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THE VATHORST SAGA HOW NORMAL BUILDING CAN LEAD TO DISASTER

Course 7y900 health and comfort prof.dr. J.E.H.M. van Bronswijk. THE VATHORST SAGA HOW NORMAL BUILDING CAN LEAD TO DISASTER. Course 7y900 health and comfort.

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THE VATHORST SAGA HOW NORMAL BUILDING CAN LEAD TO DISASTER

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  1. Course 7y900 health and comfort prof.dr. J.E.H.M. van Bronswijk. THE VATHORST SAGA HOW NORMAL BUILDING CAN LEAD TO DISASTER How normal building can lead to disaster

  2. Course 7y900 health and comfort • Wim van den Bouwhuijsen • >40 years in building construction • lean construction management How normal building can lead to disaster

  3. Program first part 3 September lecture: 1 Vathorst general 2 health problems people living in Vathorst 3 explanation structure Zembla dvd about Vathorst 4 showing Zembla dvd 5 no evil intent 6 which are the technical problems 7 how can these technical problems come into being 8 are there economic or management reasons we let this happen 9 what can we do to eliminate this miscarry 10 conclusions OTB Delft 11 discussion 12 end of part one 3 September course Course 7y900 health and comfort How normal building can lead to disaster

  4. Course 7y900 health and comfort 1 Vathorst general A “vinex” district north-east of Amersfoort B situated between the motorways A1 at the south west side and A28 at the south east side and on a small river “de laak” C history of the area D background and concept E “a world of differences” F the intention is in 2014 11.000 houses and 135.000 m2 offices and 45 ha. company grounds G about 30.000 people in 2014 H finished in 2014 How normal building can lead to disaster

  5. Course 7y900 health and comfort 1 A “vinex” district north-east of Amersfoort A vinex location is a shortof “vierde nota ruimtelijke ordening extra” a note of the ministry of VROM of 1993. The note contains starting points for buildings etc of new building locations from 1 january 1995 and they concers massive housing developments How normal building can lead to disaster

  6. 1 B 1 Situation Course 7y900 health and comfort A 1 A 28 www.vathorst.com/overvathorst/kaart.asp?pageid=19 OBV How normal building can lead to disaster

  7. 1 B 2 Situation Course 7y900 health and comfort OBV How normal building can lead to disaster

  8. 1 B 3 Situation Course 7y900 health and comfort How normal building can lead to disaster

  9. Course 7y900 health and comfort 1 C history of the area The name vathorst comes of a centuries old farm named “De Vathorst” situated on the south side of the location. On the north-east is the little river “De Laak”. In former days the area belonged to Hoogland. The original structure of building were separated farms, spread on the sand ridges, because the earth was very wet and with peat. The laak was the border river between the dukes of Gelre and the bishop of Utrecht. How normal building can lead to disaster

  10. 1 D background and concept In april 1996 the city of Amersfoort made the decision to develop Vathorst. By the development of Vathorst the government invented the theme “A world of differences” the starting point is to make it a part of the town with an own identity on the base of differences. The differences are visible in the different work- and living places. The excisting landscape, canal town, urban. The business park is also for lowering the noise Course 7y900 health and comfort How normal building can lead to disaster

  11. Course 7y900 health and comfort E “a world of differences” As I told before the theme of Vathorst is; “a world of differences” This theme is worked out by the illustrious urban developers Ashok Bhalotra and Adriaan Geuze and established in the development “vision Vathorst 1998”. It is a varied architecture in the different parts. An impression you can form by the pictures later in this presentation. How normal building can lead to disaster

  12. Course 7y900 health and comfort “de Velden” How normal building can lead to disaster

  13. Course 7y900 health and comfort “het Lint” How normal building can lead to disaster

  14. Course 7y900 health and comfort “De laak” How normal building can lead to disaster

  15. Course 7y900 health and comfort “De Bron” How normal building can lead to disaster

  16. Course 7y900 health and comfort “Hooglanderveen” How normal building can lead to disaster

  17. Course 7y900 health and comfort 45 ha. Busines parc How normal building can lead to disaster

  18. Course 7y900 health and comfort 135.000m2 Offices How normal building can lead to disaster

  19. Course 7y900 health and comfort 2 health problems people living in Vathorst A -main problems bronchi, ophtalmia, headache, etc. B -2006 complaints of 36 people at the Area Health Autority C -medical check by the Area Health Autority D -no further real action E -start of a bodily injury lawyer F -Zembla program which came as a real bombshell G -media attention H -further studies also by and with our University How normal building can lead to disaster

  20. Course 7y900 health and comfort 2.A kind of complaints in relation with kind of ventilation GGD eemland How normal building can lead to disaster

  21. Course 7y900 health and comfort Aim of the research of the Area Health Authority: To investigate if there is a relation between health problems and ventilation Research issue (central question): What is the relation between health problems and the mechanical air ventilation (CMV and HRV) In winter 2006-2007 performed: 137 telephone interviews 100 inspections in the houses How normal building can lead to disaster

  22. Course 7y900 health and comfort -principle of Conventional Mechanical Ventilation(natural inlet and mechanical exhaust or CMV) Outdoor outlet valve Fan Indoor inlet valve Cooker hood How normal building can lead to disaster

  23. Course 7y900 health and comfort Principle of balanced flow Heat Recovery Ventilation(HRV) Indoor air outlet valve Indoor air inlet valve How normal building can lead to disaster

  24. Course 7y900 health and comfort Air valves Side-view Air inlet Air outlet Selection diagram Recommended work space How normal building can lead to disaster

  25. Course 7y900 health and comfort Research sub questions: 1 do the houses comply with legal rules 2 what is the quality of the indoor climate 3 is there a relation between indoor climate and ventilation system 4 is there a relation between indoor climate and health complaints 5 what are the options to prevent the complaints two systems: 1 with balanced ventilation (HRV) 2 without balanced ventilation (CMV) How normal building can lead to disaster

  26. Course 7y900 health and comfort 1 do the houses comply with the legal rules -The calculations were correct -reality *Houses with balanced ventilation, air-inlet living rooms 33% < 100% (heat recovery ventilation HRV) air-inlet sleeping rooms 6% <100% air-outlet 85% < 100% *not balanced-ventilation houses, air-inlet 100% = 100% Natural inlet and mechanical exhaust CMV) air outlet 72% < 100% How normal building can lead to disaster

  27. Course 7y900 health and comfort 2 what is the quality of the indoor climate The temperature and the relative humidity are correct Heat insulation is correct Too much noise of the balanced ventilation (see diagram) Dirty air filters Draught in some cases Too much CO2 in the houses (see diagram) Too much formaldehyde in the houses (see diagram) In the summer sometimes a too high temperature How normal building can lead to disaster

  28. Course 7y900 health and comfort Percentage of dwellings with a measured sound level > 30 dB(A) DWA How normal building can lead to disaster

  29. Course 7y900 health and comfort Percentage of the time with CO2-concentration smaller than 700 en 1000 ppm and higher than 1200 ppm (for livingroom and bedroom) DWA How normal building can lead to disaster

  30. Course 7y900 health and comfort Percentage of the dwellings with formaldehyde-concentration under a bordervalue How normal building can lead to disaster

  31. Course 7y900 health and comfort 3 is there a relation between indoor climate and ventilation system Ascertains is that there is a relation between the installations and the indoor climate. Specially by inconvenience of noise draughts, specially at night insufficient ventilation options to cool down the house at night insufficient fresh air This relation is stronger by the balanced ventilation system (HRV) How normal building can lead to disaster

  32. Course 7y900 health and comfort • 4 is there a relation between indoor climate and health complaints • Yes, the survey has confirmed this; especially by the balanced air ventilation systems • The observed complaints are: • Tired and watering eyes • Complaints of the nose • Hay fever • Sore throats and headache • Asthma • Tiredness • Maintenance and the use of the system is also an important factor How normal building can lead to disaster

  33. Course 7y900 health and comfort • 5 what are the possibilities to prevent the complaints • Better regulations for the system • Better maintenance • Awareness of intended use by the occupants • Technical adjustments How normal building can lead to disaster

  34. Course 7y900 health and comfort 3 explanation structure Zembla dvd about Vathorst Zembla dvd; ill by your own house Divided in 4 parts 1 many people have problems with their bronchi 2 the Area Health Authority found a significant relationship between balance ventilation and health problems, and the ministery of housing ignored important reports 3 building corporation doesn’t know how many people in Vathorst are ill 4 the government established the energy label, but a health label was not considered of importance How normal building can lead to disaster

  35. Course 7y900 health and comfort 4 showing Zembla dvd http://zembla.vara.nl/Voorpagina.1975.0.html?&tx_ttnews%5Btt_news%5D=5397&tx_ttnews%5BbackPid%5D=1974&cHash= Hyperlink cd: How normal building can lead to disaster

  36. Course 7y900 health and comfort one of the many publications after the Zembla broadcast BD How normal building can lead to disaster

  37. Course 7y900 health and comfort • 5 no evil intent • -I am convinced it is no evil intent of one the involved contracting parties, but a concurrence of circumstances caused by the way business is done • we are (were) too insufficiently aware of the specifications for a good ventilation system in the places people stay • that is why in spite of the problems of Vathorst and perhaps other projects, we must be glad that we now have discovered this consequence of bad ventilation so we can change it for the future How normal building can lead to disaster

  38. Course 7y900 health and comfort 6 which are the technical problems A the most important reason is a lack of fresh air caused by: capacity of the fan, the machine, filters, inhabitants, tubes, air valves, pollution and wrong installation. (see drawing) B noise of the installation (building regulations < 30 dB(a) C insufficient cooling in the warm periods D adjustment of the air installation E extra complaints after a period; microbial grow and mite development F outside air quality How normal building can lead to disaster

  39. Course 7y900 health and comfort Place of the air valves How normal building can lead to disaster

  40. Course 7y900 health and comfort How normal building can lead to disaster

  41. Course 7y900 health and comfort How normal building can lead to disaster

  42. Course 7y900 health and comfort • 7 how can these technical problems come into being • -the safety margin in the calculations is insufficient • -unfamiliarity with the technology on the site, the person who fits the tubes does not know s/he is doing the things s/he does • -the options for build in, space for the tubes (see photo before) • -the ease and responsibility of the workers on the site • -use the right materials especially filters • -use of cooker hood in ventilation installation • -instruction of the inhabitants • -cleaning and maintenance of the installation • -use of ‘unmentioned’ spaces in the right way How normal building can lead to disaster

  43. Course 7y900 health and comfort 7.1 -there is insufficient safety margin in the calculations Moreover there are often no or bad design calculations (VROM 35%) After 5 years and bad maintenance pollution gives a reduction in working of 20% in position 1 and 50% in position 2 How normal building can lead to disaster

  44. Course 7y900 health and comfort 8 are there economic or management reasons why we let this happen (failure 15-20% of the total amount of investments in building costs) A - safety margin too small B –price mechanism (cheapest in the beginning, instead of in the whole lifecycle) C -forms of contracts (existing contracts do not fulfill) D –customer value (depends of the project but can we determine it at the beginning of the project, years of preparation and the occupants are mostly unknown at the beginning) and Lean Construction Management How normal building can lead to disaster

  45. Course 7y900 health and comfort 8 A - safety margin As long as we do not know all the data, an option is over-dimension instead the situation nowadays This is a new phenomenon where the professional organization and the government has to say something about, you now cannot lay this responsibility by the performers. When there is a little flaw in the system you do not reach the asked values with all bad consequences How normal building can lead to disaster

  46. Course 7y900 health and comfort 8 B –price mechanism (cheapest in the beginning instead of in the whole lifecycle) In the Netherlands we are “price buyers” instead of looking to the whole life cycle. It is important not to look at the investment only, but to make an estimate including maintenance, comfort, health, and options for adapting when new technologies become available The way of thinking must change. For years and years we are talking about this subject, but it seems it is the only thinking, not doing How normal building can lead to disaster

  47. 8 C -forms of contracts (excisting contracts do not fulfill) If you make contracts included maintenance you may guarantee a better product because the contractor certainly thinks in the way as 8 C, calculation of the whole life cycle The contracts we are talking about are Design. Build. Operate. Transfer Design. Build. Transfer. Maintain Course 7y900 health and comfort How normal building can lead to disaster

  48. 8 D – customer value and Lean Construction Management The philosophy of Lean is first define what is important for the customer than start the process of continue optimalisation to raise the customer value and to minimize waste (in the widest meaning of the word) In my vision, this philosophy is the best to reach the best quality for the best price. Every discipline works together and not only for their selves. That is why you have to threat your partners as your own employes and opposite Only use new technology when you know all inns and outs about. There are more rules to follow when you want to go lean, but these are the most important in this case. Other key words are –VALUE – VALUE STREAM – FLOW – PULL - PERFECTION Course 7y900 health and comfort How normal building can lead to disaster

  49. Course 7y900 health and comfort The way of (NO)organizing R vd Vlies How normal building can lead to disaster

  50. Course 7y900 health and comfort 9 what can we do to eliminate this miscarry We have to practice what we mentioned under point 8. namely: define the customer value and start lean(14 principles of Liker) Some of this principles are: 5 STOP as soon there is a quality problem 6 Standardize activities 7 Use visible control 8 Use only reliable technology implement new technics only when you have fully tested them How normal building can lead to disaster

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