Studi Kasus Waste Material Proses Fabrikasi Struktur Baja di Perusahaan EPC (Engineering, Procurement, Construction)

Abstrak Sisa material atau waste merupakan sisa dari material yang tidak dapat dipergunakan kembali. Sering tidak sesuainya perencanaan estimasi waste dengan kenyataan waste di lapangan, menjadi latar belakang penelitian ini. Penelitan ini terfokus pada empat jenis bangunan baja antara lain gudang, bandara, tower, jembatan dengan masing-masing menggambarkan jenis profil wf, pipa, siku, plat. Metode penelitian yaitu dengan menghitung persentase waste dengan cara menghitung selisih berat bruto dikurangi berat netto yang kemudian dibagi berat bruto. Berat bruto diperoleh dari perhitungan kebutuhan material berdasarkan gambar struktur, sedangkan berat netto diperoleh dari hasil permodelan 3D. Pengujian korelasi untuk mengetahui faktor penyebab waste. Hasil pengolahan data adalah waste tower dengan profil siku sebesar 5.71 %, gudang dengan profil wf sebesar 9.36 %, bandara dengan profil pipa sebesar 13.85 %, dan jembatan dengan profil plat sebesar 19.08%. Faktor penyebab waste adalah jenis profil dan dimensi bangunan yang meliputi tinggi bangunan, panjang bangunan, bentang bangunan. Abstract Waste material is residual of the material that can't be used anymore. Often planning estimates of waste is not same with the actual waste on site become the creation of ideas in this study regarding waste steel profile. In previous studies have focused on natural materials making can be done in the field or cast in situ. This research focused on four types of steel buildings include warehouses, airports, towers, bridges with each describing the type of profile wf, pipe, angle bar, plate. The research method is to calculate the percentage of waste by calculating the difference between the gross weight minus the net weight is then divided by gross weight. The gross weight is obtained from the calculation of material needs by drawing the structure, while the net weight obtained from the 3D modeling. The percentage of waste is then analyzed regression to obtain the factors causing waste. The result of data processing shows that the smallest percentage of waste is a type of tower building with angled profile by 5.71%, warehouse with wf profile for 9,36%, the airport building with pipe profile of 13.85%, building bridges with the profile plate by 19,08%. Causing factor of waste is type of profile and building dimension consists of height, wide, and length of building.