The Method Of Ibs And Conventional System Construction Essay

The Method Of Ibs And Conventional System mental synthesis Essay cranch productivity equation between structural grammatical reflection administrations showing that the way out of trades for each mental synthesis system was highly force back intensive beca practice session it consisted of cardinal major operations, namely the erection of scaffolding and formwork, installation of reverse, casting of cover and dismantling of scaffolding and formwork. On the other hand, the IBS prayd fewer whirl operations. For instance, the cast in situ tunnel form system did not require scaffolding to support the slab while the precast concrete system was pre-assembly in the factory, hence reducing on put labour input.crew coat comparison between structural building systemCrew coat comparison between structural building systems showing that the stodgy building system was signifi lottly different from the IBS. However, no signifi finisht difference was run aground between building sy stems in IBS. Hence, they were grouped into homogeneous subset . on average, IBS unavoidable a crew size of 22 people while the courtly building system required a crew size of 14 people. These crew sizes were further broken down into carpenter, precast panel erector, make form erector, bartender, concrete and crane operator. In term of percentage, the conventional building system require d 7% more than than size of the IBS. this was because the conventional building system required more aspect trades than the IBS.cycle magazine comparison between structural building systemCycle clipping comparison between structural building system show that the squiffy cycle time for completion of structural element of one house, the do construction duration for a project grass be predetermined. This fag be to evaluate the project extension of time submitted by the contractor. In terms of percentage, the conventional building system required 26%more than cast in-situ table form system, 41 % of cast in-situ half tunnel form system 53% of precast concrete2.4 Factor of choosing method of IBS and conventional systemAccording to the Warszawski (1999),that is the factor of comparison between IBS and conventional systemfactorIBSConventional system tone of voiceQuality-controlled and high aesrhetic and products through the process of controlled pre-fabrication and simplified installation.Factory production of pretended fixingss minimizes errors and imperfections, dissolventing in better quality products, better workmanship and superior finishes.An IBS components produces higher(prenominal) quality of components attainable through c arful selection of materials, use of advantages technology and strict quality assurance control.The initial bang-up investment for scope up a permanent factor is relatively experience. Plant, equipment, apt worker, precaution resources need to be acquired before production can be commenced. slight (cannot change the design flexibility as c omponents ordered was fixed in sizes)Materials may manage by semi-skill people.Uncertain weather can result in less-than expected construction.More (design can change flexibility, or can cast in-situ)Speed of construction timeFaster completion of construction projects referable to the usage of standardized prefabricated components and simplified installation processes.An industrialized building system allow for faster construction time because casting of precast element at factory and foundation work at the site can occur simultaneously. This provides earlier occupation of the building, thence reducing engagement payment or capital outlays.Generally, all building system requires lesser time to fabricated the building components, which may include time taken to fabricated, erect and dismantle formwork and to cure the concrete.Speed of construction is according to labour productivity and materials delivery to construction site.Time consuming where the process can be delay by weath er or scheduling conflict. tress of in-situ work requires the fixing and casting time, thus it is slow.Cost of constructionThe initial price of constructing the factory, casting beds and support machinery is usually expensive and can only be removed when undertaking bountiful project.The repetitive use of the formwork made up steel, aluminium, etc and scaffolding provides considerable cost savings.For large project, the initials capital investment in the building system can be amortized to a large extent, especially when the cost is given a wider spread. Prefabricattion capitalizes on a faster turnover, giving savings on overheads and other operational costs.greater control over manufacturing results dramatically reduces the chance of cost overruns.Need to habituate professional person to in charge.Construction cost increase referable to uncontrollable variables such as weather and scheduling conflict.If suitable materials ar choosing, cost of construction will decrease.Storage and equipment postFor the purpose of erection and assembling precast panels into their position, heavy crane is required especially for multi-storey building. It is and so important to incorporate this additional cost when adopting a prefabrication system.The prefabrication system relies severely on sophisticated plants, which have to be well coordinated and well-kept by skilled operators. Breakdown in any section would hold-up the constitutional production line.A large work area for the factory, tower cranes, trailers and retention space for the precast components are normally required. Most construction sites are congested are quite often unable to provide the large are required.Need to provide a storage for machinery.Bigger space is needed materials storageLesser large equipment at site a alike(p) tower crane, mobile crane and etc.Safety and cleanerConstruction is not affected by adverse weather condition because prefabricated component is done in a factory controlled envi ronment.Safer construction site due to reduction of site workers, materials and construction wastage.Construction operation is safer without large equipment like tower crane and etc. supermanIt is found that casting of large-panel system can reduce labour cost up to 30 percent. However, these cost savings are partially offset by the transportation costs. The transportation of large panels is also subject to the must taken into consideration when adopting a prefabrication system.All materials are deliver under small sizes and package form, thus all materials are easily transport to construction site.Labour secondary site worker required due to simplified construction methods.Prefabrication takes stern at a centralized factory, thus reducing labour demand at site. This is true especially when high degree of mechanization involved. due(p) to the higher degree of mechanization, professional person is needed. Skilled workers are replaced by plant machinery, tower crane and mobile loader s. utilize more of the workers is semi-skilled and skilled worker.High site workers required due to traditional construction methods.Using more of the workers is semi-skilled and skilled worker.(source Peng, 1986 Abdullah, 2003 Warszawski, 1999 Zaini, 2000 CIDB, 2003, 2005 Ingemar Lofgren Kent Gylltoft, 1996 Raymond, 2002)