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Indonesia is in an earthquake-prone region, therefore, designing building constructions that can withstand seismic loads is crucial in civil engineering. Reinforced concrete shear walls are one of the vertical structural fundamentals that are effectively used in multi-story buildings to withstand lateral forces due to earthquake and wind loads. Structures that use shear walls can increase stiffness and reduce horizontal deviations (deflections) of buildings, which contribute to the stability and safety of structures based on the SNI 1726:2019 standard. This study aims to analyze the effect of shear wall configurations on deviation and torsion requirements in multi-story building planning. The study object is a 6-story reinforced concrete building model in a specific earthquake zone. The design and modeling were performed using structural analysis software, taking into account columns, beams, slabs, and shear walls. The analysis results show that optimal placement of shear walls at the building edges significantly reduces horizontal drift, torsion, and shear forces, and improves the structural performance level compared to structures without shear walls or those with less effective placement. Structures with shear walls have optimal stiffness in absorbing lateral forces, making them more resistant to damage from the planned earthquake.

Time delays and cost overruns remain major problems in building construction projects, particularly in concrete structural works that dominate project duration and cost. This study aims to evaluate the application of re-engineering in concrete structural work methods on the time and cost performance of multi-storey building projects. A quantitative approach using a case study method was employed through comparative analysis between the existing method and alternative methods. The analyzed alternatives include ready-mix concrete with Sika Viscocrete 8007 admixture and semi-system formwork as Alternative I, ready-mix concrete with system formwork as Alternative II, and ready-mix concrete with Sika Viscocrete 8007 admixture combined with system formwork as Alternative III. The results show that all alternatives perform better than the existing method with a duration of 243 days. Alternative I reduced the duration to 208 days with cost efficiency of IDR 55,781,730 or 0.214 percent. Alternative II reduced the duration to 203 days with cost efficiency of IDR 187,553,261 or 0.724 percent. Alternative III achieved the best performance with a duration of 168 days, accelerating 75 days and providing the highest cost efficiency of IDR 243,334,991 or 0.941 percent. The study concludes that re-engineering effectively improves project time and cost performance, with Alternative III as the optimal method.

Advances in digital technology have opened up significant opportunities for utilizing media as a tool for education, creativity, and religious outreach. However, the low level of digital literacy among the public, particularly the younger generation, means that the use of digital media remains largely limited to entertainment. This community service activity aims to enhance participants’ understanding and skills in utilizing digital media productively through the seminar “Halal Profits, Maximum Rewards through Digital Da’wah” at MWC NU Waru Sidoarjo. The method employed was Participatory Action Research (PAR) with data collection techniques involving observation. The results of the activity showed an increase in participants’ knowledge regarding digital da’wah, the positive use of social media, and halal economic opportunities through digital content. Additionally, participants demonstrated high enthusiasm and began to understand the importance of using technology wisely and productively. This activity is expected to serve as a first step in improving digital literacy, community empowerment, and the strengthening of Islamic values through digital media.

A building feasibility evaluation study is an important step to ensure the safety, comfort, and sustainability of building functions, especially in public service facilities. This activity was carried out at the PLN ULP Praya office building, Central Lombok Regency, West Nusa Tenggara, which has been operating since 1985. The purpose of this study was to determine the level of building feasibility based on structural, architectural, utility, safety, and health aspects of the building. The methods used included visual inspection, field measurements, hammer tests, and analysis of the condition of building elements based on building feasibility inspection standards. The inspection results showed that the building suffered severe damage characterized by foundation subsidence, large cracks in the walls, reinforcement corrosion, concrete peeling, and damage to the roof frame. The structural strength value obtained was below the construction feasibility standard so that the building was declared structurally unfit for function. Although several supporting aspects such as lighting, drainage, and sanitation systems still functioned quite well, the damaged condition of the main structure has the potential to endanger the safety of users. Therefore, rebuilding the building structure is recommended as the safest solution to ensure the safety, stability, and sustainability of the building's function in the future.

Bangunan Landhuizen Kelengan di Kota Semarang, merupakan salah satu bangunan yang memiliki arsitektur Indische Empire Style. Arsitektur Indische Empire Style merupakan arsitektur yang bukan murni arsitektur Belanda, tetapi sudah beradaptasi dengan iklim setempat. Arsitektur Indische Empire Style hadir melalui karya arsitek Belanda dan diperuntukkan bagi bangsa Belanda yang tinggal di Indonesia, pada masa sebelum kemerdekaan Indonesia. Bangunan Landhuizen Kelengan dibangun pada awal abad ke 18, tetapi tidak ada data pasti mengenai tahun berdirinya bangunan tersebut. Fungsi awal bangunan ini merupakan sebuah rumah tinggal dari seorang pejabat VOC (Vereeniging van Oost-Indische Compagnië) yang bernama Tuan Klein, kemudian berpindah tangan kepada Be Biauw Tjoan, seorang pedagang, pebisnis, serta pemimpin masyarakat Tionghoa (opsir) di Kota Semarang. Penelitian ini bertujuan untuk mengetahui gaya karakter arsitektur Indische Empire Style pada bangunan Landhuizen Kelengan di Kota Semarang. Penelitian ini menggunakan metode deskriptif kualitatif, yaitu dengan melakukan observasi, pengukuran, pengambilan foto, serta dokumentasi  secara langsung di lapangan. Hasil penelitian pada bangunan Landhuizen Kelengan berupa temuan elemen penyusun fasad pada bangunan yang berarsitektur Indische Empire Style.

The construction sector is an industry with a high level of work accident risk due to its dynamic and complex work characteristics. This study aims to examine the application of the Occupational Health and Safety (OHS) System and evaluate its effectiveness in mitigating risks at the Health Facility Building Construction Project (Project X) in Fakfak Regency. The research method used is a descriptive-analytical quantitative approach with purposive sampling of 25 respondents, including executors, supervisors, and field workers. Risk analysis was conducted using the Failure Modes and Effects Analysis (FMEA) method by measuring Severity, Occurrence, and Detection parameters to produce a Risk Priority Number (RPN). The results show that RPN values range from 52.35 to 452.30. The highest risk was found in the variable of limited safety signage in hazardous locations (RPN 452.30), which falls into the very high category. Additionally, 10 high-risk variables and 9 medium-risk variables were identified, dominated by technical, operational, and management factors, such as the use of heavy equipment by uncertified operators and weak implementation of Standard Operating Procedures (SOP) and OHS audits. This study concludes that the application of OHS in Project X is still reactive and requires strengthening risk-based safety management systems as well as improving workforce competence to achieve zero accident conditions.

Procurement of Government Goods / Services is a government spending mechanism that plays an important role in the utilization of state budget. Construction services are sectors that play an important role in Indonesia's development. Through this sector, the physical progress of development can be seen directly. In practice in general the implementation of procurement of goods / services Government construction often occurs problems, among other things, violations of both the Procurement Procurement procedure and the infringement that are detrimental to the State or the criminal act of corruption perpetrated by the organization of procurement of goods / services Construction. The purpose of this study is to determine the legal arrangements for the procurement of goods / services of construction after Perpres No. 4 Tahun 2015 and To know how the implementation of the application of criminal law of corruption in the field of goods / construction services on the decision No. 42/Pid.sus-TPK/2019/PN.KPG. This research is a normative research using primary data and secondary data. The data were collected through interview method and literature study which then analyzed qualitatively and presented descriptively. Based on the results of research has been done, the authors concluded that (1) has been arranged various legal instruments related to the implementation of procurement of goods / government construction services starting from the Act up to the Presidential Decree as a technical arrangement; and (2) the application of criminal law of corruption to the decision No. 42Pid.sus TPK/2019/PN.KPG has been in accordance with the provisions the provisions of the Act constitution. 20 year 2001 jo constutition No 31 Tahun 1999 about Eradiction Criminal Act of Corruption.

The calculation of work volume and construction costs is a fundamental aspect of project management, as errors in the estimation process can directly affect the preparation of the project budget. Many projects still use conventional methods for estimation, which are based on 2D working drawings with the assistance of Microsoft Excel, as seen in the Sungai Raya Religious Court Building project. This method is considered prone to calculation errors and less efficient due to the considerable amount of time required. With the advancement of technology, Building Information Modeling (BIM) has emerged, enabling automatic and integrated calculation of work volumes and construction costs through a three-dimensional digital model. This study aims to examine the implementation of BIM in the Sungai Raya Religious Court Building project and to compare the results of work volume and construction cost calculations between the BIM method using Autodesk Revit and the conventional method based on the project’s Bill of Quantity (BoQ). The research method was conducted by modeling the structural elements of the building, including pile caps, tie beams, columns, beams, floor slabs, and reinforcements. The results of work volume and construction cost calculations obtained from Autodesk Revit were then compared with the project’s BoQ as the conventional method. Based on the analysis, an average difference of 6.3% in work volume and 5.6% in construction cost was found, with the Autodesk Revit calculations showing slightly lower values compared to the project’s BoQ.

This study analyzes a 10-floor multi-story lecture building in Lombok, focusing on the impact of concrete quality degradation on the building's performance. Due to limited material access, the actual on-site concrete quality changed from the design quality of fc 30 MPa to fc 24.9 MPa. The building structure was modeled in 3D using ETABS v22 software, and two structural models were compared: one with the design concrete quality (fc' 30 MPa) and one with the actual quality (fc' 24.9 MPa). The analysis evaluated dynamic performance, inelastic displacements, P-Delta effects, and reinforcement requirements. The comparison aimed to assess the impact of concrete degradation on structural stiffness, inter-story displacements, and reinforcement needs. The results show that concrete quality deterioration increases the structure's vibration period, inelastic displacement, and lateral forces due to P-Delta effects. While beam reinforcement requirements remain mostly unchanged, column reinforcement significantly increases, especially in columns with large axial forces. This study provides valuable insights into the technical consequences of concrete quality degradation and serves as a reference for evaluating structural redesigns in projects facing material limitations.

This study examines the application of double integrals in calculating the volume of cylindrical concrete piles as a basis for estimating material requirements in building foundation structures. The volume calculation was carried out using a double-integral approach in polar coordinates for three pile segments with lengths of 4 m, 3.9 m, and 4 m, each having a diameter of 60 cm. The results were then validated using the standard geometric formula to ensure consistency and mathematical reliability. The obtained concrete volume was subsequently used to estimate material needs based on a 1:1.5:3 mix proportion consisting of cement, sand, and gravel. The findings indicate that double integrals can be effectively applied to generate accurate estimations of both volume and material requirements, supporting logistical planning in construction. This approach also highlights the strong connection between mathematical concepts—particularly multivariable calculus—and practical applications in civil engineering. Furthermore, the study emphasizes that double integrals may serve as a relevant alternative when structural modeling requires deeper analytical exploration or validation beyond conventional geometry. Therefore, the implementation of double integrals not only reinforces theoretical understanding but also enhances precision in evaluating structural components within building foundation planning.

Work volume calculations are essential for project cost estimation. Many projects, such as the Laboratory Building of the Faculty Engineering at Tanjungpura University, calculate work volumes conventionally. Conventional calculation considered less efficient and prone to errors. Building Information Modeling (BIM) provides a solution that produces more accurate and efficient calculations than conventional methods. This research aims to compare structural work volume results produced by BIM using Autodesk Revit against conventional methods and project’s BOQ. This research also describes the benefits and challenges of BIM implementation based on the researcher’s experience applying BIM with Autodesk Revit in work volume calculation. The comparison between BIM and conventional method shows a maximum difference of 2% across all work items. Meanwhile, the comparison between BIM and the BOQ shows significant differences: 81% in column formwork area, 24% in grade beam/beam concrete volume, 25% in column reinforcement weight, 25% in steel beam weight, and 10% in the steel plate weight. This research proves that BIM implementation produces more accurate and efficient calculations and serves as an effective BOQ cross-check tool. Based on the researcher’s experience in implementing BIM with Autodesk Revit, challenges found in procurement aspects, modeling aspects, and model dependency on reference drawings.    

Penelitian ini bertujuan untuk mengevaluasi implementasi Tingkat Komponen Dalam Negeri (TKDN) pada pekerjaan elektrikal proyek konstruksi bangunan gedung pemerintah di Indonesia. Metode yang digunakan adalah pendekatan kuantitatif deskriptif–evaluatif melalui studi kasus pada delapan lokasi proyek pemerintah. Evaluasi dilakukan terhadap capaian TKDN pada pekerjaan MVMDP, LVMDP, pemasangan kabel, pencahayaan, genset, trafo distribusi, dan biaya transportasi berdasarkan dokumen kontrak dan ketentuan regulasi yang berlaku. Hasil penelitian menunjukkan bahwa capaian TKDN antar proyek sangat bervariasi, dengan kecenderungan nilai TKDN rendah pada komponen berteknologi tinggi dan proyek di luar Pulau Jawa. Temuan ini mengindikasikan bahwa keterbatasan material lokal dan ketimpangan distribusi industri menjadi tantangan utama dalam implementasi TKDN. Penelitian ini memberikan kontribusi empiris dalam mengevaluasi kebijakan TKDN pada pekerjaan elektrikal serta menjadi dasar rekomendasi kebijakan peningkatan TKDN yang lebih terarah.

This research examines the implementation of green building principles in the design of the Multipurpose Building at SMP–SMA Islam Hidayatullah Semarang, focusing on energy-efficient strategies and spatial comfort based on the GREENSHIP GBCI certification criteria. The study employs a qualitative descriptive method through interviews with the architect, analysis of architectural drawings, interpretation of interior design visualizations produced by Falana Studio, and literature review on sustainable building design. The findings indicate that the building consistently applies passive design strategies, including the optimization of natural lighting through large openings and a central void, the application of cross-ventilation on each floor, and the integration of façade vegetation that reduces surface temperature and improves microclimate performance. Material selection such as GRC panels, HPL, and modular plywood supports long-term durability, while the interior design demonstrates strong visual comfort and ergonomic quality through indirect lighting, neutral color schemes, and activity-based furniture layout. According to the GREENSHIP assessment categories, the building fulfills Energy Efficiency and Conservation (EEC), Indoor Health and Comfort (IHC), Material Resources and Cycle (MRC), and Appropriate Site Development (ASD) criteria. In conclusion, the Multipurpose Building successfully integrates green building principles as an effective approach to energy efficiency and the enhancement of the educational environment.

Penelitian ini bertujuan untuk menganalisis perbandingan biaya dan durasi proyek sebelum dan sesudah penerapan metode crashing pada pembangunan Gedung Kenanga di Rumah Sakit Paru dr. Ario Wirawan (RSPAW) Kota Salatiga. Metode crashing dilakukan dengan mempercepat aktivitas pada lintasan kritis melalui penambahan sumber daya tanpa mengurangi kualitas pekerjaan. Berdasarkan hasil analisis, durasi proyek berkurang dari 150 hari menjadi 124 hari (efisiensi waktu sebesar 17%). Biaya langsung mengalami peningkatan sebesar 1,11%, sedangkan biaya tidak langsung menurun sebesar 17,33%. Secara keseluruhan, metode crashing menghasilkan penghematan total biaya proyek sebesar 0,74%. Temuan ini menunjukkan bahwa metode crashing dapat menjadi strategi efektif dalam percepatan proyek dengan pengendalian biaya yang optimal. Kata kunci: crashing, lintasan kritis, biaya proyek, durasi proyek, percepatan.

Perhitungan daya dukung pondasi yang akurat menjadi aspek penting dalam memastikan stabilitas dan keamanan struktur bangunan secara keseluruhan. Penelitian ini bertujuan untuk membandingkan nilai daya dukung ultimit (Qu) dari pondasi bored pile dengan menggunakan empat pendekatan berbeda, yaitu perhitungan manual menggunakan metode Schmertmann & Nottingham, Mayerhoff (1976), software Allpile, serta hasil uji lapangan dengan PDA (Pile Driving Analyzer). Studi kasus dilakukan pada proyek pembangunan Gedung Fave Hotel yang terletak di Banyumanik, Semarang. Hasil analisis menunjukkan bahwa metode Schmertmann & Nottingham dengan nilai Qu tertinggi sebesar 282,25 ton. Sedangkan nilai terendah berasal dari hasil uji PDA 159,61 ton. Metode Mayerhoff (1976), memberikan nilai sebesar 170,30 ton, sementara Allpile menghasilkan nilai 160,79 ton. Selisih nilai ini disebabkan oleh perbedaan pendekatan dan asumsi yang digunakan oleh masing-masing metode. Secara umum, hasil PDA dianggap paling merepresentasikan kondisi aktual di lapangan karena merupakan hasil uji dinamis langsung pada tiang. Oleh karena itu, pendekatan manual dan software Allpile dapat dijadikan sebagai estimasi awal dalam tahap desain, namun tetap perlu divalidasi melalui pengujian lapangan untuk memperoleh hasil yang lebih realistis dan dapat diandalkan.

Given the great benefits of electrical energy, the availability of electrical energy sources is limited. Currently, the availability of electrical energy sources is not able to meet the increasing demand for electricity in Indonesia. The high use of electrical energy in daily life will have a negative impact on the environment. Therefore, to maintain the sustainability of energy sources, it is necessary to pursue strategic steps that can support the provision of electrical energy optimally and affordably, This study aims to find out how much total energy is used by the Energy Consumption Index (IKE) on electrical energy from the influence of electrical power and the length of time of use of electrical energy at SMK Negeri 2 Lubuk Basung, Lubuk Basung District, Agam Regency. This study aims to determine the value of energy consumption used or Energy Consumption Index (IKE) and energy saving opportunities at SMK Negeri 2 Lubuk Basung, Lubuk Basung District, Agam Regency. The results of this study are for the IKE value of the first floor which is 1.71 kWh/m2, for the IKE value of the second floor which is 0.03 kWh/m2, for the IKE value of one building, which is with a value of 1.74 kWh/m2, for the annual IKE of 0.022 kWh/m2/year and for the value of energy-saving opportunities of IDR 651 646/month IDR 7 819 755/year.

This study examines the legal protection provided to holders of Building Use Rights (HGB) on land under Management Rights (HPL) as interpreted in Supreme Court Decision No. 2160 K/Pdt/2017. The research aims to understand how civil law is applied to ensure legal certainty for HGB holders on HPL land and to strengthen insight into civil law principles used in resolving land-rights disputes. In the juridical context, land refers to the earth’s surface, while land rights are defined as authority over a specific, limited portion of that surface. Legal certainty, based on written regulations implementing the Basic Agrarian Law No. 5 of 1960, provides clarity regarding the rights and obligations of parties who own or control land. The study was conducted at the Sragen Police Resort using documentation methods—reviewing legal texts, literature, and supporting materials—along with field data obtained through interviews with relevant officers and individuals familiar with the case. The findings show that the Judex Facti of the West Java High Court made an error by declaring that no new issues required examination without giving adequate legal reasoning. The court also failed to address the objections submitted by the appellant, violating Article 50 paragraph (1) of Law No. 48 of 2009 on Judicial Power. Consequently, the Supreme Court annulled the previous decision, clarifying the legal consequences and strengthening the interpretation of HGB status on HPL land.

The Indonesian Naval Academy (AAL) as a military educational institution requires a large electricity supply to support its operational activities, including in the Sapudi Building of the Engineering Department. This study aims to design a solar energy system to supply the electricity needs for lighting in the building. The method used is Research and Development (R&D) with the ADDIE model (Analysis, Design, Development, Implementation, Evaluation). Data collection was conducted through direct observation of building conditions, electrical equipment, and solar radiation intensity data in Surabaya. The research results show that the total electricity requirement for lighting in the Sapudi Building is 4.686 kW with a total of 143 lights (96 neon lights and 47 light bulbs). Based on calculations with an average solar radiation of 5.00 kWh/m²/day, the designed system requires 41 units of Solar PV Lesso HPM 550W panel type with 21.3% efficiency and 9 units of Panasonic LC-P12100NA batteries with a capacity of 100Ah arranged in 3 series and 3 parallel configurations. This study proves that the utilization of solar energy can be an efficient and sustainable alternative solution to reduce dependence on conventional electricity in the AAL environment, while supporting the implementation of renewable energy in Indonesian military institutions.

Beban gempa merupakan representasi dari beban statik ekuivalen yang diaplikasikan pada seluruh bagian struktur bangunan atau pada bagian tertentu, dengan tujuan menirukan efek gerakan tanah akibat aktivitas seismik. Di antara berbagai metode analisis, analisis time history dikenal sebagai teknik yang paling presisi dalam memprediksi respons struktur terhadap gempa. Namun, penerapan metode ini memerlukan proses perhitungan yang kompleks dan cukup menyita waktu. Untuk menyederhanakan proses tersebut, digunakan pendekatan analisis statik ekuivalen, yang terbukti cukup efektif, khususnya pada struktur bangunan yang bersifat simetris. Prosedur perhitungan dalam metode ini mencakup evaluasi gaya geser serta simpangan antar lantai, dengan studi kasus berupa gedung perkantoran yang berlokasi di Kota Semarang. Perangkat lunak SAP2000 dimanfaatkan sebagai alat bantu dalam melakukan analisis tersebut. Berdasarkan hasil analisis, gaya geser dan simpangan antar lantai yang diperoleh telah sesuai dan memenuhi ketentuan yang ditetapkan dalam standar SNI 1726:2019 untuk bangunan gedung.

Penelitian ini menganalisis kekuatan pondasi tiang pancang pada proyek pembangunan Apartemen Arjuna Bima di Kabupaten Sleman. Penyidikan tanah menggunakan boring pada titik B2 menunjukkan bahwa lapisan tanah keras maksimum berada pada kedalaman 25 meter, sementara hasil bor tangan mengidentifikasi tanah berupa pasir sedang berwarna coklat keabu-abuan. Tiang pancang dipilih karena kemampuannya untuk memadatkan tanah pasir sedang selama proses pemancangan. Penelitian ini menggunakan metode kuantitatif dengan teknik pengumpulan data sekunder melalui studi literatur dan dokumentasi. Semua perhitungan dilakukan menggunakan metode Meyerhof, sedangkan analisis pembebanan struktur dilakukan dengan perangkat lunak ETABS v22. Analisis ini mencakup perhitungan kapasitas dukung aksial, kapasitas dukung lateral, dan penurunan pondasi akibat beban struktur atas. Hasil analisis menunjukkan bahwa beban aksial (P) sebesar 710,77 ton. Kapasitas dukung aksial kelompok tiang pancang (Qg) dengan diameter 80 cm, 60 cm, dan 42,9 cm pada kedalaman 20 m berturut-turut adalah 2.125,87 ton; 1.347,68 ton; dan 710,51 ton. Kapasitas dukung lateral (Hg) untuk ukuran tiang yang sama berturut-turut adalah 1.169,9 ton; 877,4 ton; dan 627,4 ton. Penurunan pondasi kelompok tiang (Sg) masing-masing adalah 2,46 cm; 2,1 cm; dan 2,03 cm. Berdasarkan hasil analisis, pondasi tiang pancang dengan diameter 80 cm dan 60 cm memenuhi syarat keamanan baik dari segi kapasitas dukung aksial maupun lateral, serta penurunan pondasi. Namun, untuk tiang pancang dengan diameter 42,9 cm, kapasitas dukung aksial tidak memenuhi syarat keamanan (Qg < P), sehingga tidak direkomendasikan untuk digunakan.