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Partial load factor for self-weight of slabs in multiple-floor buildings.

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Title: Partial load factor for self-weight of slabs in multiple-floor buildings.
Authors: Fernández Ruiz, Miguel1 (AUTHOR) miguel.fernandezruiz@upm.es, Sagaseta, Juan2 (AUTHOR), Viula Faria, Duarte3 (AUTHOR)
Source: Magazine of Concrete Research. 2026, Vol. 78 Issue 5/6, p372-389. 18p.
Subjects: Concrete slabs, Load factor design, Multipurpose buildings, Dead loads (Mechanics), Building design & construction, Structural analysis (Engineering)
Abstract: In building design, the partial load factor (PLF) for the self-weight of slabs is independent of the number of floors. This is in contrast to variable actions, where the load may be reduced for higher buildings. This simplified approach, with a typical value of γG = 1.35, has an impact on the estimated internal forces in columns and foundations, and has strong financial and material consumption implications (particularly detrimental for concrete slabs with larger significance of self-weight than alternative floor systems). For high-rise buildings, the construction sequence (only some floors propped during casting) becomes relevant for determining internal forces. In addition, the aleatoric component of some uncertainties (such as thickness of slabs) may partly compensate from floor to floor. Therefore, a constant PLF (independent of the number of floors) may lead to an uneven level of safety. In this paper, a semi-probabilistic analysis is performed, considering modelling errors and levels of correlation between floors. As a result, tailored values of the PLF are determined consistently with the level of refinement used for structural analysis. A case study of a concrete building with flat slabs is presented, showcasing the earlier findings and demonstrating that considering the evolutive construction sequence allows considering lower values of the PLF (γG ≈ 1.20). [ABSTRACT FROM AUTHOR]
Copyright of Magazine of Concrete Research is the property of Emerald Publishing Limited and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 192909393
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Partial load factor for self-weight of slabs in multiple-floor buildings.
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  Data: <searchLink fieldCode="DE" term="%22Concrete+slabs%22">Concrete slabs</searchLink><br /><searchLink fieldCode="DE" term="%22Load+factor+design%22">Load factor design</searchLink><br /><searchLink fieldCode="DE" term="%22Multipurpose+buildings%22">Multipurpose buildings</searchLink><br /><searchLink fieldCode="DE" term="%22Dead+loads+%28Mechanics%29%22">Dead loads (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Building+design+%26+construction%22">Building design & construction</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+analysis+%28Engineering%29%22">Structural analysis (Engineering)</searchLink>
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  Data: In building design, the partial load factor (PLF) for the self-weight of slabs is independent of the number of floors. This is in contrast to variable actions, where the load may be reduced for higher buildings. This simplified approach, with a typical value of γG = 1.35, has an impact on the estimated internal forces in columns and foundations, and has strong financial and material consumption implications (particularly detrimental for concrete slabs with larger significance of self-weight than alternative floor systems). For high-rise buildings, the construction sequence (only some floors propped during casting) becomes relevant for determining internal forces. In addition, the aleatoric component of some uncertainties (such as thickness of slabs) may partly compensate from floor to floor. Therefore, a constant PLF (independent of the number of floors) may lead to an uneven level of safety. In this paper, a semi-probabilistic analysis is performed, considering modelling errors and levels of correlation between floors. As a result, tailored values of the PLF are determined consistently with the level of refinement used for structural analysis. A case study of a concrete building with flat slabs is presented, showcasing the earlier findings and demonstrating that considering the evolutive construction sequence allows considering lower values of the PLF (γG ≈ 1.20). [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Magazine of Concrete Research is the property of Emerald Publishing Limited and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 18
        StartPage: 372
    Subjects:
      – SubjectFull: Concrete slabs
        Type: general
      – SubjectFull: Load factor design
        Type: general
      – SubjectFull: Multipurpose buildings
        Type: general
      – SubjectFull: Dead loads (Mechanics)
        Type: general
      – SubjectFull: Building design & construction
        Type: general
      – SubjectFull: Structural analysis (Engineering)
        Type: general
    Titles:
      – TitleFull: Partial load factor for self-weight of slabs in multiple-floor buildings.
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          Name:
            NameFull: Fernández Ruiz, Miguel
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            NameFull: Sagaseta, Juan
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          Name:
            NameFull: Viula Faria, Duarte
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            – D: 01
              M: 03
              Text: 2026
              Type: published
              Y: 2026
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              Value: 78
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              Value: 5/6
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            – TitleFull: Magazine of Concrete Research
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