BouwData PB Coding

1
BouwData PBCoding
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
Available norms

• Program
• Design
• Execution
• Realization
• Usage

• NBN B06-002 surface content of buildings
• NBN B06-003 investment costs
• NBN B06-001 standard measure method
• NBN B06-004 exploitation costs
• NBN B06-005 data management usage

NEN 2630 NEN 2631 NEN 3699 NEN
2632 NEN 2633
B U I L D I N G P R O C E S S
NEN 2634 terms, definitions and rules with
reference to costs and quality aspects for
building projects
Building Declaration NEN 2630 ? NEN 2580
STABU system of building specifications for
residential and commercial building
9

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

10
Frame of notions TU Delft

• ? 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

11
Frame of notions TU Delft (2)

• 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

12

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

13
Theory

• Complex
• Building
• Cluster of elements
• Element
• Building fraction
• Component
• Activity
• Means (labour, materials, equipment)
• GBEC (General building execution cost)

? PoD, Chart 6, NEN 2634 ? PoD, Chart 7, NEN
2634 ? PoD, Chart 8, NEN 2634
functional description
Program / design
Cost index numbers of previous projects
Execution / realization
Prices with regard to this project
technical description

• STABU system of building specifications and
  conditions

• Separately defined as of chart 6, NEN 2634

14
Practice

• Complex
• Building
• Cluster of elements
• Element/building fraction
• Component composing parts of the building
  fraction/element
• Activity
• Means (labour, materials, equipment)

• ? 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

Data of BIM
Program / design
Cost index numbers of previous projects
Execution / realization
Prices with regard to this project

• means and formulas based on STABU system of
  building specifications and conditions

to be entered in a calculation program
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.080429)
• 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 BIMSplitting 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 functionsF.ex. Housing function, sport
  function, cell function,
• Defined spacesF.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 B06-002
• 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 ?
www.bouwdata.net