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Danner, W.F. and Leppanen, P.

A case study of the conceptual product modelling of buildings: Prefabricated Reinforced Concrete Structure

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Series: w78:1990 (browse)
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Duarte J P

Introducing cam technologies in pavicentro housing production system

Abstract: Pavicentro is a Portuguese factory that mass produces prefabricated houses based on a concrete box system. Among the goals that directed the development of this system were concerns for quality and customized production. Nevertheless, while quality improved, the initial concern for customization soon faded into common mass production. The paper points out the opportunity provided by CAD/CAM technologies to develop a truly customized mass production process. Such a process would extend design diversity and enhance design quality, thus increasing customer satisfaction. The paper identifies areas of production with a greater potential for the introduction of CADICAM, which are related to the production of secondary elements, including precastconcrete and nonconcrete elements.

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Series: ecce:1997 (browse)
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Hannus M, Jarvinen H, Astrom G

Exchange of product data of prefabricated concrete structures

Abstract: As part of efforts to adopt manufacturing automation in a scattered organizational structure the Finnish precast concrete industry has initiated the development of a number of solutions for data exchange. Guidelines concerning various aspects of using computers in the design/manufacturing process were defined in a manual which was widely distributed to involved parties. Standardized neutral file formats for data exchange between dissimilar computer systems were developed for three kinds of data: 1) drawings, 2) tables (e.g. bills of materials) and 3) product model -based data. Translator programs were developed for a number of common CAD-systems as well as a set of software tools to the users of standardized exchange files and software developers. The result of these developments have been widely adopted by fabricators, designers and software developers.

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Full text: content.pdf (894,706 bytes) (available to registered users only)

Series: w78:1991 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.software-software (0.038792) class.represent (0.028338) class.impact (0.015560)
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Permission to reproduce these papers has been graciously provided by Eindhoven University of Technology.


Helena Johnsson, Linus Malmgren, Stefan Persson

ICT support for industrial production of houses Ė the Swedish case

Abstract: The Swedish construction sector is currently undergoing great changes. The large costs for labour have forced the construction companies to rationalise and minimise labour intense work operations. Therefore, the current trend in construction to adopt the principles of lean production and transform it into lean construction, suits the Swed-ish way of working and the entire Swedish construction sector has caught on. A growing market is the prefabrication of building elements that are transported to site and then erected. The development has been taken so far that modular houses i.e. vol-umes/rooms are prefabricated. Companies in the prefabrication industry within construction fall between two sectors; the construction industry and the manufacturing industry. In terms of IT support the contradiction between the two sectors become evident. Software developed for the construction sector seldom provide enough detailing to suffice as a basis for industrial production, while software supporting the manufacturing industry are incapable of delivering standard construction documenta-tion. The current study presents a multiple case study where six Swedish industrial manu-facturers of timber houses were studied. The process from tender acceptance to mod-ule delivery is described. Alongside, a survey of the building sys-tem revealed that much still needs to be done in terms of documenting a building system. The results show that the ques-tion of IT support is more a question of consequent information strategies than eloquent IT tools. The pressing need for a method for documenting building systems is stressed and different methods are discussed.

Keywords: timber houses, industrial construction, lean construction, timber buildings

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Series: w78:2007 (browse)
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Hengwei Wang, Jiarui Lin and Jianping Zhang

Operation-Level 4D Modeling and Visualization for Modular Building Based on Standard Activity Library

Abstract: Modular or prefabricated building plays an important role in lean construction and green building. Building information modeling and 4D bring a new paradigm for data modeling and visualization in the Architecture, Engineering and Construction domain. Meanwhile, lots of time was consumed when modeling and visualizing the dynamic construction process based on 4D. It takes more time to create an operation-level 4D model for technical specification, that always adopted to ensure the quality and safety. Given that modular or prefabricated building projects have lots of similar construction activities, this paper proposed a 4D modeling and visualization approach for modular building, which can persist generalized construction activities and operations in standard activity library and fully utilize them in schedule detailing and visualization. The approach is designed and applied based on previous researches and applications of 4D BIM and has been used in a practical project of modular residential project to illustrate the feasibility of the work and the possibility of future research.

Keywords: 4D Modeling, Operation Level, Building Information Model, Modular Building, Prefabricated Building

DOI: https://doi.org/10.24928/JC3-2017/0287

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Jardim-Goncalves R, Sousa P, Pimentao J, Steigergarcao A, Grilo A, Tadeu L

Integration of planning and control activities for building and construction: experiencing standards

Abstract: The effective exchange of information regarding the planning and control activities (schedules, resources, materials, cost, cash flow) between the different parties involved in building and construction projects is a critical success factor to avoid projects' time and costs overrun and to insure better quality. However, current applications and research and development efforts on electronic exchange of information are usually restricted to the exchange of technical design information, particularly CAD exchange amongst designers and between these and contractors; and of business data (purchase orders, invoices, remittance advice, etc.), between contractors and builders, merchants and suppliers. This paper will review current practitioners' approach to the exchange of planning and control information, and discuss the business need to the seamless flow of scheduling, resource, materials, and cost information between firms. Different technical solutions available to address the subject will be described. Through the description of the experience in this area of two European projects, RoadRobot and SUMMIT, the paper will also describe the state-of-the-art regarding the development of international standards for the exchange of planning and control information, particularly at the EDIFACT, STEP and IAI levels. RoadRobot - Operator Assisted Mobile Road Robot for Heavy Duty Civil Engineering Applications, was a project devoted to implement a general standard-based architecture to support the information management for road construction environments, covering from the road design to road construction, embracing the site, cell, machine and tool levels. SUMMIT - Supply Chain Management In Construction Industry, is an end-user driven project which envisages the creation, implementation, test and evaluation of an EDI, STEP and IAI/IFC based communication infrastructure on a specific project of building prefabricated houses, connecting project manager, contractor and suppliers. This paper shows that international standards for planning and control information in B and C are not yet enough developed and that further developments are required.

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Full text: content.pdf (90,394 bytes) (available to registered users only)

Series: w78:1999 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.strategies (0.016652) class.software-machine (0.015641) class.commerce (0.015140)
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Permission to reproduce these papers has been graciously provided by the Research Press of the National Research Council of Canada. The support of the editors, particularly Dr. Dana Vanier, is gratefully appreciated.


Kovacic I, Duhovnik J, Dolenc M, Marolt V

Object oriented program for design of prefabricated concrete structures

Abstract: The paper describes the program MONCAD for design of the prefabricated concrete structures. The program was developed in the AutoCAD - ARX environment using the object oriented data base management system PO and the program language C++. The program enables geometrical modelling, structural modelling, structural analysis, and proportioning of the reinforced and prestressed concrete elements of multistorymultibay structures which consist of cantilever columns with foundations, beams, and deck elements of several shapes. This kind of structures has been often used for industrial and commercial buildings.

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Series: ecce:1997 (browse)
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Nollau C, Hauser M, Scherer R J

Information retrieval - a concept of an engineering database server for prefabricated elements

Abstract: A concept for an engineering database server for retrieving information on the use of prefabricated elements will be discussed. The methods for the re-use of design solutions stored in this structural library are based on database technologies for a client-server architecture and advanced concepts of object-oriented modelling techniques. The objective is to optimise the cognitive effort in the early design stage by actively supporting the choice and adaptation of a structural solution depending on the constraints of the design situation. Because of the great number of prefabricated concrete slab floors used in construction we have chosen this very promising domain to demonstrate our model.

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Full text: content.pdf (59,694 bytes) (available to registered users only)

Series: w78:1996 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.analysis (0.037184) class.retrieve (0.033616) class.software development (0.025024)
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Permission to reproduce these papers has been graciously provided by the University of Ljubljana. The assistance of the editor, Prof. Ziga Turk, is gratefully appreciated.


Panshin, L.L.

Computerized Methods of Structural Limit State Design of Prefabricated Public Buildings

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Full text: content.pdf (728,166 bytes) (available to registered users only)

Series: w78:1986 (browse)
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Patrik Jensen, Thomas Olofsson, Marcus Sandberg, Linus Malmgren

REDUCING COMPLEXITY OF CUSTOMIZED PREFABRICATED BUILDINGS THROUGH MODULARIZATION AND IT SUPPORT

Abstract: Many companies in Sweden using prefabricating strategies are currently meeting the ever increasing customer requirements with ad-hoc solutions that do not fit their production system. This is causing bottlenecks and lower profit margins as a consequence. One solution to the problem is to re-engineer their building systems according to modularization principles used in the manufacturing industries, which have adapted their production to be able to meet mass-customization.This paper describes the first part in study of modularization of building systems and if methods used in the manufacturing industry can be adapted to the building industry. The Swedish construction industries using prefabrication strategies are mainly project oriented, and needs to develop a more product oriented development process to benefit from the values that modularization can give. It is also obvious that it is impossible to introduce modularization methods used in manufacturing industries if design requirements are incomplete or changing from project to project. It is therefore essential that the product owner owns the whole process as well. Varying customersí demands can to some extent be handled using modularization principles. However, we donít believe that one solution fitís all; therefore it is essential to target a specific segment of the market. The cost for the development of such modularized building system for the targeted segment of customer must be evaluated against the possible market share.

Keywords: Modularization, standardization, prefabricating, Quality Function Deployment (QFD), Modular Function Deployment (MFD)

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Full text: content.pdf (358,284 bytes) (available to registered users only)

Series: w78:2008 (browse)
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