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Structure Detailing Process

Structure Detailing Process

Detailing of steel structures is a very critical process which requires high concentration and understanding. It is not a one day work. The other process of fabrication and erection depend on the detailed sheets completely and that is why any mistake can result into re-fabrication of component which is generally costly in nature because of Steel costs thousands more per tonne. 

After the design part is done a model is created with the help of software”s. In detailing each and every element is detailed with its height, width, shape, exact cutting length, cross section, connecting bolts diameter, welding and weldment assembly. Such a drawing is called a shop drawing, or a fabrication drawing, or manufacturing drawing. In the past these drawings were prepared by expert draftsman that use to consume a lot of time but now modeling software produces these drawings. If we talk about modeling software one of which is autodesk’s advance steel which comes with variety of drawing style applicable to any model thus saving time.


Types Of Drawings.

a) Shop drawing                              b) Erection drawing

In shop drawings or detail drawings every minute detail of individual element or component (column, beam, braces, type and size of bolts, type and size of welding, etc) that needs to be made by the steel fabricator is mention. These include material specification, size, cross section, dimension, and number of times they are present. Also a complete bill of materials is there which gives an idea about how much cost would be incur. Erection drawings as the name suggest are helps in placing the elements in their correct position. These covers ground level heights, dimensions and position of each component, their connection details like bolt assembly, welding spots

The production of fabricated steel starts with the steel detailing group, which follows an established procedure to ensure an orderly flow of work through the shop. A tremendous amount of paperwork is involved. Drawings and bills (standard forms) prepared by the steel detailer form an important part of this paperwork. A steel detailer plays a tremendous role in the overall project progress. The detailer must be familiar with regulations and guidelines from all aspects of construction. OSHA, AISC, minimum

bearing limits, and common standards/practices must be included in the detailer& skill set. A good detailer can make even the most complex project very feasible for any fabricator. The drawing layouts prepared by the detailer must be understandable as it is not only seen by fabricators but are helpful for HVAC, plumbing installation perspective. Structural steel detailing process acts as a medium between the designer, architect and fabricator, any discrepancies in the drawing observed by the fabricator can directly or indirectly get resolved by bringing to the attention of the design team.

Detailing Procedure

typical detailing group would perform its procedures in approximately the following sequence:

  • • Initiate job and fabricator setup (i.e., pre-planned checklists).
    • Prepare typical details, job standard sheets, layouts, and calculation sheets.
    • Prepare system of assembling and shipping piece marks.
    • Prepare and check advance bills for ordering material.
    • Make and check anchor rod/embedment drawings.
    • Make and check erection drawings.
    • Make and check detail shop drawings, including bills of material.
    • Secure approval of shop drawings Incorporate approval comments.
    • Issue shop drawings to the shop.
    • Prepare lists of field fasteners.
    • Fit check.
    • Issue shop and erection drawings to field.


What is MEP engineering ?

MEP is deals with  Mechanical, Electrical and Plumbing engineering. As well as this serve a very important aspect inside of the structure.Which definitely for  comfort of humans and animals using it.After all this works as a central nerves system of the structures. And also make structures habitable  for humans. Clearly MEP installations named together because of high degree of interactions between them.  Also therefore to avoid clashes between utilities .


The mechanical design elements of the building ,like heating, cooling , mechanical ventilation. Moreover  these systems are interact to keep inside of structure habitable. And also control temperature , humidity in optimum level for the comfort of it’s user. Mechanical utilities helps to keep energy consumption low as possible.

These are some of utilities come under mechanical engineering.

  1. Mechanical (HVAC) engineering.
  2. Heating, ventilation, air conditioning  system.
  3. Water heating system
  4. Central plant design.


 Electricity is need for different electrical system to keep running. Hence electrical engineers main job is to provide continues supply of uninterrupted power also wiring connections optimum route without interfering other utilities.  

These are some electrical utilities mentioned below.  

  1. Main power distribution.
  2. Plant lighting.
  3. emergency lighting
  4. Fire alarms and emergency services.
  5. IT and internet connections


Plumbing services are assigned  for the transport water, chemicals, Gas in building or at industrial plant. Therefore  designing accurate and safe piping system is the plumbing engineers job.

  1. Cold and hot water pipes.
  2. sanitary water
  3. drinking water
  4. Gas
  5. pipes for different chemicals.

Building Information Modeling (BIM)

What is Building Information modeling?

Building Information modeling (BIM)  is an intelligent 3D model based process of managing information of project across its whole life cycle. That also helps architecture, engineering ,construction, contractor professionals tools to more efficiently plan, design, construct and manage building and infrastructure projects effectively. – Autodesk

BIM allows  stakeholders and AEC (architecture, engineering, construction) , multi disciplinary team to manage and collaborate data at one place. which helps to track project life cycle from start to end. 

How BIM is used in various stages of project?

BIM can implement in various phases of the project. As BIM is a 3D virtual representation of project. Furthermore It adds 4th and 5th dimension as time and cost of the project. This shows a interrelationship between geometry, data, quantities and material and properties of building components.In addition to this an instance if we change a one model  BIM will automatically update the model. And its properties in each and every view along with its properties.

Planning and Design

Post Construction

In initial phase of planning and design, designers draw 2D and 3D models of the project. Architecture, engineers, design different models . After finalizing conceptual designs, structural engineers design the structural components of building .Also Other utilities work out by MEP (Mechanical, Electrical, plumbing) designers. Subsequently all the data collected at a one place. After that clash detection is done. definitely this help whether any utilities of structure is clashing with one another. Hence rectify any problems are there any. IN addition the important thing is that especially we can know various problems before the start of the project.  This make BIM a better tool and a game changer in construction industry.


 Clearly by the use of BIM one can manage and facilitate building structure and its various components throughout its life span. For example, placing of various components in the building, maintaining the structure. In future making any changes in the project itself. As BIM stores every data about contractors, vendors, engineers it is very helpful.  BIM can be used to do periodic maintenance of structure.

BIM is very useful tool if implemented correctly. It helps to reduce cost and time of the whole projects. it is also used for energy analysis of structure, cost control, high precision timely delivery of project, material and resource control, documentation of the project.

What are Advantages of using BIM ?

  • Cloud based services
  • interoperability
  • Increased coordination between AEC firms.
  • Reduction in project time.
  • Reduction in project cost
  • Increased efficiency.

Think BIM, switch to BIM.