BS EN ISO 10077-2:2012,Thermal Performance Of Windows, Doors And Shutters—Calculation Of Thermal Transmittance—Part 2:Numerical Method For Frames.
BS EN ISO 10077-2:2012 specifies a method and gives reference input data for the calculation of the thermal transmittance of frame profiles and of the linear thermal transmittance of their junction with glazing or opaque panels.
The calculation shall be carried out using a two-dimensional numerical method conforming to ISO 10211. The elements shall be divided such that any further division does not change the calculated result significantly.ISO 10211 gives criteria for judging whether sufficient sub-divisions have been used.
For the purposes of this document, the terms and definitions given in ISO 7345 and EN 12519 apply.
Download Link:BS EN ISO 10077-2:2012 pdf