During 1965 - 1974, Sweden had a project which included constructions of real estates, called the million program. In total Sweden produced over a million different dwellings and some of them are now in need of different types of renovations, there among the balconies. Also, a way to increase the value for real estates is to add a balcony. This bachelor thesis will examine two constructions of balconies, one made of timber and the other of steel. The purpose with this work is to dimension two constructions and state the difficulties, dimension differences and possible restrictions considering the choice of material. Beside from the dimensioning process, the material costs will be compared. Furthermore, the report will examine if a building and demolition permit is required for the new constructions. The aim with the report is to state the pros and cons for each contructions and state the price differences. The dimensioning is made by hand based calculations, according to EKS 11 and Eurocode. To estimate the cost differences the program Bidcon is used. The balconies are designed in two different sizes but the dimensioning process is based on the larger balcony which is 7x2 m. The construction made of timber is designed with columns. To the columns, two joists are connected to hold the secondary beams. The floor decking is connected directly to the beams and the maximum height is 370 mm. The deflection can be challenging due to the material properties for timber. Timber is to prefer when it is exposed for compression load instead of tension, also due to the variety of the material properties. Except for the deflection, difficulties with the material is that it is sensitive to water and needs a specific surface treatment. The steel construction is designed with three columns connected directly to the facade. A UPE-profile is connected to the columns and represents the balcony’s shorter side. On top of the UPE-profile’s flange a L-profile is placed and will complete the frame of the balcony. Inside the frame HEA-profiles are placed which the floor decking will be connected to. The construction will have a total height of 140 mm. An advantage for steel is that it is a homogeneous material with the same capacity in all directions. Although steel is usually heavier and more expensive than timber. Steel also needs a surface treatment because it is sensitive to water and fire. However, the steel construction is to prefer when larger span is used and with limited space between the floors. The result shows that the construction made of timber is more cost effective, 45 % compared to the steel construction. For these constructions both building and demolition permit is required.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:umu-184773 |
| Date | January 2021 |
| Creators | Isaksson, Frida, Dahlberg, Julia |
| Publisher | Umeå universitet, Institutionen för tillämpad fysik och elektronik, Umeå universitet, Institutionen för tillämpad fysik och elektronik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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