Adopting open system in IBS is one of the pillars IBS roadmap and still considered by CIDB, as the way forward to create value in IBS, establish competitive market for IBS components and reduce monopoly of so called big boys in IBS. Open system is where contractors (or rather designers) involved in IBS can choose the components from several manufactures. However, due to ramification and issues in jointing and coordination, the close system is still a norm in Malaysia where the contractors using only one system.
Considering open system as the way of implementing IBS, I can only thing one particular IBS project, Putrajaya Precint 17. This is because, its the only IBS building in Malaysia constructed using open system concept (other than IBS showhauses in CIDB, correct me if im wrong). Structure elements, slab, stairs, walls, is procured using open tender, and purchased to different manufactures.
Of course, they faced numerous of problems; joints, coordination etc., but congratulation to UEM for successfully construct and handing over this project to client in the middle of last year.
The following is the case study report, compiled during my site visit back in 2009. I would like to express my deepest appreciation and special thanks to my good friends Mr. Hatta Kahar and Mr. Isrin Itam for helping me and sharing thier experience. Further information can be obtained in Mr. Hatta's website at http://ibsrevolution.blogspot.com/
Please check in particular the MS Power Point in Mr. Hatta's blog.
Date: 23 October 2009
Time: 10.00am - 12.00noon
Vanue: Putrajaya Precint 17
Summary of the case study.
1. UEM P17 - Design and Build - 548 unit
2. 2004, direct negotiation, initial design is conventional and change to IBS (80% - Target IBS Score)
3. Early involvement of design and manufacturing team is crucial. Get input and information from Eeastrn Pretec (manufacture) to discuss on manufacturability and constructability
4. UEM Builders is focus on construction management but actively involve in managing value trough the supply chain and coordinationg design, manufacturing and construction
5. Pre-planning is important including systematic planning on logistic issue
6. All the logistic and transporatation of components from factory to site will follow just in time principal whenever possible
7. Difficulties in converting conventional design to IBS due to design approval by authorities
8. The number of workers / sub-contractors can be reduced
9. Difficulties in tracking the components, use numbering manually put at each component. Need for better tracking system RFID and also better IT tools BIM etc to manage and tracking the progress of the projects
10. Selection of sub-contractors and manufaturer are based on pre-qualifiqation creteria
11. Still use wet join, a lot of rework at site. Dry join will expedited work at site. Lesson learned
12. Machinery must be good and aplenty. This will effect site progress (panel installation)
13. Use precast panel, wall, slab (hollow core) - IBS Score 80
14. Working in planned developement area like Putrajaya - understading on building regulation and authorities is vital