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Deciphering engineering plans to get an estimate of concrete required

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  1. #1
    Apprentice (new member)
    Join Date
    Apr 2021
    Location
    Melbourne
    Posts
    8

    Default Deciphering engineering plans to get an estimate of concrete required

    Hi guys,

    I'm up to the stage of contacting concrete/excavation companies to get a quote for my slab for a shed build.

    Shed build thread for reference: https://www.renovateforum.com/f83/wh...-build-129772/

    I got the following engineering report for the slab 12M x 12M slab:

    bslcsg8.jpg

    I noted that the edge beams and internal beams need to be 300 wide by 800 deep min.

    The note of "all footings shall be founded 100mm into the natural silty clay. Here is the soil test to clarify:

    svjbxux.png


    My question is: Am I correct in thinking that all the footings/beams need to be 900 deep ? (minus the hatched beam going down 1500). I also noticed that saw cuts were not mentioned in the engineering plans.

    I calculated concrete at a total of 27.7m3 for the footings and 14.4m3 for the 100mm slab on top.

    I assume it would go something like:

    200mm cut to remove 'surface soil'
    300mm x 700 deep footings after cut
    fill/compact/box up etc
    vapour barrier/mesh etc
    pour

    It's been quite difficult to even get a quote in Melbourne as everyone is flat out due to covid demand I guess. Figured I'd try to make it a little easier for concreters to give me a quote if I can give them a little more information other than all the plans/engineering/soil tests etc.

    Cheers

  2. #2
    2K Club Member
    Join Date
    Apr 2012
    Location
    Jarrahdale
    Posts
    2,094

    Default

    Blocklayer is your best, unknown to you, mate..

    https://www.blocklayer.com/concrete/...alculator.aspx


    Make sure you donate...
    And.....your point is.....what exactly?

  3. #3
    Apprentice (new member)
    Join Date
    Apr 2021
    Location
    Melbourne
    Posts
    8

    Default

    I ended up drawing everything to scale and figuring it out that way. The website was quite buggy for me but I donated anyway for the idea

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