Who We Are?

Tekla Open API Development
Steel Detailing
Macro Developments
Tekla Custom Components

Demands of the steel construction industry are unique and without parallel. The quality of workmanship is paramount. There is no room for errors or make-ups. At every level of execution, a great deal of attention is required from every resource that is deployed.

While this demand for high quality exists across the board, the pressure on owners and builders to contain costs has never been higher.

We at 3Define are proud to be doing our part in addressing this need in the industry. Since 2015, we have been providing high quality structural steel detailing solutions for fabricators, general contractors and building owners at some of the lowest prices in the industry.

About Us


We at 3Define began providing detailing services in 2015. The secret of our success has been quite simple. We built our organization around a framework of quality standards which we put in place from very early on. Our team of experienced detailers, checkers and project managers work within very strict quality guidelines with checks and balances. We simply have no loopholes for errors to creep into our deliverables!

Apart from the emphasis on quality, we are adamant about sticking to our delivery commitments. We are known to offer fast turn-around times for drawings in the industry. We are able to honour our promised schedules by having our detailers work in multiple shifts as and when the situation demands.

We are fully equipped with the following technology platforms:

  • Tekla Structures 3D Modeling and Detailing
  • 2D Detailing of Steel Structures.
  • Custom Component Developments.
  • Macro Developments.
  • Plug-in Developments using Tekla Open API.
  • Extension Developments using Tekla Open API.


Steel Detailing

  • Detailed structural steel fabrication shop drawings and erection drawings
  • Miscellaneous Steel Detailing including but not limited to stairs and railings
CNC, KSS, DXF, CIS2, IFC, and VRML Files for Material Management Software Systems, Shop Production Line Equipment.

Our Deliverables

  • 3-D Models
  • Advanced Bill Of Materials (ABM)
  • Fabrication Drawings With Small Parts / Gather Sheets
  • Erection Drawings
  • Field And Shop Bolt Lists

Our deliverables are customized to your needs. All our drawings are prepared under the guidelines of IS, AISC, CISC, AS, UK and NISD standards.

Custom Components

Our Tekla experts develop custom components that works with tekla structures for the complex model objects.


Open API Developments :

Our expert team automates the detailing processes using various Open API techniques for a optimized and precised outputs.

Macros :

Our Macros are designed for your needs. It helps to offer fast turn – around times for drawings in the industry.

Misc. Detailing :

We also Provide Miscellaneous Steel Detailing including but not limited to stairs and rails.


Project Completed


Open API Developments


Custom Components



Our Mission

3 Define Technologies maintains integrity, honesty & quality as the highest priorities to ensure the long term success of not only our reputation and competitive position, but also that of our clients. Our team is customer focused and we strive to create loyalty through the pursuit of continuous improvement, innovation and the desire to be the best at what we do We are committed to our clients’ success, working diligently to provide quality in every project we are a part of.

We strive to be a valuable resource to the construction and structural steel industry, providing our services at competitive prices.

We invest continually in upgrading our technology problems and in training our detailers and checkers. We do not cut corners when it comes to investing in these resources. We are proud of our dedicated training department that caters to our manpower skills development!


Nagarajan G

Managing Director


The company seeks individuals who desire to grow and develop along with us. We are currently looking for skilled professionals for the following positions at our Chennai office.


Good knowledge in US based Steel Detailing with min. 5 yrs. experience in checking structural and misc. steel shop drawings. Provide technical and mathematical checking of shop fabrication and field erection detail drawings to ensure compliance with AISC standards, the projects structural design documents, and specifications. Knowledge of TEKLA is mandatory. Exposure in AutoCAD is preferred.

Key Skills: Structural Steel Checking using Tekla Structures

Salary: Best in the industry

Qualification: Graduate (B.E/B.TECH) in Civil/Mechanical engineering

*In addition we are always looking for Experienced Modellers & Team Leads having sound knowledge in US based steel detailing.

Send your resume to g.nagarajan@3definetech.com

Our Work

Latest News


How may we assist
Where to Find Us

No,12, second floor, second street, Sri Sakthi Vijayalakshmi Nagar, Off. 100 ft Bypass road, velachery, Chennai – 600042, Tamil Nadu, India

Email Us At
Call Us At