1
Over Six years of experience in Structure field, Design different types of Structures Building, BIM Modeling with capability for efficient use of computerized software related to Structure field.
B.Sc., Civil Engineering, Helwan University, Egypt, 2005, M.Sc.In Reinforced Concrete, Faculty of Engineering, Helwan University (on going).
Member of the Egyptian Egyptian Syndicate of Engineers Engineers and Member of British institute of civil Engineers.
Structural and BIM Engineer at Dar al-Handasah Company , Approved technical instructor for Revit Structure .
Deputy Project Manager/technical manager of University To Work initiative at ECG, (This initiative aims to produce world class skilled students among Egyptian universities and qualified them by developing their technical and soft skills and molding their character to comply with market needs).
2
Foreword The future of the design and construction industry is going to be driven by the use of technology and for Today's challenges for the industry “Complex projects, tighter
budgets and deadlines, Internal and external collaboration, Information overload and Project risks “. The best example emerging today is the use of three-dimensional, intelligent design information, commonly referred to as Building Information Modeling (BIM). BIM is expected to drive the construction industry towards a “Model Based” process and gradually move the industry away from a “2D Based”
process, This “Model Based” process where buildings will be built virtually before they get built out in the field is also referred to as Virtual Design and Construction (VDC). This guide is for contractors who recognize this future is coming and are looking for a way to start preparing themselves so that when the future arrives, they will be ready. This guide is intended to help contractors understand how to get started.
3
Definition of BIM Unfortunately, there is currently no industry standard agreed definition of BIM , the definition of BIM is best described by Graphisoft, which describes BIM as three separate but linked activities:
Building Information MODELLING Is a business process that allows all stakeholders to have access to the same information at the same time through seamless interoperability between technology platforms. Building Information MODEL Is the output of the business process, a virtual computer model of a project that holds selected data (e.g. design, quantity, time, cost, asset etc). Building Information MANAGEMENT Provides the benefits that can be divided from The Building Information Model. These include centralized and visual communication, sustainability, efficient design integration of other disciplines, site control, as built documentation etc.
4
5
The "I" in BIM is sometimes even more compelling in BIM, think about cost estimating test, think about specification writing, think about energy load analysis, think about heating and cooling, think about structural loads, all this things require data, we have this data instead of manually computing all of this various things that we need to get a paper design, why not let the computer do while computer do best?, so this is what BIM is all about, again let's focus just in "M", let us also think about the "I" and if we have got the two together and fully coordinate the package in a way that Revit would give us, then what we have got is a fully implemented BIM solution Buildings are more complex than ever before. Documentation sets span all disciplines, and are hundreds of pages long. The numbers of people that will touch a set of drawings —to produce them, evaluate them, or use them to build the building—have become huge. Integrated building systems continue to expand with the growth of technology. Today, we have more security, electrical,
data, telecom, HVAC, and energy requirement than ever before.
6
Building Information Modeling or “BIM” brings wi th it many advantages for the digital design of buildings. Yet with BIM comes issues and risks that a design professional must consider. Enhanced usage of electronic design and construction processes holds promises for saving Time and money, reducing claims and increasing the quality of performance, especially on complex projects. One must consider and recognize however the individual risks associated with this new process. Building information modeling supports the
continuous and immediate availability of project design scope, schedule, and cost information that is high quality, reliable, integrated, and fully coordinated.
A brief history of BIM 1970 BIM term first used 1982 First version of AutoCAD released and Graphisoft founded 1983 First version of AutoCAD for Windows released 1985 Bentley founded 1987 First version of Graphisoft’s ArchiCAD released
1997 Revit founded, First version of IFC released 1999 Revit first released 2002 Revit bought by Autodesk 7
WHERE WE ARE?
8
Stage 0 – 2D Documents 0A Manual drafting 0B CAD 2D drafting Stage 1 – Modeling 1A 3D CAD modeling 1B intelligent 3D modeling Stage 2 – Collaboration 2A One-way collaboration 2B Two-way collaboration Stage 3 – Integration 3A Local server 3B Web-based server 9
Building Information Modeling Benefits:
Building information modeling supports the continuous and immediate availability of project design scope, schedule, and cost information that is high quality, reliable, integrated, and fully coordinated. Among the many competitive advantages it confers are:
10
Increased speed of delivery (time saved).
Better coordination (fewer errors).
Clash Detection enables effective identification, inspection, and reporting of interference clash in a 3D project model between various 3D solid objects. Using Clash Detection can help you to reduce the risk of human error during model inspections. inspections.
11
Decreased costs (money saved)
BIM makes it easier to estimate quantities of materials needed for a project which reduces waste and saves money. Material waste in the construction industry has been studied by the Construction Industry Institute and Lean Construction Institute who have found that waste accounts for 57% of money lost in the construction industry and 26% in the manufacturing sector. This 2008 data shows that there was a $400 billion aggregate loss resulting from such factors as miscommunication among project partners and informational inaccuracies which BIM can catch and prevent.1 Thus the construction industry is starting to implement BIM and building owners as well can reap the benefits.
Greater productivity.
BIM assists to incorporate facility performance with user assessments. The results from user assessment studies 12
and instrument measures of the physical condition of the building can easily be allotted on floor plans utilizing geographic information systems. The construction firms may link these data to their geographic information systems for future planning and design purposes.
Higher-quality work. work.
BIM provides object-oriented models with rich semantics and relationships encoded, supporting the automated analysis of the performance of building products and designs.
This
basically
leads
to
improved
design,
implementation and management at all stages of the building’s life cycle.
13
BIM afford manufacturers, designers and integrators advantages in design efficiency and quality control. A single, connected model improves communication within the design and construction teams and the parametric elements of the model create a robust database. The Building owner and facility manager can utilize the data within the model during the Occupation of the building. Harvesting the information in that database can help everyone be more efficient and also create new opportunities for revenue expansion.
14
Benefits to clients & contractors:
How can we persuade clients that BIM is worthwhile?
BIM Benefits are :
improved design reliability
reduced design risk
reduced waste
enhanced co-ordination
fewer errors
15
improved decision making greater productivity
better quality of output
supports sustainability
improved safety
quantity takeoffs
enhanced communication
effective resource utilization and co-ordination of activities
potential for downstream uses for facilities management
understanding of design intent improved spatial co-ordinatio co-ordination n
improved client engagement
better visualizations
ability to provide software free walk rounds to others
more reliable and consistent schedules ability to identify clash detections more easily eas ily greater team ethic
improved environmental analysis earlier in the design
ability to export to other software to review
program against model less time documenting and more time designing
16
less surprises
better and more well considered designs
more time to get the design right
easier understanding for lay persons
better outputs including three dimensional documentation
earlier problem resolution better calculations at all stages of the project improved delivery of client vision
creation of better environments
reduced litigation
ability to deliver more complex solutions in less time
forecasting for the whole life of the project
easier to carry out design reviews
What Technologies Can Be Used to Implement
Building Information Modeling?
Although building information modeling is an approach and not a technology, it does require suitable technology to be implemented effectively. Examples of some of these technologies, in increasing order of effectiveness, include CAD Object CAD Parametric building modeling 17
The figure preceding shows the overall effectiveness or benefit level of each of these three different technologies (vertical axis) measured against the effort required to achieve those benefits (horizontal axis). In addition, the horizontal dashed line represents the minimum degree of effectiveness that can be properly characterized as building information modeling. Below this building information modeling threshold are existing, traditional industry processes that are wellsupported by traditional drafting and task automation. Above this line are increasing degrees of building information modeling effectiveness. The three solid lines show the effectiveness achievable at a given level of effort using these three different technologies. 18
CAD Technology The gray line in the chart represents CAD-based software; that is, software that is based on the familiar geometry-based CAD technology used in the industry for several decades. This technology supports drafting automation very effectively and with little effort —better than any other technology, in fact. However, to achieve increasing levels of efficiency, this technology requires greater and greater levels of effort. Higher levels of administrative and management overhead are introduced, layer and naming standards must be maintained and Enforced, and the quality of the information coming from the CAD-based files depends heavily on the discipline and reliability of the users entering the data. Very high levels of effort, including programming and partner product development, can achieve effectiveness in the building information modeling range. However, the level of effort required is so high that CAD-based technology is rarely used at this level.
Autodesk CAD Technology AutoCAD® software is an example of a product based on CAD technology. With enough discipline and some programming effort, it can be used to deliver some of the benefits of building information modeling. Few examples of this kind of use exist, but certainly the third-party scheduling, facility management, cost estimating, structural design, and 19
similar applications that have been built on the AutoCAD platform are examples of building information modeling applied to specific slices of the building industry.
Object CAD Technology The blue line on the chart represents software based on object CAD technology. Object CAD seeks to simulate building components in a CAD-based environment, focusing on the 3D geometry of the building, the generation of 2D documentation from that 3D geometry, and the extraction of object data from the building components to provide information about quantities and object properties. This technology has been applied in both multiple-file-based and single-file-based implementations, and is sometimes referred to as a “single building model” or some type of “virtual model.” This technology can be applied very effectively to help coordinate the various representations of the building in documentation, and because it carries rich data about the building in the object structure, it can also be extended into building information modeling. This technology is well-established in design and documentation software today, and all but one of the building information modeling implementations implementations in the industry to date have been based on this technology. Object CAD technology also allows for great variety in levels of use, and because it is based on CAD, it can be particularly easy to implement —and often yields immediate benefits —with little or no process change. However its effectiveness remains contingent on user discipline and reliability, and it cannot ensure the presence of 20
the high-quality, reliable, integrated, and fully coordinated information required for the highest levels of building information modeling benefits.
Autodesk Object CAD Technology Autodesk® Architectural Desktop and Autodesk® Building Systems are examples of software built on object CAD technology, adding intelligent architectural and engineering objects to the familiar AutoCAD platform. These products can be used to deliver building information modeling benefits with significantly less effort than AutoCAD. Since they are built on AutoCAD, however, they can also be used very productively as design and documentation tools for CADbased processes unrelated to building information modeling, and that is how many of our customers use them.
Parametric Building Modeling Technology The orange line on the chart represents parametric building modeling technology. Parametric building modeling is analogous to the decision support systems used in the financial community. These systems combine a data model (geometry and data) with a behavioral model (change management) that gives meaning to the data through relationships. This provides an integrated system that can be used to simulate the behavior of a real-world system —in this case, a building. Examples of the most advanced features of this kind of system are real-time self-coordination of the information in every view, and the assurance of the quality of 21
the information coming from the system. Some other important characteristics of software based on parametric building modeling technology include: • Information about the entire building and a complete set of design documents are stored in an integrated database. All of the information is parametric and therefore completely interconnected. • Any change to the relationships among objects is always instantly reflected throughout the rest of the project —in all representations of the project. • All relationships within the model are available for user definition—not just relationships (such as a window hosted by a wall) that have been preprogrammed by the developers. This includes graphical definition by the end user of parametric objects. Just as a spreadsheet is a tool for thinking about numbers, software built on parametric building modeling technology is a tool for thinking about buildings. And just as a change made anywhere in a spreadsheet is expected to update everywhere with no further intervention from the user, so a change made anywhere in a parametric building modeler is immediately reflected everywhere. Current file-based CAD and object CAD tools may be used to some degree to support building information modeling, but require myriad supporting technologies and the aggregation of information across diverse, independent applications. Only a purpose-built integrated data architecture built around a parametric building model can provide the immediate and fully coordinated representation of a project across all views, 22
drawing sheets and schedules that is necessary to eliminate errors and provide clarity and confidence in decision making. Autodesk offers products based on all three building design and documentation technologies, and fully understands the pros and cons of each. As shown on the chart, parametric building modeling technology is uniquely suited to supporting the highest level of building information modeling effectiveness at the lowest level of effort. Parametric building modeling uniquely offers the concurrent and immediate availability of all of the important information about the building that results in higher quality work, greater speed and productivity, and decreased costs. However, as also shown on the chart, this technology requires the wholesale adoption of building information modeling to put it to use. There is no way to use this technology in a traditional, non-building information modeling environment. Using this technology can deliver tremendous business benefits, but doing so requires a departure from traditional ways of working. Moving from CAD-based technology to object CAD technology can be an incremental or evolutionary change, but moving to parametric building modeling technology for building information modeling requires a new way of working.
23
Autodesk Parametric Building Modeling Technology Autodesk® Revit® software is an example of parametric building technology. It is purpose built for building industry professionals ready for a new way of working and the correspondingly high level of building information modeling benefits that go with it. Unlike the evolutionary path of Autodesk Architectural Desktop, Revit is inherently a building information modeler, and there is no effective way to use Revit in any other way. It delivers only a fully integrated, self-coordinating building information model. Because the building industry relies heavily on graphical information, some aspects of these three technologies appear similar at the presentation level. All of them capably represent building plans, sections, and elevations for example. But the underlying capabilities are Entirely different, in the same way that the presentation of data on an interactive report form driven by a database can look similar to a word-processing document .What is driving each presentation, however, is fundamentally different.
24
The Power of BIM
Parametric Change Management The Parametric flexibility offered in Revit is compelling. During the design process, Revit Architecture’s parametric change management automatically keep the architectural 2D drawings updated with the integral 3D model, resulting in early phase collision detection and generating high-quality, photo-realistic design visualizations.
3D Environment 3D models provide far more effective communication of design intent than 2D apps. Unlike 2D application, 3D model provides high resolution view. When you encounter a design conflict that requires complex resolution, you can zoom the critical parts including facade, joint sections, supporting structure, etc. and have a closer look all around.
Compatibility of File Import-export Revit can import, export and link varied types of files including DWG, DGN, etc.
25
Automated 2D Floor Planning Tools Floor planning is the pivotal component in a construction document set. Revit's smart building components and 3D symbol expedite floor planning and schedules. A typical CAD program can't match the quality and speed of Revit's floor planning tools.
Automatic Sheet Set Management Revit automatically scales dimensions, text, annotation tags, line types and hatch patterns based on the viewport's scale. As sections, elevations, details are placed on a sheet they are automatically numbered and their reference labels are updated in the plans, sections or elevations that reference them.
Optimization of Schedule and Cost Once the developer obtains a Bill of Quantities (BOQ) either using quantity takeoff or from a standard library, Revit enables them to prepare accurate project estimates with a detailed rate analysis process, manage tenders, administer the contract, manage formal change orders, conduct field inspections and finally closely track construction to determine whether it is on schedule and adheres to budgets.
26
BIM For Architectural Building Information Modeling or BIM creates flawless integration between design, engineering, analysis, construction, and operations for the complete lifecycle of facilities. Architects and Designers get unrestricted freedom to discover more design options for producing more improved & informed design decisions, and to forecast costs and performance. With the help of BIM technology the computer tells the designer when he has placed a wall in the middle of a window as the pieces used to assemble the building modelthe floors, walls, roofs, doors, windows, and other components-have been programmed to "know" what they are. BIM can be used to express the quantity of the building materials and their costs after the final design is completed. BIM can mechanically coordinate all design and construction documents and this leads to eliminate errors and omissions. The architectural and AE firms are well positioned to deliver better buildings in scheduled time and within budget to get more revenue. The architects can visualize complex derivatives and geometry of entire scheme as BIM creates complex and integrated models easily. BIM, maintains coordination and consistency all through the design development phase and any alteration within the project will consequence updating of related drawings and documents. All Meta data (non-geometric information) like list of materials used, Bill of quantities, doors and windows 27
schedule , etc, are automatically generated from a BIM model. These Meta data are utilized directly for reports devoid of cross-verification. Engineering firm utilize BIM to analyze late changes smoothly and rapidly return the data to the architect for examination.
BIM For Structural BIM can easily explore & examine all the structural design alternatives with flexible interdisciplinary coordination. The structural engineers can easily accommodate with a late change and reduce the disruption of frequent or late changes in the project. Building information model provides the functional relationships among building elements and systems that range from walls, beams, ducts, pipes, distribution panels etc. By applying BIM in their project structural professionals can coordinate design intent, structural performance and execution and build high performance building. BIM with its parametric change management eliminates errors and at the same time automate the communication of changes between the partners in the AEC process. A change occurred to any parameter or element in the design is immediately replicated in every representation of that element in the design along with the right technology, bi-lateral links with obtainable 28
specialized tools for analysis. Any other parameters that are linked to the change are also changed suitably. This result in improving quality as not engineers can rely on the results as well as design team partners also count on the information supplied to them to be the best possible quality. BIM models can be utilized for multiple third-party analysis and this will lead to greater gains in documentation, drawing production and co-ordination, and integration of design changes. The structural engineers can save a huge time over a 2D workflow as BIM can automate and coordinate the formation of construction documentation across a project. The construction documentation can be customized without any difficulty allowing for incorporation of standards. BIM creates virtual structural model which can be applied for coordination with architects, mechanical, electrical, and plumbing engineers, and civil engineers. That same digital model is incorporated with analysis, design, and construction documentation, and is utilized as the basis for digital designto-fabrication strategies and construction. With BIM, structural engineers are able to track material quantities and search design options that leads to a more sustainable design. BIM empower structural engineers to examine building design options for long term application and future flexibility, 29
maximizing design competence and minimizing waste and overall embodied energy. BIM generates rich intelligent information that can be utilized for simulation and analysis. This facilitates structural engineers to provide informed decisions and optimize the structure for stability, flexibility and long term use.
BIM For MEP
Creation of Virtual Intelligent 3D Model We generate 3D Model which proficiently and flawlessly unites the geographic information, 3D geometry, spatial relationships and characteristics for demonstration of HVAC, Electrical and Plumbing layout and connections inside the buildings.
Scheduling We show the scheduling of various activities of HVAC, Electrical and Plumbing services along with their criticality and slack periods. Most design parameters for MEP systems are available for scheduling. Create multiple types of customized schedules (for example, lighting schedules, and mechanical and electrical equipment schedules) that are linked to your BIM Models Systems model.
30
Mechanical HVAC Space Design Create room color-fill plans by using design parameters to communicate design intent. Visually to quickly facilitate design reviews and present your design criteria to clients c lients for review and validation.
Mechanical Duct and Pipe System Modeling Mechanical functionality offers 3D modeling for ductwork and piping to create HVAC systems. s ystems. Intuitive layout tools make 3D modeling fast and easy for even the first-time user to master. Easily modify the model by dragging design elements to move or change them on the screen, s creen, in almost any view. All model views and sheets update automatically whenever a change is made anywhere for accurate and coordinated designs and documents at all times.
Plumbing System Modeling Gain full 3D parametric modeling of plumbing system layout with BIM Models MEP. The software automatically places all risers and drops as you design your plumbing system. Intuitive layout tools make 3D modeling fast and easy. Modify your design by simply dragging design elements to move or change them on the screen, in almost any view. All model views and sheets update automatically whenever a change is made in any view for accurate and coordinated designs and documents at all times.
31
Sloped Pipe and Invert Elevations Model sloped piping for all plumbing systems according to industry code. Simply define the rise over run and lay out your plumbing design.
Electrical Panel Schedules Automatically create panel schedules as you lay out your design. Balance the loads or change circuits for a device directly through the panel schedule. Easily edit the panel circuits through a built-in panel circuit editor.
Interference Checking Use this tool during the design process to coordinate major building elements and systems, helping to prevent collisions between elements and reducing the risk of construction cost overruns.
Clash Detection and Risk Mitigation While starting construction work internal conflicts between various components is occurred. In order to resolve and eliminate these we offer cost effective design coordination by performing clash detection between various components and activities before starting of construction activities. Hence, this serves as a very effective tool for Risk Mitigation of construction activities.
32
Construction Documentation We can easily extract HVAC, Electrical and Plumbing 2D drawings of high quality from the 3D Model. Automatically generate plan, section, elevation, detail, and schedule views that accurately capture the design information in your design model. All views of the model are synchronized at all times from a common database where changes made to any one view propagate to all views simultaneously. Coordination is managed by change propagation within the model.
Parametric Components Parametric components are the basis for all building components designed in BIM Models MEP. They offer an open, graphical system for design thinking as well as an opportunity to express design intent at increasingly detailed levels. Use parametric components for even the most elaborate assemblies for mechanical, electrical, and plumbing engineering systems. Best of all, no programming language or coding is required.
Extraction of Project Information We remove Material Specifications and Quantities, Time schedules showing the sequence of activities, Cost Estimation and Area charts to make easy Building Lifecycle management.
33
Creation of Libraries We have expertise in creating Intelligent Libraries may be called as parametric families of various MEP components of Building. They contain a centralized library of components such as ducts, electrical symbols, piping etc as per the design and specifications provided which can be used across many projects.
Energy Simulation We give assistance for analyzing design alternatives to improve the energy efficiency without effecting the cost effectiveness and thermal comfort of the buildings. We also help in evaluating the lighting effects visually and quantitatively for any given design. We can specify the lighting intensity.
High Quality Construction Documents We are capable of easily take out high quality HVAC, Electrical and Plumbing 2D drawings from the 3D Model.
34
BIM For HVAC With its 3D modeling capabilities, BIM streamlines the HVAC building design and delivery process for HVAC / Mechanical Contractor. BIM generates a complete set of high quality detail, shop, coordination or as-built drawings of a complete HVAC model. The shop drawing is utilized for heating system design, cooling system design and ventilation system design. The shop drawings are very useful for operating a well-organized project from starting with the submittal drawings to the project closeout documents. As BIM generates of parametric, or intelligent, 3D models and any change made to the model is reflected all through the entire drawing. BIM shop drawing can be imported into Navisworks for collision detection with HVAC trade. There are various types of BIM software like AutoCAD MEP, AutoCAD Revit MEP, PractiCAD, CADPipe HVAC and AutoCAD, CAD Duct etc. useful for generating shop drawings for HVAC and MEP trade.
BIM For Electrical BIM is applied as a common documentation storehouse for electrical trade that can coordinate electrical trades, develop prefabrication openings, reduce rework, raise productivity, decrease labor costs, and get better consistency of the work product. BIM will integrate all the electrical parts in a single respiratory model for efficient electrical building design. The complete 35
building model along with mechanical, electrical and plumbing systems, will be transferred to an integrated database in which everything is interrelated. This database presents authentic, coordinated and consistent design information and documentation that differentiates differentiates BIM. As for illustration an electrical engineer prefers to observe the architectural workset frequently but clasp the perceptibility of the structural workset on or off to go with the design requirements. Application of BIM for electrical project can improve constructability and speed up the schedule, save time and money for the owner including the project team. BIM creates a collaborative environment among the team members. The general contractor (GC) will be involved in designing and executing the BIM execution plan to find out what will be modeled and at what level of detail. It will help to generate effective electrical coordination. BIM mechanically coordinates all design documentation. Electrical documentation, for example, electrical plans and panel schedules become reliable as all the drawing sheets, views, schedules, reports and so forth are existing in the same underlying database. BIM generates a virtual model of all the electrical systems in 3D and allocate that information with the whole project team. The drawings, specifications, and construction details are integral to the model, which includes building geometry, spatial relationships, geographic information, and quantity properties of building components. Therefore, any design issues/construction clashes among the electrical trade can be identified, manipulated, analyzed and resolved in a virtual surroundings well before the commencement of the actual construction. BIM offers data36
centric approach with a comprehensive view of the building model and systems. The electrical engineer can evaluate the electrical requirements on mechanical equipment contained in the design and apply BIM to mechanically configure voltage and power load requirements to dynamically revise in panel schedules and mechanical equipment specifications. The intelligent property database corresponds to the “I” in BIM can be dug out from the model to schedule and annotate the drawings for the application of electrical engineering, take-off, and prefabrication. As for instance, by utilizing intelligent property data to conduit and parts, the electrical engineer is able to instantly execute a take-off of the conduit to verify the number of linear feet or quantity of hangers. The method drags live data from the actual model components in the drawing by annotating all of the conduit elevations. BIM creates realistic lighting visualizations for electrical engineers to study lighting levels and design directly in the system. BIM creates electrical system modeling with electrical devices and equipment such as lighting fixtures, transformers, generators, panel boxes, etc. Electrical engineers will be in a position to model the power and lighting circuitry of the building spaces. At the time of electrical system modeling, the electrical engineers arrange the light fixtures, power devices and equipment in the model and then forms a circuit connected to a distribution panel. The electrical engineers can easily characterizes wire types, voltage ranges, distribution systems and demand factors to guarantee the compatibility of electrical connections in the design and check for overloads and mismatched voltages. Electrical circuit model generated from BIM facilitate electrical engineers to work out the 37
estimated demand loads on feeders and panels. These loads are being utilized to effectively size equipment in the design environment. Load balancing becomes simple while managing circuits. BIM Systems can estimate lighting levels in rooms mechanically depending on the lights set in the space. The electrical engineer can just describe the reflectivity values of the room surfaces, connect industry-standard IES data files to lighting, describe the calculation work plane height and the average estimated illumination value for the room will be automatically calculated. The electrical engineers may keep calculated illumination in a report for the purpose of the design document.
What is Revit ?
Revit is Building Information Modeling software developed by Autodesk. by Autodesk. It It allows the user to design with both parametric 3D modeling and 2D drafting elements. Building Information Modeling is a Computer a Computer Aided Design (CAD) paradigm that employs intelligent 3D objects to represent real physical building components such as walls and doors. In addition, Revit's database for a project can contain information about a project at various stages in the building's lifecycle, from concept to construction to decommissioning. This is sometimes called 4D CAD where time is the fourth dimension.
38
Why Should You Revit Your Firm? “Revit allows for a higher degree of collaboration and communication, and vastly improves a team's ability to be better coordinated”, "The in-built flexible features and parametric facilities in Revit offer the project team greater agility and help them make informed decisions, synchronized design, and accurate construction documents. A successful BIM implementation results in well-managed, accurate quantities, change management (automatic changes), earlier visualization, detection of potential spatial conflict before construction, better project planning using 4D and 5D techniques, improved techniques, improved energy analysis and collaboration with different project disciplines.
Parametric Family Revit is the best 3D Parametric Modeling Software. The parametric components carry information about their relationships to other objects in the building in contrast to the blocks and solids used in AutoCAD. AutoCAD dimensions only display the distance between two entities. But in case of Revit, when the dimension value is changed the objects associated to the dimension are moved.
39
