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How should I mount heavy pendants on joists or trusses?

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    Default How should I mount heavy pendants on joists or trusses?

    We are building a new house, double story, and we wish to mount some large (and unfortunately, heavy) pendants in a few rooms downstairs and upstairs.
    I have attached pictures of the lights in question, and also joist and roof truss diagrams. Considering the weight, what modifications should I make to the joists/trusses to allow extra weight?

    The lights are as follows:
    1) Rectangular pendant, 100x200cm, total weight 110kg.
    Location: DINING
    Support: Steel beam (luckily)
    Joist spacing: 450mm

    2) Round pendant, 120cm, total weight 75kg.
    Location: FAMILY
    Support: Joists, spacing 450mm
    Light frame spacing: 100cm hole end to end, 40cm hole to hole (middle)

    3) Rectangular pendant, 180x34cm, total weight 90kg.
    Location: KITCHEN
    Support: Joists, spacing 450mm
    Light frame spacing: Two chains support. Chain mounts

    4) Round pendant 80cm, total weight 40kg.
    Location: LEISURE
    Support: Roof trusses, spacing 600mm
    Light frame spacing: 455mm hole to hole

    5) Round pendant, 120cm, total weight 75kg.
    Location: LEISURE (undecided on size)
    Support: Roof trusses, spacing 600mm
    Light frame spacing: 455mm hole to hole

    I had some previous suggestions (see pics) about adding timber between joists, but roof trusses are not the same).

    What extra requirements do I need to mount these, to be sure they will not fall down?
    Attached Thumbnails Attached Thumbnails first-floor-floor-layout-lights.jpg   first-floor-joists-lights.jpg   roof-truss-light-locations-lights.jpg   roof-truss-rooms-lights.jpg   round-details.jpg  

    kitchen-chain-mounts-copy.jpg   kitchen-light-06.jpg   round-80cm-copy.jpg   round-120cm-copy.jpg   dining-light-mounting.jpg  

    dining-light.jpg   dining-light-steel.jpg   screenshot_20220129-163444_chrome.jpg   screenshot_20220130-024149_chrome.jpg  

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