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All Journal Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) SAINSTEK Jurnal Ragam Pengabdian
Enda, Dedi Enda
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ANALYSIS OF CONCRETE AND REINFORCEMENT QUANTITY TAKE-OFF OF BRIDGE APPROACH STRUCTURES USING AUTODESK REVIT 2024 AND CONVENTIONAL METHODS Rubiasih Afrida; Dedi Enda
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 6 No. 4 (2026): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.20694446

Abstract

The development of Building Information Modeling (BIM) has accelerated the digitalization of construction planning and management processes, including Quantity Take Off (QTO) calculations that require high speed and accuracy. However, the estimation of concrete and reinforcement quantities for bridge approach structures is still commonly performed using conventional methods, which are prone to calculation errors and require relatively more time. In addition, studies investigating the application of BIM to bridge approach structures with curved geometries remain limited. This study aims to analyze and compare the Quantity Take Off results of concrete and reinforcement obtained using Autodesk Revit 2024 and conventional methods for the bridge approach structures of Sei Kuala and Sei Akar Bridges on the Bagan Jaya–Tembilahan road section. A comparative quantitative research method was employed by developing a three-dimensional model based on project design data and extracting quantity information using the Schedule/Quantity feature in Autodesk Revit 2024. The accuracy of the calculated quantities was evaluated using the Average Error and Root Mean Square Error (RMSE) parameters. The results indicate that Autodesk Revit 2024 is capable of producing quantity estimates that closely correspond to those obtained through conventional methods, with an Average Error of 2.619% for concrete and 5.920% for reinforcement, and RMSE values of 0.473 m³ and 0.656 m³, respectively. The largest deviation was observed in the deck slab reinforcement due to the curved geometry of the bridge approach, which caused Autodesk Revit to calculate the length of each reinforcing bar individually. Overall, the findings demonstrate that Autodesk Revit 2024 can serve as an effective and reliable alternative for performing Quantity Take Off on bridge approach structures with complex geometries.
QUANTITY TAKE-OFF COMPARISON OF CONVENTIONAL AND BIM-BASED CUBICOST METHODS: A CASE STUDY OF SMPN 2 MEGALUH M. Bayu Fernando Syahfikri; Dedi Enda; Roma Dearni
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 6 No. 5 (2026): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.21704716

Abstract

Quantity Take-Off (QTO) is an essential process in construction projects as it directly influences cost estimation and project planning. Conventional quantity calculation methods often require more time and are prone to errors due to the manual interpretation of construction drawings. This study aims to compare the Quantity Take-Off results obtained using the conventional method and the Building Information Modeling (BIM) approach through Cubicost software in the construction project of SMPN 2 Megaluh. The BIM model was developed based on architectural, structural, and mechanical-electrical drawings using the Take-off for Architecture and Structure (TAS), Take-off for Reinforcement Bar (TRB), and Take-off for Mechanical, Electrical, and Plumbing (TME) modules. The quantities generated by Cubicost were then compared with those obtained through conventional calculations. The results indicate that most work categories produced relatively small deviations, demonstrating a good level of agreement between the two methods. The largest deviations in the TAS module were observed in ceiling works (15.93%) and earthworks (15.71%), while several work categories produced identical results. Quantity differences in the TRB and TME modules were generally influenced by modeling details, drawing interpretation, and calculation procedures. Overall, the BIM-based approach using Cubicost proved to be more efficient, integrated, and consistent in generating Quantity Take-Off data, making it a reliable alternative to conventional methods for construction quantity estimation.
Pengaruh Perawatan Air Tawar Dan Air Laut Pada Penggunaan Fly ash Sebagai Subtitusi Semen Dan Bottom Ash Sebagai Pengganti Sebagian Pasir Pada Beton Mutu 20 Mpa Roma Dearni Roma; Dedi Enda; Muhamad Akbar
SAINSTEK Vol. 13 No. 2 (2025)
Publisher : Sekolah Tinggi Teknologi Pekanbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35583/js.v13i2.391

Abstract

Pembangunan infrastruktur yang pesat memacu kebutuhan akan prasarana transportasi yang berkelanjutan, serta inovasi dalam rekayasa struktur, khususnya pada teknologi bahan konstruksi. Beton, sebagai bahan bangunan utama, membutuhkan inovasi untuk meningkatkan kekuatan dan kinerjanya, salah satunya dengan penggunaan bahan tambahan. Penelitian ini bertujuan untuk mengevaluasi pemanfaatan limbah pembakaran batubara, yaitu fly ash dan Bottom ash, dalam campuran beton mutu 20 MPa. Fly ash digunakan sebagai subtitusi semen, sementara Bottom ash menggantikan sebagian agregat halus. Penggunaan bahan limbah ini bertujuan untuk mengurangi biaya produksi beton dan dampak lingkungan dari limbah batubara. Hasil penelitian menunjukkan bahwa penggunaan Bottom ash dan fly ash dapat mempengaruhi kuat tekan beton. Pada umur 7 hingga 28 hari, kuat tekan beton cenderung menurun, namun meningkat pada umur 56 hari, baik untuk perawatan dalam air tawar maupun air laut. Pengujian kuat tekan dilakukan dengan menggunakan alat uji tekan dan benda uji berbentuk kubus atau silinder pada umur 7, 28, dan 56 hari. Hasil uji kuat tekan pada campuran beton dengan komposisi 30% Bottom ash menunjukkan kekuatan tekan tertinggi pada umur 56 hari. Penelitian ini menunjukkan bahwa penggunaan fly ash dan Bottom ash tidak hanya mengurangi pencemaran lingkungan tetapi juga dapat menghasilkan beton dengan kinerja yang baik, terutama pada umur beton yang lebih lama.
Kajian Kapasitas Struktur Atas Jembatan Rangka Baja Eksisting Berdasarkan Standar Pembebanan SNI 1725:2016 Menggunakan MIDAS Civil (Studi Kasus: Jembatan Sungai Kembung Luar Kecamatan Bantan) Dedi Enda; Roma Dearni Roma; Yessy Susanti
SAINSTEK Vol. 14 No. 1 (2026)
Publisher : Sekolah Tinggi Teknologi Pekanbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35583/js.v14i1.452

Abstract

Jembatan Kembung Luar merupakan sarana transportasi penting yang menghubungkan Desa Pambang dengan Desa Teluk Lancar di Kabupaten Bengkalis, Provinsi Riau. Jembatan rangka baja yang dibangun pada tahun 2003 ini memerlukan evaluasi berkala untuk memastikan kapasitas dan kelayakan strukturalnya masih memadai. Penelitian ini bertujuan mengevaluasi kapasitas dan kinerja daya layan struktur Jembatan Rangka Baja Sungai Kembung Luar berdasarkan kondisi eksisting, mengacu pada SNI 1725:2016 dan klasifikasi jalan yang berlaku. Material baja diasumsikan bertipe BJ-55 dengan tegangan leleh 460 MPa karena tidak tersedia data pengujian aktual maupun dokumen as-built. Pemodelan dan pengecekan kapasitas dilakukan menggunakan MIDAS Civil dengan metode LRFD, mencakup beban mati, beban hidup (lajur "D" dan truk "T" 9 ton), beban angin, dan beban gempa. Hasil analisis lendutan akibat beban truk 9 ton menunjukkan nilai 87,06 mm (Daya Layan 1), 98,43 mm (Daya Layan 2), 93,04 mm (Daya Layan 3), dan 83,01 mm (Daya Layan 4), seluruhnya melampaui batas izin L/800 = 75 mm. Pengecekan kapasitas penampang menunjukkan sejumlah elemen menghasilkan rasio demand/capacity (Rmax) > 1,000. Disimpulkan bahwa jembatan tidak memenuhi persyaratan batas daya layan (serviceability limit state) ditinjau dari lendutan, dan terdapat elemen yang tidak memenuhi kapasitas penampang berdasarkan SNI 1725:2016. Diperlukan evaluasi lanjutan, perbaikan struktural, dan pengujian material aktual.
Analisis Perhitungan Quantity Take Off Jembatan Rangka Baja Menggunakan Metode (BIM) dengan Autodesk Revit(Studi Kasus: Perencanaan Jembatan Ruas Selat Baru - Deluk) Azmi Maulana; Dedi Enda
Jurnal Ragam Pengabdian Vol. 3 No. 2 (2026): Mei-Agustus, Sustainable Development Goals (SDGs): Multidisciplinary Perspectiv
Publisher : Lembaga Teewan Journal Solutions

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62710/s9h6qs77

Abstract

The construction industry is increasingly adopting Building Information Modeling (BIM) to support Quantity Take Off (QTO), as conventional methods based on two-dimensional drawings, which are still widely used in Indonesia, are prone to measurement errors, inconsistent results, and time inefficiency. This study aimed to develop a three-dimensional BIM model of a steel truss bridge using a case study of the Selat Baru–Deluk Bridge with Autodesk Revit and compare the calculated concrete and reinforcement volumes with manual calculations. The model was developed by converting two-dimensional Detail Engineering Design (DED) drawings into a three-dimensional model. Volume calculations were automatically generated using the Schedule/Quantities feature in Autodesk Revit, while the conventional method used simple geometric formulas. The results showed that the average difference between the two methods was only 0.107% for concrete and 0.463% for reinforcement. The Root Mean Square Error (RMSE) values were 0.511% for concrete and 1.402% for reinforcement. These findings indicate that BIM-based quantity estimation using Autodesk Revit provides higher accuracy, efficiency, and precision compared to conventional methods in bridge QTO calculations.
Analisis Perhitungan Quantity Take Off Struktur Jembatan Beton Bertulang Menggunakan Metode BIM (Revit) (Studi Kasus: Jembatan Ruas Batu Panjang – Pangkalan Nyirih, Kecamatan Rupat) Nadia Sahira; Dedi Enda
Jurnal Ragam Pengabdian Vol. 3 No. 2 (2026): Mei-Agustus, Sustainable Development Goals (SDGs): Multidisciplinary Perspectiv
Publisher : Lembaga Teewan Journal Solutions

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62710/jx5hmm70

Abstract

The development of Building Information Modeling (BIM) provides an effective alternative for Quantity Take Off (QTO) calculations in reinforced concrete bridge construction. Conventional QTO methods based on two-dimensional drawings are prone to human error and require considerable time. This study analyzes the QTO results of the reinforced concrete structure of the Batu Panjang–Pangkalan Nyirih Bridge, Rupat District, using Autodesk Revit, compares them with conventional calculations, and evaluates their accuracy through percentage error and Root Mean Square Error (RMSE). A quantitative comparative approach was employed by modeling the bridge structure in Autodesk Revit and calculating gross concrete volume, reinforcement volume, and net concrete volume for the box culvert, abutment, wing wall, and loneng components. The results indicate strong agreement between the two methods, with an average percentage error of 0.028% for concrete and 1.247% for reinforcement. The RMSE values were 0.032% and 1.374%, respectively. The main differences were found in reinforcement calculations because Autodesk Revit models reinforcement details more precisely, including bar lengths and bends. These findings demonstrate that BIM-based QTO using Autodesk Revit is a reliable, accurate, and efficient alternative to conventional methods.
Co-Authors Azmi Maulana M. Bayu Fernando Syahfikri Muhamad Akbar Nadia Sahira Roma Dearni Roma Dearni Roma Rubiasih Afrida Yessy Susanti