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Monday, October 31, 2011

BIM provides digital fabrication of structural steel

BIM is very useful for the digital fabrication of structural steel. BIM can model entire steelwork structures in 3D along with last notch, plate and bolt to facilitate the fabricators in reviewing a 3D steel structural model right from the fabricated components. All detailed information as well as the drawings, material list and other data are automatically generated from the model. The various data can then be transmitted to production planning and automation systems. Such automated routine tasks permit the fabricator more time to focus on the principle precast design and detailing decisions.

A purpose-built building information model can nourish the manufacturing process as the design model contains all the geometry related with structural steel. The design informations are exported to a CIS/2 file (an industry standard data format for replacing steel information) to be used again in a steel detailing application.

Once the steel detailing is completed, the design team or contractor utilize the fabrication model for 4D modeling and clash detection with other building disciplines and models (MEP, architectural, etc.). The fabrication model contains more detail than the structural model, and consequently helpful for interference checking, particularly for building types or application where space is extremely tight.

Applying the design model directly for fabrication will produce a usual feedback loop among fabricators and designers. It will convey fabrication considerations forward into the building design procedure. Sharing the design model with fabricators for bidding will curtail the bid cycle and initiate more consistent bids based on reliable steel tonnages. And the coordination among the fabricated steel and the other building components will decrease the on-site issues and lower the increasing cost of steel erection.

An integrated BIM model empower fabricators to manage not only the fabrication phase of the project but also other verticals of the project as well as modeling, fabricated parts design and elaborating, contract management, financial evaluation, and supply chain management, along with keeping track of updated manufacturing data.

Trim down project cost by removing any inaccuracies in the design of fabrication components, minimizing wastage and ensuring timely delivery of project.

Benefits of BIM for steel fabrication :-

Aid in generating off-site fabrication models for real time viewing in order that throughout the actual process of implementation designers, fabricators and architects in a similar way do not face delays.

Allows clash-free design with consistent drawing sets

Accurate Visualization during fabrication and erection

Highly detailed models for making fabricated components

Allows reviewing of automated construction documents and material lists
High quality due to prefabrication of different components

Reduction in wastage and improvement in schedule and delivery

Useful links
BIM and Digital fabrication

Posted by Rajib Dey
Business Development
Global Associates (Pioneer Company in 3D modeling with BIM & Sketchup)

visit our BIM sites

Saturday, October 29, 2011

The impact of BIM for construction industry

BIM or Building Information with it’s real time three dimensional features, serve as a construction productivity tool to increase productivity in the design and construction phases. Many large construction companies are experimenting with BIM to produce cost and schedule savings.

BIM can be utilized for successful construction, lifecycle and long term facility management. BIM data is applied to demonstrate the entire building life cycle. Quantities and properties of materials are extracted without any difficulties. The scope of works is defined effortlessly. Moreover assemblies and sequences are presented in a comparative scale to each other and relative to the entire project.

BIM contains geometry, spatial relationships, light analysis, geographic information, quantities and properties of building components.

Building Information Modeling is digital representation of physical (actual parts and pieces being used in the construction process) and functional characteristics of a facility producing an allocated knowledge source of information about the facility. Thus BIM outline a trustworthy basis for decisions throughout its life cycle, from earliest conception to demolition.

BIM can be utilized for construction visualization and result in considerable cost savings, from design and construction through to maintenance. BIM eliminates a lot of risk s and issues easier and earlier before actual construction took place. As a result the construction process gets shortened and construction takes places more efficiently

BIM model saves time and waste on site as the model provides huge accurate and coordinated information which will lead to fewer errors on site. Thus BIM result in considerable cost savings, from design and construction through to maintenance.

The reduced material waste and aptitude to optimize energy utilization through BIM has also made it a rising option for green building projects.

With its parametric characteristics, BIM track the relations among numerous objects from early design through to completion so that if one object changes, the change is automatically coordinated across the project. Each change in design, scheduling or material is immediately accessible to every member of the building team—from engineering and purchasing to plumbing and electrical. As for example BIM analyzes and illustrates every member of the construction team how many light fixtures are required to light up a space receiving little sunlight. It works out how a change in wall color matches up against the carpeting that’s on order. BIM can also find out how a recommended change will have an effect on subcontractor costs and scheduling.

The BIM can also be applied for MEP plans, to generate a drastic reduction in RFIs, and to optimize schedules.

BIM has the potentiality to create a virtual information model that will be handed over from Design Team (architects, surveyors, consulting engineers, and others) to Contractor and Subcontractors and then to the Owner. Here every one will include their own additional discipline-specific knowledge and track changes to the single model. This can lead to reduction of information losses in transfer. BIM also facilitates conflict detection (where the model really notifies the team about parts of the building in conflict or clashing) to check errors occurred at the different phases of development/construction.

BIM is also useful for evaluating several engineering factors like lighting, acoustics or energy practice, to facilitate provide feedback in the designing phase. So the engineers and designers get the ability to have the consequences of changes and discover alternatives in a streamlined process.

BIM programs are also liable for creating general cost estimating for construction project. All the general information are extracted from the model and connects with a database for estimating.

Now some new ideas like applying BIM for older, pre-existing facilities are coming up. These generally reference key indicators, like the Facility Condition Index (FCI). However, the legitimacy of these models should have been observed over time. In order to model an existing building it will require several assumptions about design building standards and codes, construction methods and materials available at the time of construction.

Posted by Rajib Dey
Business Development
Global Associates (Pioneer Company in 3D modeling with BIM & Sketchup)

visit our BIM sites

Thursday, October 27, 2011

Validate your design with BIM based clash detection and constructability reviews

BIM or Building Information Modeling plays an important role for design coordination, clash detection and conflict resolution.

BIM selectively check for interactive clashes among any particular system, between MEP system and structural system etc. Clash checks are carried out at any level of detail (LOD) and across any number of building systems to resolve myriad probable construction dilemmas.

Clash Detection facilitates well-organized inspection, identification and reporting of interfering clash in a 3D-4D BIM model involving different 3D-4D solid objects.

The coordinated models may be utilized for quantity takeoff, locations, scheduling, and estimating.

  • Diminish the risk of human error throughout model inspections
  • Resolve dilemmas at the design stage sooner than the construction phase when rework is enormously expensive
  • Produce a collaborative atmosphere amid all stakeholders performing in the direction of geting the best potential solutions to bottlenecks
  • Helps to reduce the risk of on-site error
  • The Coordinated models generate more precise quantities by location; do a comprehensive clash
  • The coordinated models cause more off-site prefabrication which can save hours of re-work in the field
  • The buildings are oriented and designed to achieve optimal energy efficiency



Design/Construction Team must accomplish and manage an adequate and comprehensive Clash Detection practice to identify and resolve all major interferences among building components become the commencing of actual construction. If the building interference is found to be zero then it will result in minimizing the number of changes all through the construction.
The BIM Manager will accumulate a compound model from all of the model parts of each design discipline for executing a visual check of the building design for spatial and system coordination. Vertical shafts are also evaluated to make sure that ample space has been arranged for all of the vertical mechanical systems and that all of the shafts line up floor to floor. BIM manager will issue a revised clash report to the technical discipline consultants before each scheduled coordination meeting.
In case of a multistory project, the models are spilt on a level-by-level basis for MEPF coordination. For a large project the model is split by zones to trim down file size. Usually, 3D clash detection/coordination go on with a single floor awaiting for coordination of building systems and then continues on the next floor up.
Coordination software may be applied for assembling a range of design models to electronically recognize, collectively coordinate resolutions, and track and circulate interference reports between all disciplines. The technical disciplines shall be responsible for updating their models to reflect the coordinated resolution.
The team should analyze the model and the Clash Reports in coordination meetings on a usual as-needed basis during the design stages until all spatial and system coordination issues are resolved.
All through the construction phase, the accurateness of fabrication models are verified. Before starting fabrication submittal for approval, fabrication contractors must put forward their models to the Contractor’s BIM Manager for integration and clash detection/coordination and resolution.
Internal Clash Resolution – Design Consultants and Subcontractors required to coordinate the clashes among the various scope of work earlier than providing those models to the BIM Manager for spatial and system coordination.
Spatial Coordination Verification: Verification and tracking of resolved conflicts of all trade coordination issues must be resolved before the starting of bidding as these may lead to change orders or field conflicts.
Latest innovation in clash detection system is Tekla BIMsight. It is a free clash detection and coordination product.

Useful links :-

BIM clash detection


Coordination and Clash Detection


Minimum Requirements for Spatial Coordination and Clash Detection

Posted by Rajib Dey
Business Development
Global Associates (Pioneer Company in 3D modeling with BIM & Sketchup)

visit our BIM sites

Monday, October 24, 2011

BIM simplifies visual estimating for construction industry

As the building design matures and construction details are accurately modeled, BIM software can swiftly take out data like floor areas, material volumes and bills of quantities. This data can be directly linked with any cost estimating software to quickly produce very detailed cost estimates that factor in the planned construction process and consider the labor, materials, equipment, and subcontractor costs for all building elements.

With BIM the cost estimator can envisage the target costs together with multiple design options following a target cost driven design. An estimator would create, maintain, and develop a cost plan while receiving models from several sources from the design team and subs and then visually converse the impact on the estimate to the Owner, designers and all project stakeholders during the pre-construction phase.

With BIM an estimator can prepare conceptual estimates and evaluate the cost of suggested alternatives and organize preliminary estimates based on quantities of key building elements to ensure cost feasibility and appraise proposed design changes.

A conceptual model can put in an advanced level of detail to your work which can also present accurate scheduling before time.

Amalgamation with the design models and cost estimation provide positive cost feedback to the project team and inform decisions throughout all design stages from inception through construction. This diminishes errors & lapses, save time and can help curtail excessive budget overruns due to project modifications.

The fifth dimension features of a dynamically integrated 5D model can produce more accurate estimating. It ties cost to the model. The Estimator can now illustrate the Owner the exact building elements that contribute the most to the budget. Now the Owner will easily understand what occurs to the cost and schedule if a new design is put into operation.

Posted by Rajib Dey
Business Development
Global Associates (Pioneer Company in 3D modeling with BIM & Sketchup)

visit our BIM sites

Sunday, October 23, 2011

How BIM provides a great assistance to the Architects

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 model-the 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 co-ordination 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 schedule etc are automatically generated from a BIM model. These meta data are utilized directly for reports devoid of cross-verification.

BIM at the engineering firm makes it easier to analyse late changes and rapidly return the data to the architect for examination.

Posted by Rajib Dey
Business Development
Global Associates (Pioneer Company in 3D modeling with BIM & Sketchup)

visit our BIM sites

Saturday, October 22, 2011

How design firms utilize BIM for their project

Design firms to leverage the advantages of BIM for their projects by converting a project design from 2D drawing to BIM. BIM can be utilized to conceptualize, build up, document and accomplish complete project.

2D drawings are extracted from the building model created in BIM and depict various errors. These drawing are created on the fly. Any design alteration made in one view will be fully circulated during all views.

BIM facilitates 3D representations to be produced from the building model at any phase in the design. These can vary from simple wireframe models or multifaceted photorealistic renders. These 3D representations are dependable with each other and with other 2D drawings.

BIM creates virtual environments for designing building forms. This will help to build and test the designs well before the building gets constructed physically.

BIM can also be utilized for sustainability requirements and valuable data can be extracted from BIM model for downstream uses.

BIM can be applied to prototype a building virtually involving the most up-to-date technology to allow the reprocess and flow of information and data for the design, construction, management and operation of the facility. It is a series of systems, which through inter-operability keep data to be replaced in a collaborative manner.

BIM contains parametric scripts which can be utilized to generate complex forms to rationalize designs.

Posted by Rajib Dey
Business Development
Global Associates (Pioneer Company in 3D modeling with BIM & Sketchup)

visit our BIM sites