(19)
(11) EP 1 837 451 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.06.2008 Bulletin 2008/23

(43) Date of publication A2:
26.09.2007 Bulletin 2007/39

(21) Application number: 07250686.8

(22) Date of filing: 20.02.2007
(51) International Patent Classification (IPC): 
E04C 3/292(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 23.03.2006 GB 0605819

(71) Applicant: GANG-NAIL SYSTEMS LIMITED
Aldershot, Hampshire GU12 4XG (GB)

(72) Inventor:
  • Baron, Paul
    Surrey GU10 4 BT (GB)

(74) Representative: Roberts, David Leslie et al
Nash Matthews 90-92 Regent Street
Cambridge CB2 1DP
Cambridge CB2 1DP (GB)

   


(54) Joists


(57) A joist (7) has a metal member providing a web (10) and having an upper surface (11) bonded by adhesive to an upper timber chord (15) and a lower surface (12) bonded by adhesive to a lower timber chord (16). The inherent stiffness of the metal web, and the location of the upper and lower chords at distances spaced from the neutral axis of the joist, imparts a substantial resistance to bending.







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