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BIM For Precast Industry ...

Precast concrete is a process associated with construction where concrete is cast in recyclable moulds and alleviated in a controlled environment. It is then transferred to the construction site and lifted and fixed in the structure.

BIM provides some great benefits to owner, architect, structural engineer, precast fabricator and erection crews who mutually work in a prescast construction process.

BIM technology can be applied to improve the quality of precast engineering design regarding drawings and exactness & consistency of the documents. Fabrication and erection are essentially error-free, and the effort required for checking drawings has declined drastically.

By applying BIM precast fabricator can shorten lead times for preparing their shop drawings rapidly.

BIM contains a huge database of information which can be utilized to improve the productivity of design documentation from project to project.

The most significant benefit of BIM is that the software decreases engineering cost and cost of rework caused by errors. Besides BIM develops precision in cost estimating, decreases engineering lead time to a great extent provides support for automation in production.

BIM facilitates design and detail of precast elements with complex geometries in short times and remove the geometry or connection errors and time raised on checking and vetting drawings during fabrication or erection of precast elements.

From a BIM model all the information are circulated in both engineering and in production in preparing precast shop drawings to pre-build a precast project in the virtual world . All geometry, details, and connections within the model are properly placed and coordinated.

BIM is applied to evaluate prospective inconsistencies or project obstacles in the model, in order to determine and resolve these earlier to issuing drawings for construction.

The BIM technology minimize the chances of misaligned connections, inaccurate architectural features and geometry conflicts, to make sure that shop drawings are generated without any in depth checking or cross coordination connecting drawings.

Any changes in the precast concrete project like revising wall panel reinforcement from rebar to mesh, moving and adjusting the sizes of mechanical blockouts, revising some lift hooks, and minor changes to some connections to make erection simpler for site personne, requested by the architect, the owner, and the precast manufacturer, can be put into the model and all the related drawing are updated automatically. This is made possible with the parametric features of the BIM model.

Within a BIM model, the documentation is generated quickly and inexpensively to facilitate the creation of various reports and drawings which can depict the precise information requirements of the various Consumers.

Advantages of BIM for precast concrete:-

  • Model the overall geometry;
  • Take up design changes with a minimum of rework in organizing and reconciling different drawings;
  • Model any missing custom components (reinforcement details, connections details, embeds);
  • Make 3D visualization of the project to facilitate check for and evade design errors. This is useful for observing complex and congested arrangements of embeds, reinforcing and prestressed strands;
  • Production of schedules and shop drawings to improve productivity for precast structures in as automated a fashion as could be achieved;
  • Visualize the structure, purposely to present the spatial precast elements in three dimensional views to the owner

Useful link:
PCI BIM Committee Presents the Benefits of openBIM to the Precast Industry
Tracking Precast Pieces

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