(19)
(11) EP 0 292 449 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.02.1989 Bulletin 1989/05

(43) Date of publication A2:
23.11.1988 Bulletin 1988/47

(21) Application number: 88850148.3

(22) Date of filing: 29.04.1988
(51) International Patent Classification (IPC)4: E04C 3/07, E04C 3/293, E04B 5/29
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 11.05.1987 SE 8701937

(71) Applicant: Thor, Jörgen
S-131 31 Nacka (SE)

(72) Inventor:
  • Thor, Jörgen
    S-131 31 Nacka (SE)

(74) Representative: Bjelkstam, Peter 
Radjursvägen 11
131 42 Nacka
131 42 Nacka (SE)


(56) References cited: : 
   
     
    Remarks:
    A request for correction has been filed pursuant to Rule 88 EPC. A decision on the request will be taken during the proceedings before the Examining Division (Guidelines for Examination in the EPO, A-V, 2.2).
     


    (54) Fire resistant steel beam coacting with concrete


    (57) The fire resistant, pre-stressed structural flooring carrying beam of steel includes two vertical webs (2) and a bearing plate (4) along the bottom of the beam extending out­side the webs (2) for bearing the floor structure, the upper side of which is above the upper side of the steel beam after finished concrete pouring. The webs (2) are those of two channels (1) fixed to the bearing plate (4) with their toes in opposing, mutual, spaced relationship. The upper flanges (5) of the channels are provided with projecting means (6, 6′) fixed at pre-determined mutual spacing along the beam. An open space between the channels (1) is thus pro­vided between the toes of the channels for filling with con­crete (10) when concrete is poured, such as to achieve static co-action between the steel beam and concrete via the means (6).







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