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BS EN 1994-1-2:2005+A1:2014

BS EN 1994-1-2:2005+A1:2014

$215.11

Eurocode 4. Design of composite steel and concrete structures – General rules. Structural fire design

Published By Publication Date Number of Pages
BSI 2014 114
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  1. This Part 1-2 of EN 1994 deals with the design of composite steel and concrete structures for the accidental situation of fire exposure and is intended to be used in conjunction with EN 1994-1-1 and EN 1991-1-2. This Part 1-2 only identifies differences from, or supplements to, normal temperature design.

  2. This Part 1-2 of EN 1994 deals only with passive methods of fire protection. Active methods are not covered.

  3. This Part 1-2 of EN 1994 applies to composite steel and concrete structures that 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 (flame, hot gases, excessive heat) beyond designated areas (separating function).

  4. This Part 1-2 of EN 1994 gives principles and application rules (see EN 1991-1-2) for designing structures for specified requirements in respect of the aforementioned functions and the levels of performance.

  5. This Part 1-2 of EN 1994 applies to structures, or parts of structures, that are within the scope of EN 1994-1-1 and are designed accordingly. However, no rules are given for composite elements which include prestressed concrete parts.

  6. For all composite cross-sections longitudinal shear connection between steel and concrete should be in accordance with EN 1994-1-1 or be verified by tests (see also 4.3.4.1.5 and Annex I).

  7. Typical examples of concrete slabs with profiled steel sheets with or without reinforcing bars are given in Figure 1.1.

  8. Typical examples of composite beams are given in Figures 1.2 to 1.5. The corresponding constructional detailing is covered in section 5.

  9. Typical examples of composite columns are given in Figures 1.6 to 1.8. The corresponding constructional detailing is covered in section 5.

  10. Different shapes, like circular or octagonal cross-sections may also be used for columns. Where appropriate, reinforcing bars may be replaced by steel sections.

  11. The fire resistance of these types of constructions may be increased by applying fire protection materials.

    NOTE: The design principles and rules given in 4.2, 4.3 and 5 refer to steel surfaces directly exposed to the fire, which are free of any fire protection material, unless explicitly specified otherwise.

  12. P The methods given in this Part 1-2 of EN 1994 are applicable to structural steel grades S235, S275, S355, S420 and S460 of EN 10025, EN 10210-1 and EN 10219-1.

  13. For profiled steel sheeting, reference is made to section 3.5 of EN 1994-1-1.

  14. Reinforcing bars should be in accordance with EN 10080.

  15. Normal weight concrete, as defined in EN 1994-1-1, is applicable to the fire design of composite structures. The use of lightweight concrete is permitted for composite slabs.

  16. This part of EN 1994 does not cover the design of composite structures with concrete strength classes lower than C20/25 and LC20/22 and higher than C50/60 and LC50/55.

    NOTE : Information on Concrete Strength Classes higher than C50/60 is given in section 6 of EN 1992-1-2. The use of these concrete strength classes may be specified in the National Annex.

  17. For materials not included herein, reference should be made to relevant CEN product standards or European Technical Approval (ETA).

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BS EN 1994-1-2:2005+A1:2014
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