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IFC setting format and rounding precision

Bogdan Majcherczyk
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We deliver to our customer reinforcement IFC models. Customer based on the model preparing bill of quantities using some dedicated software. The point that is by default all components of Pset_ProStructures_Rebar_Properties and Pset_ProStructures_RebarAssembly_Properties are written to IFC file as a strings, and the customer software reading reinforcement weight (mass) expects numbers.

I have change weight mapping inside IfcElementAssembly.att and IfcReinforcingBar.att files from IfcLabel to IfcMassMeasure. Finally IFC file contains numbers (double) with unit (kg). But values are given rounded to kilograms. Is there any way to set custom rounding precision for IFC weight attribute? If so how to do it?

By the way, is the Mapping Options available within ProStructure, the way it is implemented if Open Building Designer? Or the manual edit of *.att file is the only way to control IFC file content?

Regards,
Bogdan

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    Hello Sandip,
     
    There is no big issue when we consider reinforcement sets with many bars. But sometimes for “difficult” shapes we use small diameter single bars reinforcement, and then when you compare reinforcement weight generated with Schedule Generator and the weight taken from IFC file the difference is “noticeable”.
     
    Of course kilograms are not the matter when we are talking about tons, but this “small” discrepancies are confusing. The question form customer is where did we go wrong and what values are correct – these given in bending schedule or those taken off the IFC file?
     
    So we are explaining the background instead of giving “the same” numbers😊.
    Regards
     
    Bogdan Majcherczyk
    Designer
    SWECO Polska Ltd.

    Mobile +48 (0)730270260
    bogdan.majcherczyk@sweco.pl
    Sweco Engineering sp. z o.o.
    Wielicka 30
    PL-30-552 Kraków
    Telephone +48 12 411 21 02
    Fax +48 12 411 12 65
    www.sweco.pl
     


    Follow Sweco on social media: LinkedIn

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  • 0 Offline
    Hello Sandip,
     
    There is no big issue when we consider reinforcement sets with many bars. But sometimes for “difficult” shapes we use small diameter single bars reinforcement, and then when you compare reinforcement weight generated with Schedule Generator and the weight taken from IFC file the difference is “noticeable”.
     
    Of course kilograms are not the matter when we are talking about tons, but this “small” discrepancies are confusing. The question form customer is where did we go wrong and what values are correct – these given in bending schedule or those taken off the IFC file?
     
    So we are explaining the background instead of giving “the same” numbers😊.
    Regards
     
    Bogdan Majcherczyk
    Designer
    SWECO Polska Ltd.

    Mobile +48 (0)730270260
    bogdan.majcherczyk@sweco.pl
    Sweco Engineering sp. z o.o.
    Wielicka 30
    PL-30-552 Kraków
    Telephone +48 12 411 21 02
    Fax +48 12 411 12 65
    www.sweco.pl
     


    Follow Sweco on social media: LinkedIn

    For more information on how Sweco processes your personal data, please read     here.

     
     
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