BS EN ISO 6946:1997:2003 Edition
$142.49
Building components and building elements. Thermal resistance and thermal transmittance. Calculation method
| Published By | Publication Date | Number of Pages |
| BSI | 2003 | 30 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | Committees responsible for this British�Standard |
| 3 | Contents |
| 6 | Foreword Foreword to amendment A1 Contents |
| 7 | Introduction 1 Scope 2 Normative references 3 Definitions and symbols 3.1 Definitions 3.1.1 building element 3.1.2 building component 3.1.3 design thermal value |
| 8 | 3.1.4 design thermal conductivity 3.1.5 design thermal resistance 3.1.6 thermally homogeneous layer 3.2 Symbols and units 4 Principles |
| 9 | 5 Thermal resistances 5.1 Thermal resistance of homogeneous layers 5.2 Surface resistances Table 1 Surface resistances (in m |
| 10 | 5.3 Thermal resistance of air layers Table 2 Thermal resistance (in m |
| 11 | 5.4 Thermal resistance of unheated spaces Table 3 Thermal resistance of roof spaces |
| 12 | 6 Total thermal resistance 6.1 Total thermal resistance of a building component consisting of homogeneous layers 6.2 Total thermal resistance of a building component consisting of homogeneous and inhomogeneous … |
| 13 | Figure 1 Sections and layers of a thermally inhomogeneous component |
| 15 | 7 Thermal transmittance |
| 16 | Annex A (normative) Surface resistance A.1 Plane surfaces Table A.1 Values of the black-body radiative coefficient |
| 17 | Table A.2 Values of Rse at various wind speeds A.2 Components with non-planar surfaces Figure A.1 Actual and projected areas |
| 18 | Annex B (normative) Thermal resistance of unventilated airspaces B.1 General B. 2 Unventilated airspaces with length and width both more than 10 times thickness |
| 19 | B.3 Small or divided unventilated airspaces (air voids) Figure B.1 Dimensions of small airspace Annex C (normative) Calculation of the thermal transmittance of components with tapered layers C.1 General |
| 20 | Figure C.1 Principle of build-up of component Figure C.2 Examples of how to subdivide roofs into individual parts C. 2 Calculation for common shapes |
| 21 | C.2.1 Rectangular area C.2.2 Triangular area, thickest at apex C.2.3 Triangular area, thinnest at apex C.3 Calculation procedure |
| 22 | Annex D (normative) Corrections to thermal transmittance D.1 General D.2 Correction for air gaps |
| 23 | D.3 Correction for mechanical fasteners Table D.2 Values of coefficient a D.4 Correction procedure for inverted roofs D.4.1 General |
| 24 | D.4.2 Symbols and units D.4.3 Correction due to water flowing between the insulation and the waterproofing membrane D.4.4 Correction to thermal conductivity |
| 25 | Annex E (informative) Examples of corrections for air gaps |
| 28 | Annex ZA (normative) Normative references to International Standards and corresponding European publications |
