Cold bridges through steel brackets

Student thesis: Master programme thesis

  • Thomas Christian Jahr
4. term, Master of Building Physics (Continuing Education Programme (Master))
This report deals with the cold bridges of steel brackets, at the interface between the architect and the engineer. Through 3 cases, 3 different typical steel brackets mounted in the climate shield are treated, the steel brackets are typically used to carry constructions such as balconies, galleries and stairs.
The cold bridge effect derives locally cooler surfaces, whereby different problems or nuisances can arise, the report examines which problems and genes can occur and when they occur.
Through the 3 cases, the significance of variations in the surrounding building parts is examined.
The first case consists of a steel bracket mounted on the edge of the concrete deck, with a steel band mounted on the top of the concrete deck. The case deals with variations in the various surrounding building parts, such as the floor construction, the facade and the back wall. The primary focus here is the risk of mold growth.
The second case deals with a lightweight cladding structure in which there are steel columns, from foundation to roof, the steel structure is attached to each edge of the concrete deck. This case will focus on both mold growth and blackening.
The third case deals with a larger steel bracket, mounted on the outside of a heavy rear wall, this case deals with the colder surfaces on the inside of the back wall that is visible, in this case the risk of nuisances like blackening.
Common to all 3 cases is the importance of the thermal bridges to the heat loss in the form of U-values and the economic cost associated with a heat loss. Likewise, the possibility of reducing the cold bridges, by minor design changes and by using cold bridge disconnectors is examined.
Publication date31 May 2019
ID: 304816026