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Basic Structural Steel Drawings Useful For Fabrication & Erection

Structural Steel Fabricators that actually prepare the steel structure or building heavily depends on detailed drawings prepared by the steel detailer. The steel detailer produce these drawings using the construction drawings supplied by structural engineer depending on material availability and shop fittings. Below is a brief outline of essential drawings required during structural steel fabrication and erection.

Design Drawings:
These drawings are produced by structural engineers or architects. Design drawings contains all the details required to prepare structural drawings. They provide data on loads, axial forces, moments, and shear forces. It also contain information of each framing member, precise dimensions, location of each beam and column and general notes for reference.

Anchor Bolt Settings:
Anchor bolt plans explain settings of all anchor bolts with regard to the foundations or footings. Typically, the construction of the foundation has nothing to do with steel fabricators job but the masonry plans may contain some items which the steel fabricator need to furnish. They include leveling base plates, anchor bolts, grilles and machinery braces that must be positioned by the masonry person well before the erection of the steel framework. The steel fabricator supply final anchor bolt settings plan to the masonry person to explain he field placement of the anchor bolts.

Column Base Connection Details:
This generally illustrates connections between the steel framing and the foundation. It may contain information like grout thickness dimensions, elevation of base plates and anchor bolt projection, etc.

Detail Drawings:
Detail drawings present details of all connections. It displays the relationship between connected structural members and may contain common assembly and clearance dimensions. Steel Shop drawings are produced from the connection details furnished here.

Shop Drawings:
Steel fabricator uses Shop drawings to fabricate each structural member in steel fabrication shops. Structural steel members are manufactured according to the details and dimensions information furnished in the detail drawings. Standards for shop drawings differ from one fabricator to another but typically all drawings comply with the AISC (American Institute of Steel Construction) standards for structural detailing.

Erection Plans:
The structural drafter prepares Erection plans for the steel structure. These drawings contain important information such as the location of each member or sub-assembly in the steel framing, column base connection details, anchor bolt plans, etc.

Bill of Materials (BoM):
Typically, a CAD draftsman prepares the bill of materials listing all structural members of the steel framing separately. The bill of materials is displayed on all shop drawings and contain information such as required material quantity, erection marks, shop and field fasteners, size of connecting plates, etc.

General Notes:
General notes are required on all steel drawings and provides essential information such as type of steel, size of holes, size of bolts, hole patterns, etc required by the fabrication shop.

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Modern Structural Steel Design and Fabrication Practices

Before the invention of 3D CAD modeling and BIM techniques, Structural steel design process was carried out using engineering analysis and design were described in a set of structural framing drawings. Now it is possible to draw these 2D drawings from 3D models which were done previously by manually drafting. Typically 2D drawings are utilized as the construction documents with the fabricator, presenting complete structural information for the building or structure.

The fabricator uses shop drawings and prepares connection details and design calculations using the same 3D model. The detailed model is also used to extract fabrication shop drawings, generate computer numerical control (CNC) data. CNC data helps organize the fabrication process and ensures timely delivery of assemblies to the construction site.

Modern Structural steel design software such as AutoCAD and Tekla provides designer the flexibility to create any number of user-defined elements resulting in accurate geometric data with few errors. To prepare 3D models and drawings the structural designer first determines who the potential data users are, processes involved and data that can best support existing processes. Once it is determined what data is useful to each end user, how the data would be incorporated into the design procedure and what data format is required, the user starts entering the data into the model as and when required.

For Structural steel erection it is important to define a schedule and the desired sequence of construction. In practice the erector determines a region of the structure to construct first and what regions will be used in future. Various factors are involved when you determine the order of erection. Site configuration, crane capacities, crane access to the site, etc drive the order of erection. The fabricator uses an independent material tracking database for this purpose. Data from this database can also be redirected to the 3D model to avail graphical images.

For proper execution of fabrication and erection work, shop and erection drawings are released to the fabricator in a defined sequence. All the elements of shop drawings are assigned a unique number for easy recognition. By decoding the shop drawing number, all elements required for erection can be quickly identified resulting in savings in time.

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Structural Design Drafting - 2D Drafting For Quality Outputs

Structural design and drafting is a vital process of structural engineering services. To build accurate building structure, it is must required process. Any type of construction whether it is a residential or sky scraper, starts with design and drafting. It plays important role in making of mega structures effectively. Structural engineers develop design and drawings and draftsmen analyze various technical aspects and requirements. For better outputs draftsmen use 2D drafting technology. It improves the working quality and assures successful building construction.

The process of design and drafting involves the study of drafts, instruction and information. In the past time designs and drafting was done by handmade drawings so there would be a possibility of occurring errors. At the present time Computer Aided Design software is invented and by using this software designing work is become easier and quicker. It improved designing work as it provides user friendly features. Using the structural CAD design, models of structures can be easily manipulated which consumes more time by making manually.

Value of structure can be improved by using the proper arrangement of drawings set which can be evaluated through the various design phases. It also provides better options for proposed buildings. To develop the digital building models, structural engineers are using 2D technology for drafting. It allow user to view the future building plans and design in the proper ways. Basically draftsmen are evaluating the specification and technical concepts so for quicker output 2D technology is providing user friendly environment.

Applying the regional building standards and international codes, structural engineers carry out calculations and specification of required material. So it prevent from wasting materials. For safety purpose one should have to make sure that international standards are followed and designs got approval from the local authorities.

Infrastructure development shows the reputation of any country. So for faster development of infrastructure, all the process must be computer oriented to prevent the redesigning. This purpose can be satisfied by using CAD technology in the design and drafting.

For faster growth one can outsource the projects of design and drafting as there are so many resources are available. Many of the firms are available which have successive experience in various domains like residential, commercial, institutional and other mega structures.

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Structural Steel Detailing - What it is and How It's Learned

Though most people have never even heard of the position, structural steel detailing provides the framework for every building that is erected today. The professional whose job it is to create drawing for the steel fabricators is called a steel detailer. Whenever a new building is erected in a large metropolis or a growing suburb, a steel detailer is an indispensable member of the construction team. The detailer provides in depth plans for the steel construction company so that they will know exactly what is required for each job. Structural steel detailing is used almost exclusively on industrial or commercial projects since those are the only projects large enough to need structural steel.

Structural steel detailing requires input from engineers, architects and general contractors if it is to be successful. A good steel detailer is expected to work closely with a wide range of professionals so that he may provide his client with a superior product. Steel detailers often work for steel construction or engineering firms, they may even be self-employed and offer their services to steel construction companies on a regular basis.

Structural steel detailing is unusual in that it is one of the few highly technical construction jobs that do not require a college degree. In fact, college programs that offer a degree in structural steel detailing are rare in the United States. However, there are certification programs and steel construction companies often pay to have their younger, less experienced steel detailers attend them. This is due to the fact that the profession has come to rely more and more on computers and advanced technology in recent years. Previously, most of the drafting and design was done manually. But nowadays computer-aided drafting software is employed by most of the top steel construction companies.

But in spite of all of the technological improvements, structural steel detailing is more about on the job experience than it is about classroom theories, which is probably why a college degree is not required for steel detailers in the U.S. It is responsibility of the steel construction company that hires a new steel detailer to properly train him in his new profession. This training often requires a kind of apprenticeship, with the new detailer or trainee working under an experienced detailer for at least five years before he learns everything he needs to know about the trade. In the end, structural steel detailing is a profession that relies almost entirely on experience and on the job training rather than classroom training.

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Structural Steel Detailing - Its Standards and Its Software Tools

Structural steel detailing is the design and drafting of the connections between the steel beams and columns in the massive steel frameworks that form the skeleton of most multi-story buildings in the western hemisphere.

The design of these connections is naturally very critical, since the decoupling of any beams from columns could result in collapse of the steel framework as well as the building, and the consequent deaths of thousands of people.

For that reason there are very exacting standards which are followed for structural steel detailing. These standards are different for every country, and are compiled by recognized industry associations of the concerned country.

Examples of such associations are:

American Institute of Steel Construction (AISC)
Canadian Institute of " " (CISC)
SBI Swedish Institute of " "
EUROFER, the European Confederation of Iron and Steel Industries
African Iron & Steel Association
Arab Iron & Steel Union [AISU]
World Steel Association (formerly IISI)
Brazilian Steel Institute (IBS)
British Constructional Steelwork Association (BCSA)
Iron & Steel Institute of Japan
Korean Iron & Steel Association
Malaysian Structural Steel Association (MSSA)
Norwegian Steel Association
Steel Construction Institute (SCI- UK)
Taiwan Steel and Iron Industry Association (TSIIA)
Japanese Society of Steel Construction
The Steel Construction Institute
The Southern African Institute of Steel Construction
China Steel Construction Society

Structural steel detailing starts after the design of the structural framework has been completed. Using the properties of the steel material in question, the steel detailer calculates the forces acting on the connection he is designing. He then consults design tables to arrive at the specific design details of the connection.

These design details would include the material and dimension of the brackets, nuts and bolts. He expresses these in the form of an erection drawing, which is a drawing that people working on the site follow to assemble the actual connections.

Structural steel detailing typically involves the use of one or more very specialized software programs, such as STAAD, RISA, SAP2000, RAM, PCA, SAFE, SDS/2, Tekla and ETABS. Some of these programs are so sophisticated that one has only to input the steel structure design along with some specific parameters such as material, edge distance and cope criteria, and the program designs the connection automatically with a few clicks.

The erection drawings are usually created with wide-used CAD platforms such as AutoCAD or MicroStation.

Structural steel detailing is clearly an evolved discipline with stringent standards and sophisticated tools at its disposal.

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Basics of Structural Beam Load Analysis and Beam Connection Design

AISC (American Institute of Steel Construction) is the controlling authority for implementing uniform steel fabrication practices in USA. For this, AISC has provided LRFD Specifications for structural steel buildings to help commercial designers. These specifications help identify clearly the structural resistance within the elastic and inelastic ranges of behavior and the maximum load limit state.

The objective of structural beam design is to create a physical structure that can withstand all environmental conditions to which it is subjected. Many factors influence the design process, from foundation to loading to dimension lay out to risk and cost, but ultimately the final design is a reflection of the properties of the construction material and the geometrical imperfection of its structural components, and in particular its mechanical properties.

Today, in engineering design practice, there exists a basic two-stage process for structural beam design: firstly, the forces acting on each structural beam in the structure are calculated; secondly, the load carrying capacity of each of these structural beams to those forces acting on it is evaluated.

The first phase involves an analysis of the distribution of forces and moments acting on each of these structural beams; the second phase involves detailing of the load carrying capacity of these beams to withstand these forces and moments acting on them. The more comprehensive this details, the more exact will be the design and the more reliable will be the structure.

Since the load carrying capacity of structural beam is dependent on the type of loads acting on the beam, geometrical irregularities and material properties, load-carrying capacity is determined mostly on the basis of full scale tests for axially loaded beams and beam-column interaction curves. These beam strength curves are commonly coded as the beam strength curves or equations for design purpose.

At present, the structural engineer evaluates design primarily on the simple model of linear elasticity of the material. Structural steel beam design emerges successful only when proper analysis is done (many times using CAD 3D models) and with right structural analysis considering both axial forces and bending moments.

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Applications and Benefits of Structural CAD Services

Structural CAD services are widely used in construction, since their applications and benefits. This is a set of procedures used in construction. E 'possible to imagine how the building will be similar. Offers better opportunities for the structure proposed building. The value of structural policies drawings and sketches can be increased by EUR structural.

Models of structures, designs, and applications can be easily measured with the use of CAD Serviceslong time by hand. To save your precious time and facilitates civil engineers for the development of complex structural development. A project includes plans for foundation, column and beam details, definition of plans and programs.

The simulation and evaluation of the potential disadvantages of the structure to be measured with geometric patterns. Perfect geometry model can be generated with CAD services.

Applications can be describedbriefly as follows:

• Plan drawings and drawings with the founding of the column Schedules
• Machinery Foundation Drawings
• Structural Design Drafting
• layout of reinforced concrete structural framing concrete beam
• Girder Details
• Roof and floor framing
• Pre-stressed structure plans
• reinforced concrete chimney concrete
• Scale Retail
• curved structure of the page
• Bar Bending Schedule Structural ConcreteElements
• Pile foundation drawings

It 'also important to obtain maximum stability of buildings. But it also has advantages, such as the design of structural adjustment, which provides integrity and transparency between the customer and cost savings. So from this kind of advantages there are different contractors for use.

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