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Ergonomics risk factors analysis of building construction work in SARBAGITA Region Bali Indonesia
No full textThe main objective of this research is to analyze Ergonomics Risk Factors and MSDs Rate in building construction work in the SARBAGITA area of Bali, Indonesia. SARBAGITA, an acronym for Denpasar, Badung, Gianyar, and Tabanan, is the largest metropolitan area in the Nusa Tenggara Islands and the second largest in the Eastern Indonesia Region after the metropolitan city of Mamminasata in South Sulawesi. Therefore, various infrastructure facilities have been developed, including office buildings, hotels, and other public facilities. The development of infrastructure in the SARBAGITA can be seen through the number of active construction companies. In 2020, the number of active construction companies was 987, decreased slightly during the COVID-19 pandemic in 2021 to 883, and rose again to 997 in 2022. If each company has at least one construction project, then the number of active projects in 2022 was 997. Construction work is very complex, especially in building construction. Involving a large number of workers with varied backgrounds, most of the work is carried out outdoors, using a variety of heavy-duty equipment, and involving hazardous materials. Construction work has a high risk of accidents and work-related diseases from aspects of biology, physics, chemistry, ergonomics, and even psychology. 
Analysis of cantilever beam reinforcement methods and costs in the Wonderland Uluwatu Project
No full textA strong and durable structure is the expectation for every building. However, in the implementation of concrete manufacturing projects, there are still many issues due to the quality of concrete not meeting the plan specifications, resulting in an inability to withstand the working load. For example, in the building construction project at Wonderland Uluwatu, the planned concrete quality for the cantilever beam was K300. However, when the hammer test was conducted at 28 days of curing, the expected quality was not achieved. So, a cantilever beam is necessary to repair and strengthen the concrete structure of the building to ensure its safety. This research compares the reinforcement methods for cantilever beams in terms of cost. Two cantilever beam reinforcement methods will be implemented: first, steel jacketing reinforcement using 8 mm and 10 mm thick steel plates; second, IWF steel reinforcement with dimensions of 500 mm x 200 mm x 10 mm x 16 mm. These reinforcement methods will be evaluated through deflection analysis and deviation analysis. The results of this study indicate that the cost of the steel jacketing reinforcement method with thicknesses of 8 mm and 10 mm amounts to Rp. 345,086,768.00. 
Evaluation of project implementation control in pre-construction stage to improve service provider performance in government procurement of goods and services
Get PDFThis study aims to determine what evaluation activity factors have an impact on the performance of service providers based on Circular Letter No. 18/SE/M/2021 which is carried out on the type of tender/auction with a single-file evaluation method for the kind of procurement of goods/services that uses the lowest price evaluation method of the post-qualification knockout system on projects with a unit price system. This study found that all independent variables, namely arithmetic corrections, conflicts of interest and indications of collusion, administration, qualifications, technical, price and specifications, design and changes, impact the performance of service providers, which are dependent variables. Technical evaluation activities and qualification evaluations have a dominant influence among other variables on the performance of service providers. This research produces modeling and improvements to improve the performance of service providers in the pre-construction stage, which is expected to minimize problems during the project
Development of risk-based BIM integrated material resource control procedures to improve time performance on public facility construction projects in the Seribu Islands
Get PDFThis study aims to develop a material resource control procedure from a contractor's perspective that is integrated with 4D and 5D Building Information Modeling (BIM) technology, based on dominant risks at each stage, to improve project time performance. The research approach includes the identification and analysis of dominant risks, integration of activities with BIM, and data processing using the Delphi method and statistical analysis with SPSS version 27. The results of the study showed seven improvements to existing activities and the addition of nine new activities at the stages of shipping, receiving, storing, distributing, and using materials. Of all these activities, twelve can be integrated with BIM technology according to the results of risk validation. To ensure the feasibility of implementation, the developed procedure was tested through a case study on the Public Facility Construction (PFU) project in Gusung Klanceng. The results of the case study showed that the integrated BIM risk-based procedure was able to improve the accuracy of material requirement estimates and control project schedule changes, thereby supporting the achievement of time targets more optimally
Analysis productivity and its impact on time and cost of implementation of the private residence project structure work
No full textThe construction project of Mrs. Tiya & Mr. Tom's Private Residence in Kemenuh-Gianyar is a 3-story villa development chosen as a case study due to discrepancies between the consultant's plans and the actual field conditions. This necessitated a method to optimize work completion. One proposed solution for accelerating the project was to add more workers. Based on the initial plan, the project required 104 days (3 months and 2 weeks) for completion, with a total structural work cost of Rp. 703,803,162.24. After analysis with the alternative of adding more workers, the project completion duration could return to the schedule of 90 days (3 months) or be accelerated by 12 days (2 weeks), with a total cost of Rp. 671,298,258.93. This concludes that adding more workers is an effective method to increase time efficiency by 14.29% and decrease costs by 4.6%, or the equivalent of Rp. 32,504,903.31
Technical, economic, and environmental feasibility of implementing a mini hydroelectric plant with a reversible system
Get PDFMini hydroelectric plants are a renewable energy source that harnesses the flow of water to generate electricity sustainably on a smaller scale. The objective of this research is to analyze the technical, economic, and environmental feasibility of mini hydroelectric plants. implementation of a mini hydroelectric plant with a reversible system, taken as a basis of this study, examines the "La Esperanza" dam to provide electricity to the communities supplied by the Calceta substation. The methodology employed was a literature review, resulting in a research thesis that allowed for the analysis of data collected at the study site. The results indicate that poor management and lack of maintenance have rendered the dam inoperable. Furthermore, the research suggests the possibility of converting the dam from storage to pumped storage and restoring the plant to operation. The ratio between energy generated and energy used for pumping revealed that this is technically feasible. Finally, it was concluded that, due to the results obtained, through economic investment and proper management, the mini hydroelectric plant in Manabí will be able to guarantee a continuous and sustainable energy supply to different communities that currently have poor energy quality and others that are not electrified
Integration of ergonomic principles in the design and construction of car wheel polishing tools to improve operator performance
No full textThe use of manual tools in the process of polishing car wheels is still widely found in variety workshops, which has an impact on low work efficiency and high physical load of operators. This research aims to design and build ergonomics-based car wheel polishing tools to improve operator efficiency and work comfort. The method used is design and construction with an ergonomic approach, starting from identifying user needs, collecting anthropometric data, to testing the functional of the tool. The design of the tool was adjusted to the anthropometric data of 10 workshop operator respondents, resulting in a tool with dimensions of 100 cm × 70 cm × 120 cm. The evaluation was carried out by comparing the polishing performance manually and using tools in terms of working time, fatigue level (Borg CR-10), and work posture (RULA). The results showed that the average polishing time decreased from 65 minutes (manual) to 12.3 minutes (using tools), with a time efficiency of 80.8%. The fatigue score decreased from 7.6 to 2.9, and the RULA score showed a decrease in ergonomic risk from high to moderate-low. The paired t-test showed a statistically significant difference (p < 0.05) across the parameters tested. 
Combining hydraulic roughness measurement results with Manning's roughness coefficient in drainage channels: A case study of drainage channels in Denpasar City, Bali Province
No full textTo measure its reliability, the quality of work and materials should be assessed using objective tools and methods. For example, concrete quality is measured using tools and methods of compression testing or a hammer test tool; the results are expressed in terms of characteristic compressive strength (f'c). Steel quality is determined by the tensile test method, and the quality or strength is expressed in tensile strength (fy). The quality of the highway surface is determined by the roughness test method using the NAASRA roughness meter and the results are expressed with good, moderate and poor criteria, correlated with the International Roughness Index (IRI) value, namely good roughness if the IRI value is <75 inches/mile, moderate for IRI values between 70-170 inches/mile and poor IRI > 170 inches/mile. The hydraulic quality of the drainage channel surface to date cannot be determined with objective tools and methods. Similar to the quality of the road surface, the hydraulic quality of the channel is also determined based on the criteria: good, moderate/normal, and poor, correlated with the Manning roughness coefficient; the difference is that there is no objective value for the good, moderate, and poor criteria.
Fuzzy risk analysis for field condition, external, and technical risk factors in Subsea Pipeline Construction Projects to improve contingency cost accuracy
Get PDFThis study focuses on identifying the relationship between risk factors related to environmental conditions, external factors, and technical aspects that affect the cost performance of underwater pipeline construction projects. The main objectives of this study are to understand the qualitative risk assessment that affects the contingency cost performance of underwater pipeline construction projects, and to identify the relationship between various risk factors. The methodology in this study involves a case study approach on a submarine pipeline project in the Java Sea, utilizing historical analysis and expert information to identify potential risks and their impacts on project costs using fuzzy-based qualitative and quantitative analysis. The study found two field condition risk factors, one external risk and thirteen technical risk factors in a submarine pipeline construction project using the S-Lay method. In an academic context, this study conducts an in-depth and detailed analysis of the identification stage, analysis, classification of risk levels (field conditions, external and technical), relationships between risk variables, corrective actions, corrective action costs, and contingency cost analysis. The results of the analysis help in estimating project costs in more detail
Proposal of a photovoltaic system in areas of the technical University of Manabí
Get PDFSolar energy has managed to establish itself as one of the most promising and sustainable alternatives when it comes to addressing the different energy challenges at a global level, especially in developing countries, which do not have a good energy system since their electricity grids can present drawbacks. Currently, in Ecuador, periodic power outages affect both residential and educational areas, making daily activities and the development of academic projects difficult. This phenomenon is very notorious in the province of Manabí, specifically in the Technical University of Manabí, which has frequent interruptions of the electricity supply, which affects its normal operation. The aim is to propose the installation of a photovoltaic system, which is responsible for transforming solar energy into electricity, thus being a sustainable solution that, in addition to helping to reduce dependence on the conventional electricity grid, would also contribute to the transition to renewable and clean energy sources. The result was that the installation of photovoltaic systems at the Technical University of Manabí is a viable solution to counteract recurrent blackouts and move towards greater energy sustainability