The Leader of Design and Construction in Structure CAD Industries

Posted by: Admin | Posted on: January 10th, 2013

The magnificent steel structures and buildings we see today are outcomes of art, science, use of software(CAD: Computer aided Design) and architecture applied to steel.

WHY USE STEEL: Steel stands out as the best constructing material due to following reasons:

  • Steel is 100% recyclable.
  • It is durable and of uniform quality.
  • Steel pieces can be combined in various ways. For instance, Beams can be bent up to 360 degrees.
  • Steel structures can be redesigned according to changes in building styles. Even the position of walls can be altered to make way for new interior layouts.
  • It is also easier to upgrade such buildings with new electrical wirings and communication systems.
  • Under extreme loads, steel does not crumble as it is ductile and flexible. Steel buildings are being constructed in earthquake prone zones.

CODES OF STEEL DESIGN AND CONSTRUCTION: The AISC( American Institute of Steel Construction) publishes Code of Standard Practice for Steel Building and Bridges that cover various aspects of steel design and construction. ASTM( The American Society of Testing and Materials) is an organisation that generally establishes the grades of structural steel.

STEEL DESIGN AND CONSTRUCTION: The entire process of design and construction involves:

1. Engineering
2. Detailing
3. Fabrication
4. Erection

The main members include beams, columns, trusses and girders which together make the skeleton of the entire structure. Secondary members include bracing, stairs, decking and carry specific loads.

The fabricator in consultation with the structural engineer assembles the connections which require inputs by EoR(Engineer on Record) too. Standards or template designs are produced to simplify things as connections are the most complex part of the structural engineering of a project. The real design challenge lies in knowing the true reactions at the connection.

The EoR prepares a record of final calculations used to determine the size and type of all members and their connections. Detailers interpret the structural design drawings to determine what steel needs to be purchased, how it will all fit together and also prepare the Steel Orders(bill of material) to purchase steel from the mill. Thereafter, erection drawings serve as a roadmap of how to erect steel assemblies and how the connections will be fabricated in the field.

Detail drawings give the fabricator proper instructions on how to fabricate each piece. After fabricated assembly is transported to the field, the process of erection at the project site begins. There is less impact on the project if changes are identified earlier otherwise it can lead to escalated costs and even put work on hold.

A good steel structure will show good design, will be competent for taking unanticipated loads, will be constructed using good material with equally good workmanship.