cannot be classified as a specific habitat. In fact, the joist construction only marginally affects the habitat created in a roof garden. The exception is when the roof has a low load-bearing capacity. Since the soil is the heaviest component in a roof garden, such roofs often contain shallow soil substrates. The shallower the substrate is, the easier it dries out. However, weak roof constructions are unusual in modern buildings. In a roof garden, plant material with certain characteristics should be chosen. The most important factors to take into consideration are the expected weight and height of the plants, drought tolerance and the plant's ability to adjust to a new environment. Plants with aggressive root systems should be avoided.
In terms of the design of roof gardens, the study shows that the joist construction affected the design most when it had a low load-bearing capacity. When that is the case, soil depth and, consequently, plant material is limited. The design can also be moderated if heavy objects have to be placed on the strongest areas of the roof. If the roof has a high load-bearing capacity the design is not affected as dramatically. Rather the joist construction adds a couple of extra elements that must be taken into consideration when
designing the garden. Some examples are raised planting beds, stairs and access ramps, and garage driveways that protrude in the garden.
Other conclusions drawn from the study are that specialized products for roof garden construction, such as root barriers and light-weight soil substrates, are not always necessary, that surrounding and underlying buildings should be designed with the roof garden environment in mind, and that semi-extensive green roofs are a sustainable alternative to traditional roof gardens. |
| format | Otro |
| id | RepoSLU12717 |
| institution | Swedish University of Agricultural Sciences |
| language | Swedish swe |
| publishDate | 2009 |
| publishDateSort | 2009 |
| record_format | eprints |
| spelling | RepoSLU127172017-10-20T07:21:05Z https://stud.epsilon.slu.se/12717/ Fyra trädgårdar på bjälklag Lundbladh, Karolina Landscape Architecture (until 121231) Landscape architecture This thesis discusses issues relating to the design and construction of roof gardens. The focus is on whether roof gardens constitute a specific habitat which demands plant material with certain characteristics, and on how the design of a roof garden can be affected by the underlying joist construction. The result is based on a comparative case study of four projects in Malmö and Copenhagen.Each project has been studied through visits, reviews of the construction drawings and interviews with the landscape architect behind the project. Subsequently the projects were discussed, analyzed and compared with each other. The study shows that the habitat in the four cases differs greatly. Some gardens are sheltered from wind while others are exposed to it; some are exposed to sun while others lie in shadow for most of the day; some gardens contain soil depths similar to those in a regular garden while others have shallow soil substrates. I have therefore drawn the conclusion that roof gardens cannot be classified as a specific habitat. In fact, the joist construction only marginally affects the habitat created in a roof garden. The exception is when the roof has a low load-bearing capacity. Since the soil is the heaviest component in a roof garden, such roofs often contain shallow soil substrates. The shallower the substrate is, the easier it dries out. However, weak roof constructions are unusual in modern buildings. In a roof garden, plant material with certain characteristics should be chosen. The most important factors to take into consideration are the expected weight and height of the plants, drought tolerance and the plant's ability to adjust to a new environment. Plants with aggressive root systems should be avoided. In terms of the design of roof gardens, the study shows that the joist construction affected the design most when it had a low load-bearing capacity. When that is the case, soil depth and, consequently, plant material is limited. The design can also be moderated if heavy objects have to be placed on the strongest areas of the roof. If the roof has a high load-bearing capacity the design is not affected as dramatically. Rather the joist construction adds a couple of extra elements that must be taken into consideration when designing the garden. Some examples are raised planting beds, stairs and access ramps, and garage driveways that protrude in the garden. Other conclusions drawn from the study are that specialized products for roof garden construction, such as root barriers and light-weight soil substrates, are not always necessary, that surrounding and underlying buildings should be designed with the roof garden environment in mind, and that semi-extensive green roofs are a sustainable alternative to traditional roof gardens. Examensarbetet behandlar gestaltning, växtbäddsuppbyggnad och växtval i trädgårdar på bjälklag. Det som har undersökts är om trädgårdar på bjälklag utgör en speciell ståndort som kräver ett växtmaterial med vissa egenskaper, och hur en takträdgårds gestaltning påverkas av bjälklagskonstruktionen. Resultatet grundar sig i en jämförande fallstudie av fyra projekt i Öresundsregionen. Respektive projekt har studerats genom platsbesök, granskning av bygghandlingar och en intervju med landskapsarkitekten som ritat projektet. Därefter har projekten jämförts, diskuterats och analyserats . Studien visar att växtmiljön i de olika projekten skiljer sig mycket åt. Från skyddade miljöer till vindutsatta, från djupt skuggiga till soliga, från att innehålla tjocka fuktighetshållande jordlager till att innehålla extremt tunna och torra växtbäddar. Därför har jag dragit slutsatsen att trädgårdar på bjälklag inte utgör en speciell ståndort. I själva verket påverkar bjälklagskonstruktionen i mycket liten utsträckning vilken ståndort som skapas i en takträdgård. Undantaget är när takkonstruktionen har en begränsad lastkapacitet. På sådana tak blir jordlagren ofta mycket tunna, eftersom jordsubstratet är det som väger mest i en anläggning. En tunn växtbädd torkar lätt ut, därför ställs stora krav på det växtmaterial som används. Svaga tak är emellertid inte särskilt vanliga i moderna bjälklagsprojekt. I bjälklagsträdgårdar bör man välja växter med vissa egenskaper. De viktigaste aspekterna att ta hänsyn till är växternas rotaggressivitet, vikt och höjd, torktålighet och anpassningsförmåga. Vad gäller gestaltning av trädgårdar på bjälklag visar studien att bjälklagskonstruktionen har haft störst inverkan på gestaltningen i de studerade projekten när taket haft en låg lastkapacitet. Då begränsas växtbäddsdjupet och därmed växtmaterialet i stor utsträckning. Formen kan också styras genom att tunga element måste placeras på taket bärande punkter. Är bjälklagets lastkapacitet hög påverkas formen inte lika tydligt. Det blir snarare så att bjälklagskonstruktionen bidrar med några extra aspekter att ta hänsyn till vid gestaltningen, t ex upphöjda växtbäddar, trappor eller ramper och garagenedfarter som sticker upp i gården. Andra slutsatser som jag drar är att specialgjorda produkter för bjälklagsträdgårdar inte alltid är nödvändiga, att omgivande och underliggande byggnader bör gestaltas med tanke på den trädgårdsmiljö som skapas och att semi-extensiva gröna tak är ett hållbart alternativ till traditionella intensiva takträdgårdar. 2009-08-20 Other NonPeerReviewed application/pdf sv https://stud.epsilon.slu.se/12717/1/lundbladh_k_171020.pdf Lundbladh, Karolina, 2009. Fyra trädgårdar på bjälklag : en jämförande fallstudie. UNSPECIFIED, Alnarp. Alnarp: (LTJ, LTV) > Dept. Of Landscape Architecture, Planning and Management <https://stud.epsilon.slu.se/view/divisions/LMNR=3A644.html> urn:nbn:se:slu:epsilon-s-8062 swe |
| spellingShingle | Landscape Architecture (until 121231) Landscape architecture Lundbladh, Karolina Fyra trädgårdar på bjälklag |
| title | Fyra trädgårdar på bjälklag |
| title_full | Fyra trädgårdar på bjälklag |
| title_fullStr | Fyra trädgårdar på bjälklag |
| title_full_unstemmed | Fyra trädgårdar på bjälklag |
| title_short | Fyra trädgårdar på bjälklag |
| title_sort | fyra trädgårdar på bjälklag |
| topic | Landscape Architecture (until 121231) Landscape architecture |
| url | https://stud.epsilon.slu.se/12717/ https://stud.epsilon.slu.se/12717/ |