BS EN 1996-1-2:2005

Foreword
Background of the Eurocode programme
Status and field of application of Eurocodes
National Standards implementing Eurocodes
Links between Eurocodes and products harmonised technical
specifications (ENs and ETAs)
Additional information specific to EN 1996-1-2
National Annex for EN 1996-1-2
Section 1. General
 1.1 Scope
 1.2 Normative references
 1.3 Assumptions
 1.4 Distinction between Principles and application Rules
 1.5 Definitions
      1.5.1 Special terms relating to fire design in general
      1.5.2 Special terms relating to calculation methods
 1.6 Symbols
 Section 2. Basic principles and rules
 2.1 Performance requirement
      2.1.1 General
      2.1.2 Nominal fire exposure
      2.1.3 Parametric fire exposure
 2.2 Actions
 2.3 Design values of material properties
 2.4 Assessment methods
      2.4.1 General
      2.4.2 Member analysis
      2.4.3 Analysis of part of the structure
      2.4.4 Global structural analysis
 Section 3. Materials
 3.1 Units
 3.2 Mortar
 3.3 Mechanical properties of masonry
      3.3.1 Mechanical properties of masonry at normal temperature
      3.3.2 Strength and deformation properties of masonry at
             elevated temperature
             3.3.2.1 General
             3.3.2.2 Unit mass
      3.3.3 Thermal properties
             3.3.3.1 Thermal elongation
             3.3.3.2 Specific heat capacity
             3.3.3.3 Thermal conductivity
Section 4. Design Procedures for obtaining fire resistance
            of masonry walls
 4.1 General information on the design of walls
      4.1.1 Wall types by function
      4.1.2 Cavity walls and untied walls comprising independent
             leaves
 4.2 Surface finishes - rendering mortar and plaster
 4.3 Additional requirements for masonry walls
 4.4 Assessment by testing
 4.5 Assessment by tabulated data
 4.6 Assessment by calculation
Section 5. Detailing
 5.1 General
 5.2 Junctions and joints
 5.3 Fixtures, pipes and cables
Annex A (Informative) Guidance on selection of fire
        resistance periods
Annex B (Normative) Tabulated fire resistance of masonry walls
Annex C (Informative) Simplified calculation model
Annex D (Informative) Advanced calculation method
Annex E (Informative) Examples of connections that meet the
        requirements of Section 5

Specifies the design of masonry structures for the accidental situation of fire exposure.

(1)P This Part 1-2 of EN 1996 deals with the design of masonry structures for the accidental situation of fire exposure, and is intended to be used in conjunction with EN 1996-1-1, EN 1996-2, 1996-3 and EN 1991-1-2. This part 1-2 only identifies differences from, or supplements to, normal temperature design.

(2)P This Part 1-2 deals only with passive methods of fire protection. Active methods are not covered.

(3)P This Part 1-2 applies to masonry structures which, for reasons of general fire safety, are required to fulfil certain functions when exposed to fire, in terms of:

• avoiding premature collapse of the structure (load bearing function)
• limiting fire spread (flames, hot gases, excessive heat) beyond designated areas (separating function)

(4)P This Part 1-2 gives principles and application rules for designing structures for specified requirements in respect of the aforementioned functions and levels of performance.

(5)P This Part 1-2 applies to structures, or parts of structures, that are within the scope of EN 1996-1-1, EN 1996-2 and EN 1996-3 and are designed accordingly.

(6)P This Part 1-2 does not cover masonry built with Natural Stone units to EN771-6

(7)P This Part 1-2 deals with the following:

• non-loadbearing internal walls.
• non-loadbearing external walls.
• loadbearing internal walls with separating or non-separating functions.
• loadbearing external walls with separating or non-separating functions.