TECHNOLOGY OF IBS BFP40603 – INDUSTRIALISED BUILDING SYSTEMS (IBS)
CONTENT •
Types of IBS •
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Precast Concrete Framing, Panel and Box System
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Formwork Systems
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Prefabricated Steel Framing Systems
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Prefabricated Timber Framing Systems
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Blockwork Systems
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Innovative
Facilities and infrastructures
CONTENT •
Types of IBS •
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Precast Concrete Framing, Panel and Box System
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Formwork Systems
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Prefabricated Steel Framing Systems
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Prefabricated Timber Framing Systems
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Blockwork Systems
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Innovative
Facilities and infrastructures
Learning outcome: •
Identify and understand the components type of IBS such as Precast Precast Concrete Framing, Framing, Panel and Box Box system; system; Formwork System, System, Steel Framing System; Prefabricated Prefabricated Timber Framing System; Blockwork System and Innovative. Innovative.
INTRODUCTION •
Earliest classifications of IBS were a) frame or post and beam system; b) panel system; and c) box system (Junid, 1986).
Column and beam - main structure member (support all the building weight) Walls - light and easy to install Concrete panels - flooring
Loads are distributed through large floor and wall panels where walls support the building weight. Applicable to buildings which require large number of walls-apartment house, hotel and hospital. Not suitable to buildings with large spans or many stories
Three-dimensional modules or boxes for fabrication of habitable units that are capable of withstanding load from various directions due to their internal stability
INTRODUCTION •
Classification of IBS developed by the CIDB:
IBS Types
Precast concrete framing, panel and box system
Formwork system
Prefabricated steel framing system
Blockwork system
Innovative product system
Prefabricated timber framing system
1) Precast concrete framing, panel and box system The most common group of IBS products is the pre-cast concrete elements, such as, pre-cast concrete column, beams, slabs, walls, “3-D” components (examples, balconies, staircases, toilets, lift chamber, refuse chambers), lightweight pre-cast concrete, as well as permanent concrete formwork
Preparing M&E for precast wall panel
2) Formwork system •
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Considered as one of the “low-level” or the “least prefabricated” IBS, as they generally involve site casting
High quality finishes, fast construction with less site labour and material requirement. These include tunnel forms, tilt-up systems, beams and columns moulding forms, and permanent steel formwork (metal decks). Onsite fabrication - the walls and complete building are cast on-site, using specially designed and reusable formwork moulds. The formwork may be made from plastic, steel etc. The claim to prefabrication lies in the manufacture of the moulds, into which the concrete is poured.
3) Prefabricated steel framing system Commonly used with pre-cast concrete slabs, steels column and beams, steel framing systems have always been the popular choice and used extensively in the fast-track construction of skyscrapers.
Recent development in this type of IBS includes the increased usage of light steel trusses consisting of costeffective profiled cold-formed channels and steel portal frame systems as alternatives to the heavier traditional hot-rolled sections.
Video: Ajiya IBS Green (Enduroframe)
4) Prefabricated timber framing system Products - timber building frames and timber roof trusses. While the latter are more popular, timber building frame systems also have its own niche market: offering interesting design from simple dwelling units to buildings requiring high aesthetical values such as chalets for resorts
5) Blockwork system •
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Interlocking concrete masonry units (CMU) and lightweight concrete blocks. Simplify the traditional brick-laying tasks
Usually, the block is designed as a load bearing wall system, in which the bricklaying work does not require mortar (dry system), and the component can easily be installed like a ‘Lego’ system.
Proven Holdings
To strengthen the block to allow for load bearing, reinforcing steel was put inside the cavity and filled with concrete.
6) Innovative This category refers to the various pre-fabricated materials that have entered the market, which include gypsum, wood wool, polymer, fibreglass, glass and aluminium-based IBS components.
FB: IBS Concrete panels Sdn Bhd
IBS FACILITIES AND INFRASTUCTURE Typical Industrialised Building System (IBS) Construction Process (Adapted from Hamid, 2010)
Production facility Equipment at site
Transportation
1) Producing the components within controlled environment whether offsite or on-site; 2)Delivery of component to the construction site or workplace; and 3) Installation of components and ancillary site works.
1) Production facility •
Plant -
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Equipment
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Skilled worker
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Management resources
>> initial capital investment is relatively expensive - such huge investment can only be breakeven if there is sufficiently high demand for the products. On the other hand, a temporary casting yard or factory can be established at the project site in order to minimized the transportation costs (Peng, 1986)
Batching plant
Overhead crane
Precast concrete mould & casting bed
Precast concrete fabrication yard
Skilled worker
Precast concrete fabrication yard
Precast concrete fabrication yard
QA/QC
Forklift
Storage facility
Blockwork manufacturing
Blockwork manufacturing (automatic)
Prefabricated steel framing factory
Prefabricated timber framing factory
2) Transportation •
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Large truck, lorry It is found that casting a large panel system can reduce labour cost up to 30 percent. However, these cost savings are partly offset by the transportation costs. The transportation of large panels is also subject to the road department and relevant authorities (Peng, 1986)
3) Equipment at site •
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For the purpose of erecting and assembling pre-cast panel into their position, heavy crane is required especially for multi-story building. Crane, other equipment and tool
