Analisis Faktor Kerugian Waste Material Besi Beton Gedung Bertingkat

Abstract

Material as one of the components that has a contribution of 40-60% of the project cost in the research of Intan et al., 2005. Concrete is currently being studied because it is one of the five materials that affects 80% of material costs.. The purpose of this research is to examine how much the loss of iron concrete material waste and the ranking of the factors that influence it in multi-storey building projects. The research method is by conducting a questionnaire to contractors. The data collection process is carried out by distributing questionnaires in multi-storey building projects in Jakarta. Measuring the value of the questionnaire as many as 64 respondents used the Likert measurement technique. The sequence of data processing, first done by testing the validity and reliability testing. After that, these factors are ranked using the Relative Importance Index method. The result is a loss of Concrete Iron material waste of 7.5% and ratings that affect the loss of concrete are: not planning reinforcement bestat, complicated image detailing, cutting errors due to lack of understanding of work drawings / carelessness, lack of / unclear image information, use of wrong so that it needs to be replaced, the remaining cuts due to the process of use and a design change. Keywords: multi-storey building; reinforcing steel; waste material AbstrakMaterial sebagai salah satu komponen yang mempunyai kontribusi sebesar 40-60% dari biaya proyek di dalam penelitian Intan et al, 2005. Besi beton saat ini mau diteliti karena merupakan salah satu dari lima material mempengaruhi 80% biaya material. Tujuan penelitian ini meneliti berapa besar kerugian waste material besi beton dan peringkat faktor faktor yang mempengaruhinya pada proyek bangunan gedung bertingkat . Metode penelitian dengan melakukan kuesioner terhadap kontraktor. Proses pengumpulan data yang dilakukan adalah dengan menyebar kuesioner di proyek bangunan gedung bertingkat yang berada di Jakarta. Pengukuran nilai kuesioner sebanyak 64 responden digunakan teknik pengukuran Likert. Urutan pengolahan data, pertama dilakukan dengan uji validitas dan uji reliabilitas. Setelah itu faktor-faktor tersebut ditentukan peringkat dengan metode Relative Importance Index. Hasilnya adalah kerugian waste material Besi Beton sebesar 7,5 % dan peringkat yang mempengaruhi kerugian besi beton adalah:tidak merencanakan bestat penulangan, pendetailan gambar yang rumit, kesalahan pemotongan karena kurang memahami gambar kerja/kecerobohan,informasi gambar kurang/tidak jelas, penggunaan material yang salah sehingga perlu diganti, sisa pemotongan karena proses pemakaian dan adanya perubahan desain.

Case study of waste material 2 development projects

“…In every implementation of a building construction project, the appearance of residual material is unavoidable [6]. Waste in construction can be interpreted as a loss or loss of various resources, namely material, time (related to labor and equipment), and capital, which is caused by activities that require costs directly or indirectly but do not add value to the final product for service users [7]. Research conducted by Bossink and Brouwers (1996) in the Netherlands focuses on preventing the increase of waste materials in the future.…”