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BouwData PB ® Coding.  Choke points  Available norms  Lexicon as a reference frame  Theory vs. practice  Coding BouwData PB ®

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Presentation on theme: "BouwData PB ® Coding.  Choke points  Available norms  Lexicon as a reference frame  Theory vs. practice  Coding BouwData PB ®"— Presentation transcript:

1 BouwData PB ® Coding

2  Choke points  Available norms  Lexicon as a reference frame  Theory vs. practice  Coding BouwData PB ®

3  Choke points  Available norms  Lexicon as a reference frame  Theory vs. practice  Coding BouwData PB ®

4 Choke point 1  Each building partner has a different need of knowledge  Investor: the price is devided in the underground and the aboveground building cost  Designer: price of for example a window, all accompanying activities inclusive  Building supervisor: price of for example a m² formwork  Each building partner has a preference for a different top-down structure  Price list in a tree diagram is not sufficient

5 Choke point 2  Not a univocal work system. In each project with new building partners:  A different classification of building specifications  Different measure codes  Different states of progress  Waste of time & communication issues  An advancement of knowledge for the entire project is impossible

6 Choke point 3  No transparency with regard to the building cost. Following costs are “judiciously” spread among the production costs:  The cost of the layout of the construction site  The cost of the preliminary works  The cost of the project follow-up  The knowledge of these costs are confined to the building supervisor  No concrete price comparison are possible

7  Choke points  Available norms  Lexicon as a reference frame  Theory vs. practice  Coding BouwData PB ®

8 Program Design Execution Realization Usage NBN B surface & content of buildings NBN B investment costs NBN B standard measure method NBN B exploitation costs NBN B data management & usage = NEN 2630 = NEN 2631 NEN 3699 = NEN 2632 = NEN 2633 NEN 2634 terms, definitions and rules with reference to costs and quality aspects for building projects STABU: system of building specifications for residential and commercial building Building Declaration : NEN 2630  NEN 2580 Available norms BUILDINGPROCESSBUILDINGPROCESS

9  Choke points  Available norms  Lexicon as a reference frame  Theory vs. practice  Coding BouwData PB ®

10  As a result of the Building Declaration  Complex = a compilation of several buildings that belong together  Building = a complete compilation of functional/fysical objects that are necessary to meet a demand of accomodation  Cluster of elements = a group of elements with certain characteristics that are interconnected F.ex. Foundations  Element = a functional object with a specific function, defined without mentioning the kind of the technical solution or the construction method F.ex. Floors on groundwork – weight 3 tons/m², planeness class 5mm/2m  Building fraction = a fysical object with a specific performance, defined precisely by mentioning the kind of the technical solution and the construction method F.ex. Floors on groundwork - 20cm concrete C25/30 with 25kg/m³ steel fibres on a PE-foil 0,2mm and on a substratum of 5cm soil and 30cm rubble Frame of notions TU Delft

11  Component = a fysical object with a specific performance that is part of a building fraction, composed of building delivery products, with the use of labour and materials F.ex. Ground stabilization of the building excavation  Activity = the process of the handling of building products with the use of labour and materials for the realization of components F.ex. Formwork  Means = generic data carrier for labour, materials and equipment F.ex. Delivery PE-foil 0,2mm  GBEC (General building execution cost) = costs of labour and equipment, that are necessary for the realization of a building, insofar the costs are not linked to means that remain on the building site once the building is completed Frame of notions TU Delft (2)

12  Choke points  Available norms  Lexicon as a reference frame  Theory vs. practice  Coding BouwData PB ®

13  Complex  Building  Cluster of elements  Element  Building fraction  Component  Activity  Means (labour, materials, equipment)  GBEC (General building execution cost) Program / design Execution / realization Cost index numbers of previous projects Prices with regard to this project = functional description = technical description  PoD, Chart 6, NEN 2634  PoD, Chart 7, NEN 2634  PoD, Chart 8, NEN 2634  Separately defined as of chart 6, NEN 2634  STABU system of building specifications and conditions Theory

14  Complex  Building  Cluster of elements  Element/building fraction  Component = composing parts of the building fraction/element  Activity  Means (labour, materials, equipment) Program / design Execution / realization Cost index numbers of previous projects Prices with regard to this project Data of BIM …  PoD, Chart 6, NEN 2634  PoD, Chart 7, NEN 2634  PoD, Chart 8, NEN 2634  PoD, Chart 1 of BB-SfB registered in chart 8, NEN 2634  means and formulas based on STABU system of building specifications and conditions … to be entered in a calculation program Practice

15  Choke points  Available norms  Lexicon as a reference frame  Theory vs. practice  Coding BouwData PB ®

16 Development BouwData PB ®  On C3A-net with the support of IWT (nr )  Concept & basisc lists are free of charge  Monitored by 350 building professionals

17 System of agreements BouwData PB ®  Administration groupware  Phasing of the building process  Structure of the performance building specifications and conditions specific for a project  Structure of the technical building specifications and conditions specific for a project  Variety of costs  Quantities and units  User functions and space designations  Cost centres and accompanying ratios

18 Performance specifications vs. technical specifications  Use of BIM Splitting up “object” and “material”:  Object = focused on design  NEN 2634, chart 1 of BB-SfB  Material = focused on execution  STABU (instead of chart 2 & 3 of BB-SfB)  Conversion instead of folding out the same tree diagram!  cost centres respect property developer

19 Performance specifications vs. technical specifications (2)

20 Quantities and units  SI-units  Extension with agreements in the benefit of cost related units F.ex. m² - d = a cost / m² / day can be used in f.ex. taxes on the installation of the construction site on public property F.ex. t - km = a cost / ton / kilometre can be used in f.ex. transport of soil

21 Variety of costs  Cost index numbers for several building phases  Means (MLES)*  General costs (GC)  General building execution costs (GBEC)  Profit  Risk  Approximate estimates * (MLES) Materials, Labour, Equipment and Subcontracting

22 User functions and space designations  In accordance with the Dutch Building Declaration (instead of chart 0 of the BB-SfB)  User functions F.ex. Housing function, sport function, cell function, …  Defined spaces F.ex. lavatory, heating system room, traffic space, …  Definition usable surface

23 User functions and space designations (2)

24 Cost centres and accompanying ratios  Coding based on  NBN B  Chart 1 BB-SfB  Building Declaration  Addition (English abbreviation)  Geometry of the building  Finishing of spaces for the purpose of user functions

25 Cost centres and accompanying ratios (2)

26 Cost centres and accompanying ratios (3)

27 More information about BouwData PB ® ?


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