Construction Of Multi-storey Buildings Research Articles

Analisis Penerapan Sistem Manajemen Keselamatan dan Kesehatan Kerja (K3)

Along with the rapid pace of development of multi-storey building construction in indonesia, it creates a high risk of work accidents, especially for field, workers therefore the role of controlling the risk of woek accidents is compulsary. Poor implementation of occupational health and safety can damage the occupational health and safety management (OHSM) system in a construction project. So the problem is wich factors are dominant in the application of OHSM in the construction of the Bapelkes building and what is the level of application of OHSM in the construction project. This study aims to analyze the level of implementation of OHSM implementation in the construction of the Bapelkes building. This research method uses quantitative and qualitative approaches through interviews and distributing questionnaires to PT. The work of Mukti Bersaudara as many as 12 people. This study consisted of 9 variables. The result of the validity test of the mean value of r-count of each variable is 0.81 and the r-table value is 0.497, so it fulfills the requirements of r-count> r table. The result of the reliability test on each variable obtained an average value of 0.8 and Cronbach’s Alpha critical value of 0.6, wich is means all variables are declared reliable. The result of the descriptive analysis of the highest mean value were obtained in the factor of development and commitment maintenance (X1) with a value of 4.72, and the last order was obtained the variable (X2) with a value of 4.45. it can be concluded that the very dominant factor in implementing OHSM in Bapelkes building construction projects is the development and maintenance of commitment (X1). The implementation of OHSM in the construction of new dormitory and class building project for the National Health planning Agency (Bapelkes) has been implemented well-planned, measured, and structured, and properly integrated according to the PP. No. 5 of 2012 concerning the occupational health and safety management system, although it has not been fully implemented, it is obtained from the average percentage of application assesment, which is 92.0%

The Effectiveness Of Using Column Formwork In A Multi-Story Building Construction Project

Building the structural components is crucial for constructing a multi-story building. In the process of creating these components, which is commonly done through casting, a tool called formwork is required. Formwork is a tool used to mold the necessary concrete structures, ensuring that their shape and dimensions align with the concrete material's planning. Formwork tasks for concrete work significantly impact costs. Different formwork options, including traditional, semi-system, and full-system forms, are available. This research aims to assess cost-effectiveness through value engineering, specifically focusing on column formwork, by comparing their utilization in a multi-story construction project. The study begins by collecting primary data, namely working drawings, so that the volume of conventional formwork can be calculated. Then, budget planning calculations are made to analyze the cost comparison of each formwork alternative. The selection of the appropriate formwork affects the speed of execution and the costs incurredIn this construction project for the building, the conventional column formwork results in expenses amounting to IDR 587,749,263.04 and requires 28 days for completion, while semi-system column formwork achieves a 37% cost saving with the same duration of 28 days, and full-system column formwork becomes 64% more cost-effective with a construction period of 10 days.

SELECTION OF OPTIMAL PARAMETERS OF A LIGHTWEIGHT FLAT FLOOR WITH VOIDS MADE OF PLASTIC BALLS

Formulation of the problem. Architectural and construction design of buildings using reinforced concrete has led to an increase in the number of objects with an individual space-planning structure, a rich variety of facade and volumetric solutions. Today the question of the effectiveness of using flat prefabricated monolithic lightweight floors in the construction of multi-storey buildings with individual space-planning and architectural solutions is relevant. In a market economy interest in the issue of rational use of resources, namely the cost of concrete and reinforcement in construction, has sharply increased, which is directly related to attracting investment. As it is known, when designing buildings from prefabricated monolithic reinforced concrete, in contrast to prefabricated concrete, there is greater freedom in adopting the space-planning parameters of the building, and there may also be simpler design solutions, in particular for floors. The constructive solution of floors depends on numerous requirements for the building as a whole and directly for the floor. One of the requirements that influences the attraction of investments is a small material-intensive floor covering with significant spans of buildings of various structural systems. The effective use of lightweight precast monolithic reinforced concrete floors with voids made of plastic balls in construction requires a comprehensive technical and economic analysis of this innovative solution for the precast monolithic reinforced concrete floor structure. The purpose of the article is to perform a technical and economic comparison of various design options for a flat lightweight prefabricated monolithic floor. The influence of floor parameters on the consumption of concrete and reinforcement is considered. Conclusion. As a result of the research, it was established that it is rational to use hollow balls made from recycled materials as a material for making voids from balls in flat floors. Moreover, all studied floor options with spans of 6 m, 7 m, 8 m and void sizes made of balls with diameters of 180 mm, 315 mm and 50 0mm meet the requirements of the first and second groups of limit states.

Occupational safety & health risk analysis in formwork in high-rise building projects

The implementation of Occupational Health and Safety Management systems remains a significant concern, particularly in the context of multi-storey building construction projects. Within the realm of these complex endeavors, the management of work-related accidents during formwork operations is of paramount importance. This research employs a rigorous methodology involving questionnaire distribution and interviews, complemented by advanced analytical tools such as the Frequency Adjusted Importance Index (FAII) and Bow Tie Analysis. The study focuses on the Indonesian Development University’s high-rise building project, systematically assessing potential hazards associated with formwork activities. Furthermore, this research evaluates the inherent risk levels and proposes comprehensive control measures to mitigate these hazards effectively. By shedding light on the intricate interplay between safety management and high-rise construction, this study contributes to the enhancement of occupational safety and health practices in the construction industry, ultimately promoting safer and more efficient work environments.

Value Engineering Of Modern Formwork In Multi-Story Building Construction Case Study On The Construction Project Of The Brin Building Complex In Yogyakarta

Reinforced concrete is the most commonly used construction material in building construction in the 21st century. In its production, supportive instruments are needed to enhance both quality and economic aspects. Formwork, or shuttering, is a crucial factor in the casting and hardening of concrete. The subject of this research is wooden formwork and its alternatives, analyzed in terms of cost, quality, time, and convenience using the Value Engineering Job Plan analysis. In terms of cost, there is a cost savings of 8.88% for DUO polymer formwork compared to the conventional plywood method. The resulting surface quality of the concrete of this method has a average roughness of 3.492. The total duration of the work is 16.54791 days. The total value index obtained for the use of DUO polymer formwork is 98.99, for the plywood film formwork is 48.17, and for conventional plywood formwork is 0.00. Thus, in terms of value, the DUO polymer plastic formwork can be recommended as the best formwork method for multi-story building construction. Considering the advantages and disadvantages of this method, along with the benefits obtained, it would be even more beneficial on a larger construction scale.

Moisture safety strategy for construction of CLT structures in a coastal Nordic climate

To reduce the carbon impact of new buildings, wood is seeing increased use as a structural material. Cross-laminated timber (CLT) and glue-laminated wood (glulam) elements allow the construction of multi-storey buildings. However, wood is vulnerable to moisture, especially when naked wood is exposed to weather during the construction process. This paper presents the moisture strategy employed during the construction of a four-storey CLT/glulam building in Trondheim, Norway. The building was constructed without the use of a weather-protective tent, requiring alternative protective measures. The construction of the main structure was scheduled to be as short as possible. Local protective measures were employed to protect the structure from rain and free water was removed after rain events. The project was closely supervised by the client, with particular care for moisture control. Moisture was regularly measured at 50 points throughout the building. No wooden surfaces were encapsulated until a wood moisture content below 15 weight-% was measured. The performance of the moisture strategy was evaluated using measurements of wood moisture, indoor climate, airtightness, and visual inspections. The wood moisture content quickly decreased as the building envelope was assembled, indicating that drying was well facilitated. In the first year after construction, gaps between the flooring and baseboards were observed, suggesting that the wooden elements have experienced some shrinkage. The moisture safety strategy is deemed to have been generally successful. The overall experiences were important in the development of new recommendations in the SINTEF Building Research Design Guides for CLT structures.

ANALISIS EFEKTIVITAS PENGGUNAAN MATERIAL DINDING PADA PEMBANGUNAN GEDUNG BERTINGKAT

The development of science, especially in the field of construction, has produced various innovations, one of which is on wall materials that can support the effectiveness of work, especially in the construction of multi-storey buildings. It is realized that wall material can affect acoustic, thermal, and visual comfort levels. The choice of wall material has a direct impact on the environment where the use of environmentally friendly materials can reduce carbon footprint and construction waste. This study aims to analyze the effectiveness of the use of wall materials such as red brick, adobe and lightweight brick in terms of structural strength, cost and service life of the structure. To compare various alternatives, an assessment of each alternative consequence is carried out using a decision-making system. The results of the analysis showed that alternative 3 using lightweight brick obtained the highest value so that alternative 3 became the top priority of other alternatives to optimize the construction of high-rise buildings.

Reliability of multi-story buildings with load-bearing structures of cast reinforced concrete during the construction period

Reinforced concrete is considered to be one of the most reliable structural materials. For this reason, it is widely used for mass construction of buildings and structures in Russia and other countries. In particular, reinforced concrete is predominantly used in the construction of multi-story buildings of any design in all Russian regions at any time of the year. Improvements in technologies, construction management and mechanical aids increase the industrialization of construction. Although this fact is generally regarded as extremely positive, it reduces the time allowed for concrete to gain the required strength characteristics. Sometimes, loads from upper structures of buildings are applied to fresh, immature concrete. Obviously, specific technical decisions are required to intensify the concrete hardening process and create favorable temperature and humidity conditions for its curing. Russian science and practical experience have a large arsenal of effective technical means for solving these problems. However, these means are reluctantly applied in practice, since this entails a rise in construction costs, even though slight. This creates a situation when unacceptable loads from the higher floors are applied to the lower floors of the building. The structures perceive static loads rather than dynamic ones, including seismic loads, with an inertial mass of tens of tons, thereby causing a risky situation at the site. This happens en masse. The problem is even more complicated in winter time. During the period of concrete thawing in spring, the entire facility can be classified as being in a metastable state. The paper considers the production circumstances associated with the above situations and proposes recommendations for their prevention.

Analysis of Strategies and Implementation Methods for Time and Cost Efficiency in Multi-Story Building Construction Projects

The construction of multi-story buildings is increasingly rapid, with difficulty in managing and implementing multi-story buildings increasingly high. The longer the duration of time required will affect the costs to complete the project. Therefore, an implementation method is needed to support and consider the costs incurred in carrying out the work. In addition, by sharpening priorities, it is hoped that project management efficiency and activities will increase. All of this is to achieve the goals of a multi-story building project that meets the client’s needs. Different implementation methods in a building must be followed by exemplary project implementation and following the plan. Good technical management and implementation can reduce the risks of multi-story building construction projects and delays. It will reduce the development of project costs and will ultimately provide benefits for contractors. The method of implementing this multi-story building uses zoning and bottom-up methods. This method is expected to obtain time efficiency values. The implementation process is fast and obtains optimal costs.

A practical approach of partial striking technique in high-rise buildings

PurposeThis research proposes a viable method of slab and shore load computation for the partial striking technique utilized in high-rise construction projects to optimize the use of horizontal formwork. The proposed Partial Striking Simplified Method (PSSM) is designed to be utilized by industry practitioners to schedule the construction operations of casting floors in order to control the formwork costs incurred throughout the completion of a project.Design/methodology/approachThe article presents the PSSM for calculating slab and shore loads in multi-story building construction. It introduces the concept of “clearing before striking,” where shore supports are partially removed after a few days of pouring fresh concrete. The PSSM procedure is validated through numerical analysis and compared to other simplified approaches. Additionally, a user-friendly Python program based on the PSSM procedure is developed to explore the capability of the PSSM procedure and is used to study the variations in slab load, shoring level, concrete grade and cycle time.FindingsThe study successfully developed a more efficient and reliable method for estimating the loads on shores and slabs using partial striking techniques for multi-story building construction. Compared to other simplified approaches, the PSSM procedure is simpler and more precise, as demonstrated through numerical analysis. The mean of shore and slab load ratios are 1.08 and 1.07, respectively, which seems to have a slight standard deviation of 0.29 and 0.21 with 3D numerical analysis. The Python program developed for load estimation is effective in exploring the capability of the proposed PSSM procedure. The Python program's ability to identify the floor under maximum load and determine the specific construction stage provides valuable insights for multi-story construction, enabling informed decision-making and optimization of construction methods.Practical implicationsHigh-rise construction in Indian cities is booming, though this trend is not shared by all the country's major metropolitan areas. The growing construction sector in urban cities demands rapid construction for efficient utilization of formwork to control the construction costs of project. The proposed procedure is the best option to optimize the formwork construction cost, construction cycle time, the suitable formwork system with optimum cost, concrete grade for the adopted level of shoring in partaking and many more.Originality/valueThe proposed PSSM reduces the calculation complexity of the existing simplified method. This is done by considering the identical slab stiffness and identical shore layout for uniform load distribution throughout the structure. This procedure utilizes a two-step load distribution calculation for clearing phase. Initially, the 66% prop load of highest floor level is distributed uniformly over the lower interconnected slabs. In the second step, the total prop load is removed equally from all slabs below it. This makes the load distribution user-friendly for the industry expert.

PROSPECTS FOR THE USE OF ACTIVE ASPIRATION ALARM SYSTEMS IN FIRE SAFETY SYSTEMS OF MANY-STOREYED HIGH BUILDINGS

At present, multi-story high-rise buildings are becoming one of the most widely used buildings in cities. Now it is very difficult to imagine urban architecture without them. The increase in the urban population in cities is the result of an increase in the level of urbanization. As a result, the price of land increases due to the lack of free land in cities. Thus, the construction of multi-story buildings has become an inevitable solution to this issue, but this, in turn, has led to new problems. Depending on the purpose, composition, and number of technical systems, multi-story buildings are complex engineering and technical objects. On the one hand, the use of engineering and technical systems leads to an increase in the standard of living of people living standards, but they are also the main causes of new problems. For example, high-rise buildings are quite large consumers of electrical energy, both as objects and as subjects of these buildings, and this, in turn, leads to an increase in the likelihood of a fire in them. To prevent such undesirable cases, one has to use fire safety systems, one of the components of building automation. One of the main responsibilities of fire safety systems is to determine the initial stage of ignition and quickly detect its source, only, in this case, it can be eliminated or at least localized. The life and property of people can be protected. The main purpose of this article is to consider the currently unused active aspiration system in multi-story high-rise buildings as an alternative to currently used systems to improve efficiency in terms of fire safety. The article includes the appointment of an active aspiration system, the principle of operation, and the main characteristics, and functions of those designed for early fire detection. In addition, several options and a comparative analysis of an active aspiration system are considered to create a highly efficient fire safety system for high-rise buildings. Keywords: fire protection systems, smoke exhaust systems, fire protection sensors, aspirator alarm systems, automatic building systems.

ANALYSIS AND DESIGN REINFORCED CONCRETE CONSTRUCTION STRUCTURE OF 4 FLOOR HOTEL IN KUNINGAN

Planning for a 4-storey hotel in Kuningan is projected to support supporting facilities for the tourism sector in Kuningan Regency, supporting facilities like this are really needed by Kuningan Regency which has great potential in the tourism sector and is proven by the continuing increase in the number of tourists every year, with the development of Kuningan Regency and the increasingly widespread the construction of multi-storey buildings is needed planning in order to make efficient use of land. To support the availability of tourism support facilities, this research will examine the planning of hotel building structures based on SNI 2847-2019, SNI 1727-2020 and SNI 1726-2019 and calculate the budget plan for the structural work. Referring to these rules, the dimensions of the structural elements and the need for structural reinforcement can be produced that meet the rules and can also support the work force and loads received on a building including earthquake loads, wind loads and rain loads. The cost of building a 4-storey hotel building in this study is Rp. 26,712,400,000.00 (Twenty Six Billion Seven Hundred Twelve Million Four Hundred Thousand Rupiah), and the cost of building a one square meter building is Rp. 4,345,716.00 (Four million three hundred forty-five million seven hundred and sixteen thousand rupiah).

A Comparative Study on Seismic Analysis of Multistorey Buildings in Different Seismic Zones

The multi-story buildings are constructed to accommodate numerous residents in confined spaces due to the growing population and lack of available land. The population growth and industrial revolution caused a migration of people from rural to urban areas resulting in the need for the construction of multi-story buildings for both residential and commercial uses. The tall buildings, which are not adequately constructed to resist lateral stresses, result in the total collapse of the structure. Buildings that can withstand earthquake forces are created by considering different criteria such as the building’s inherent frequency, damping factor, kind of base, significance of the building and ductility of the structure. Because they have better moment distribution properties, structures designed for ductility need to be designed for lower lateral loads. To ensure safety against the seismic stresses of multi-story buildings, it is essential to understand seismic analysis in order to develop earthquake-resistant structures. Both a regular moment resisting frame and a special moment-resisting frame were taken into account for the seismic study. In the present study, a G + 8 storey reinforced concrete (RC) structure in three different seismic zones was compared in terms of percentage longitudinal steel, reinforcement details, and design base shear. The structure was examined for seismic zones III, IV, and V in accordance with the guidelines of IS 1893 (Part 1): 2016. Results showed that base shear increased with the change in the seismic zone from III to V.

Analysis of existing methods for calculating retaining walls from bored piles

An overview analysis of the methods of calculating retaining walls from driven piles was performed. Analytical calculation of piles in accordance with SNiP 2.02.03–85, calculation taking into account the requirements of change No. 1 DBN V.2.1-10-2009 on the calculation of horizontal stiffness of piles and static calculation of the section using the Lira-CAD software complex were considered, and calculation of a plane cross-section using the finite element method according to the Coulomb-Mohr model in the Plaxis 2D software complex.With population growth and the expansion of cities, the need for new residential, commercial and industrial buildings increases. Modern urbanization leads to an increase in the population density and densification of buildings. This requires the construction of multi-story buildings and infrastructure to ensure efficient use of the limited land area, construction on areas with significant elevation differences, or the construction of underground parking lots. Under such conditions, engineers increasingly have to solve construction problems in the conditions of compacted buildings, or in conditions of significant differences in the height of the building site.One of the most common engineering solutions to solve these problems is the implementation of massive retaining walls in the soil in the form of bored piles connected by a binding grid. The calculation of such structures requires special attention to the determination of the initial parameters of the considered problem and the choice of an approach to the calculation and analysis of the stress-strain state of the elements of the pit enclosure structures and the base.On the example, the calculation of the pile was performed in the engineering and geological conditions of the city of Kyiv with the same calculation parameters and different calculation methods. For the reliability of the comparison of loading results for all three cases, it was accepted according to DSTU NB V.2.1-31:2014. The obtained movements of the piles at the level of the bottom of the pit and the top of the pile were analyzed in three ways, and based on them, preliminary conclusions were formulated with prospects for further research.

Capacity Analysis of Variation Emulative Precast Beam-Column Joints with Finite Element Method

The construction of multistory buildings is currently increasing rapidly. Optimal construction methods are needed particularly in the construction of high-rise buildings. There are two construction methods for multistory buildings that are currently developing, cast-in-place and precast methods. Beam-column joint is important things in both construction methods. In precast systems, the element components and planning affect the structural performance and overall design. Beam-column joint capacity and performance of a plastic hinge relocation method needs to be tested. Testing of the cruciform beam-column joint was carried out using the nonlinear finite element method and compared with the results of laboratory test data. There are 8 beam-column joint models with 2 of them not using plastic hinge relocation method. The results of beam-column joint capacity analysis from manual and finite element methods at yield condition generally give smaller values with a difference of 0,17% - 8,32% than the reference data. While at the ultimate condition, the beam-column joint capacity of the finite element analysis produces a greater value with a difference of 0,52% - 13,83%. The yielding of reinforcement in each model occurs in the predetermined relocation area especially for CBJ90, CBJU and CBJR models.

A genetic algorithm framework for time-efficient reinforced concrete work in multi-story building construction with partial striking technique

The construction of multi-story buildings is a complex process that requires careful consideration of time and safety. This research study aims to optimize the reinforced concrete (RC) work duration in multi-story building construction while maintaining safety through a Python program integrated with a genetic algorithm. The methodology involves analyzing the slab and shore load distribution at each construction stage and identifying factors that influence the RC work duration. A genetic algorithm optimizes RC work duration using sensitivity analysis. The study found that RC work duration is influenced by stripping time, cycle time, and the levels of shoring used. The minimum striking time for M50 concrete grade is one day. When the cycle time is 6–8 days, the required minimum level of shoring is two, but it increases to four for a lower cycle time of 3 days. The study recommends M35 grade concrete for the best shoring combination, prioritizing safety. The study's originality lies in the development of a Python program that optimizes the RC work duration for the partial striking construction method. Its practical applications can help construction companies to streamline their construction process, manage their construction time more effectively, and improve project outcomes.

A Hybrid Multi-Criteria Decision Support System for Selecting the Most Sustainable Structural Material for a Multistory Building Construction

In recent years, the performance of the construction industry has highlighted the increased need for better resource efficiency, improved productivity, less waste, and increased value through sustainable construction practices. The core concept of sustainable construction is to maximize value and minimize harm by achieving a balance between social, economic, technical, and environmental aspects, commonly known as the pillars of sustainability. The decision regarding which structural material to select for any construction project is traditionally made based on technical and economic considerations with little or no attention paid to social and environmental aspects. Furthermore, the majority of the available literature on the subject considered three sustainability pillars (i.e., environmental, social, and economic), ignoring the influence of technical aspects for overall sustainability assessment. Industry experts have also noted an unfulfilled need for a multi-criteria decision-making (MCDM) technique that can integrate all stakeholders’ (project owner, designer, and constructor) opinions into the selection process. Hence, this research developed a decision support system (DSS) involving MCDM techniques to aid in selecting the most sustainable structural material, considering the four pillars of sustainability in the integrated project delivery (IPD) framework. A hybrid MCDM method combining AHP, TOPSIS, and VIKOR in a fuzzy environment was used to develop the DSS. A hypothetical eight-story building was considered for a case study to validate the developed DSS. The result shows that user preferences highly govern the final ranking of the alternative options of structural materials. Timber was chosen as the most sustainable option once the stakeholders assigned balanced importance to all factors of sustainable construction practices. The developed DSS was designed to be generic, can be used by any group of industry practitioners, and is expected to enhance objectivity and consistency of the decision-making process as a step towards achieving sustainable construction.

The Application of Lean Construction Concept in Multi-Storey Building Construction Project

Every construction project cannot be separated from various obstacles or failures. For this reason, it is necessary to improve planning using the lean construction method. The problem in this research is how to apply lean construction concepts, what factors can cause waste, and whether there are significant differences between the perceptions of contractors, supervisory consultants, and owners on the factors that cause waste to occur in fire station building construction. The purpose of this study was to analyze the application of lean construction and analyze the factors that cause waste and the differences between the perceptions of contractors, supervisory consultants, and owners. This study employs both quantitative and qualitative methods. Based on the analysis of observations made, the application of lean construction that was reviewed has started to be implemented, and there are some that have not been implemented properly, such as checking for safety, increasing visualization, and first run studies, so that it can cause waste. Descriptive analysis shows that only a small part of the waste factor with data interpretation intervals is found, namely waiting time for instructions. The results of one-way ANOVA analysis showed that there is no significant difference between the perceptions of contractors, supervisory consultants, and owners of the factors that cause waste.

A new concept for large additive manufacturing in construction: tower crane-based 3D printing controlled by deep reinforcement learning

PurposeMost of the 3D printing machines do not comply with the requirements of on-site, large-scale multi-story building construction. This paper aims to propose the conceptualization of a tower crane (TC)-based 3D printing controlled by artificial intelligence (AI) as the first step towards a large 3D printing development for multi-story buildings. It also aims to overcome the most important limitation of additive manufacturing in the construction industry (the build volume) by exploiting the most important machine used in the field: TCs. It assesses the technology feasibility by investigating the accuracy reached in the printing process.Design/methodology/approachThe research is composed of three main steps: firstly, the TC-based 3D printing concept is defined by proposing an aero-pendulum extruder stabilized by propellers to control the trajectory during the extrusion process; secondly, an AI-based system is defined to control both the crane and the extruder toolpath by exploiting deep reinforcement learning (DRL) control approach; thirdly the proposed framework is validated by simulating the dynamical system and analysing its performance.FindingsThe TC-based 3D printer can be effectively used for additive manufacturing in the construction industry. Both the TC and its extruder can be properly controlled by an AI-based control system. The paper shows the effectiveness of the aero-pendulum extruder controlled by AI demonstrated by simulations and validation. The AI-based control system allows for reaching an acceptable tolerance with respect to the ideal trajectory compared with the system tolerance without stabilization.Originality/valueIn related literature, scientific investigations concerning the use of crane systems for 3D printing and AI-based systems for control are completely missing. To the best of the authors’ knowledge, the proposed research demonstrates for the first time the effectiveness of this technology conceptualized and controlled with an intelligent DRL agent.Practical implicationsThe results provide the first step towards the development of a new additive manufacturing system for multi-storey constructions exploiting the TC-based 3D printing. The demonstration of the conceptualization feasibility and the control system opens up new possibilities to activate experimental research for companies and research centres.

Factors Influencing Choice of Wooden Frames for Construction of Multi-Story Buildings in Sweden

Construction of buildings with wooden frames higher than two stories has been permitted in Sweden since 1994. As construction of multi-story buildings with wooden frames is relatively new, people in the construction industry are more likely to construct these buildings with concrete frames. The current research evaluates the factors influencing the choice of wooden frames for construction of multi-story buildings in Sweden. The purpose of this study is to explain which advantages and disadvantages construction companies in Sweden consider with wooden construction and to highlight the factors for why multi-story buildings are built with wood to a lesser extent than with other materials. The main goal is to investigate what factors or assumptions construction companies base their decisions on, and whether experience and competence in wooden frames for construction of multi-story buildings are considered in short supply in Sweden today. The chosen method for this research is a descriptive survey study with a qualitative and quantitative approach. The survey is based on respondents from five leading building companies in Sweden with regard to the companies’ revenue. The respondents had either previous experience in constructing multi-story buildings with wooden frames, experienced respondents (ERs), or no experience, unexperienced respondents (UERs). 63% of the respondents were ERs, while 37% of them were UERs. It is resulted that the respondents think there is a lack of competence and experience in wooden frames for construction of multi-story buildings in Sweden. Factors that have the greatest impact on decisions to construct with wooden frames are positive environmental and climatic aspects as well as production advantages. Factors that are considered as major obstacles to construct with wooden frames are cost, acoustics, and moisture problems.