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Wideslab 100mm or 150mm hollowcore

  • 25-02-2021 1:48am
    #1
    Moggaman
    Registered Users Posts: 350 ✭✭


    Hi
    I recently got a price for hollowcore from a precast manufacturer. They quoted me for 150mm hollowcore. I noticed since that they do a wideslab 100mm option. Just wondering why this wasnt given as an option or is there limitations with it. I am struggling for height and the extra 50mm may be worth it?
    Thanks


Comments

  • #2
    DOCARCH
    Moderators, Home & Garden Moderators, Science, Health & Environment Moderators Posts: 18,149 Mod ✭✭✭✭DOCARCH


    What does your engineer say/recommend?


  • #3
    Moggaman
    Registered Users Posts: 350 ✭✭Moggaman


    DOCARCH wrote: »
    What does your engineer say/recommend?

    I have not discussed it with him yet.. I am researching prices and just wondered about the differences between the two products .
    I presume the wideslab means less loading on the walls but possibly less ability to build dense block work on the first floor?.


  • #4
    DOCARCH
    Moderators, Home & Garden Moderators, Science, Health & Environment Moderators Posts: 18,149 Mod ✭✭✭✭DOCARCH


    Too little information for anybody to comment and you are verging on a structural question (which is not permitted)!

    You should discuss with your engineer.


  • #5
    Metric Tensor
    Registered Users, Registered Users 2 Posts: 3,725 ✭✭✭Metric Tensor


    You need to get an engineer to give appropriate loadings to the slab manufacturer and they will then happily provide you with a price for any of their products that can support the relevant loads.

    If you are leaving it to the slab manufacturer to pull the loading values out of their own arse the quality and safety of the end result will depend on the quality of arse from which the figures are plucked!


  • #6
    Penn
    Registered Users, Registered Users 2 Posts: 34,197 ✭✭✭✭Penn


    Moggaman wrote: »
    I have not discussed it with him yet.. I am researching prices and just wondered about the differences between the two products .
    I presume the wideslab means less loading on the walls but possibly less ability to build dense block work on the first floor?.

    The thicknesses are based on the proposed loading. You need to give the suppliers the loading for them to give the appropriate thickness, design and specification.

    It's not a decision to make based on price. It's entirely dependent on the loading, which your engineer needs to provide to the supplier.


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  • #7
    Moggaman
    Registered Users Posts: 350 ✭✭Moggaman


    Penn wrote: »
    The thicknesses are based on the proposed loading. You need to give the suppliers the loading for them to give the appropriate thickness, design and specification.

    It's not a decision to make based on price. It's entirely dependent on the loading, which your engineer needs to provide to the supplier.

    Thanks . That what I was wondering ... the wideslab is a bespoke slab in reality then


  • #8
    Calahonda52
    Registered Users, Registered Users 2 Posts: 12,558 ✭✭✭✭Calahonda52


    Moggaman wrote: »
    Thanks . That what I was wondering ... the wide-slab is a bespoke slab in reality then

    No, it is not, it is a solid slab as opposed to a hollow-core slab, it is generally wider: 2.4 versus 1.2 for HC.

    As it is solid, it may actually be heavier than the HC, at 100 vs 150

    Its a design issue with pros and cons which are stated on many sites
    google PRE-STRESSED WIDESLAB FLOOR SLABS


    As for being worried about 50mm at this stage, the mind boggles

    “I can’t pay my staff or mortgage with instagram likes”.



  • #9
    Moggaman
    Registered Users Posts: 350 ✭✭Moggaman


    Calahonda52 wrote: »
    No, it is not, it is a solid slab as opposed to a hollow-core slab, it is generally wider: 2.4 versus 1.2 for HC.

    As it is solid, it may actually be heavier than the HC, at 100 vs 150

    Its a design issue with pros and cons which are stated on many sites
    google PRE-STRESSED WIDESLAB FLOOR SLABS


    As for being worried about 50mm at this stage, the mind boggles

    Ah I’m not worried! I was never changing from HC.. I was just wondering about the different situations they might be used in.. and in fairness I’ve gotten a through answer . Thanks


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