Low Cost Steel Detailing and Structural Steel Design Services

Outsourcing Steel Detailing firm is a leading steel design service provider company specializing in steel structure designing & steel detailing services. They offer custom-tailored 2D & 3D Steel Designing & Detailing solutions to help you turn today's challenges in to competitive advantage. They use application like AutoCAD, AutoSketch, Revit, Tekla, etc & web-based collaborating tools to provide you the benefits of low operating cost, superior services & efficient delivery schedule.

Steel structures are widely used in steel building designs & construction of residential steel building design. Structural Steel detailing is useful for all kind of steel structures ranging from residential buildings to massive commercial buildings. Steel structures can be designed or planned basically with less hard work & provides advantages like sturdiness, durability & portability. Structural steel services include designing dimensions & detailing of various Post-tensioned, Precast concrete detailing, Pre-stressed & Composite steel structures in accordance with industry standards & codes.

They have a massive pool of highly qualified steel detailers & structural steel engineers producing correct drawings of each structural element, their placements, connections between them & exact dimensions. This involves detailing of steel staircases, beams, plates, columns, bar joists, stack, decking/grating, etc. Our methodology is well defined & technique & result oriented. They put our best hard work to establish fruitful business partnership with our clients by ensuring exact, correct, high quality steel detailing services within the budget & on time.

They provide structural steel designs for industrial structures such as:
Steel buildings
Residential/Commercial buildings
Residential Steel framing
Warehouses
Sheds/Shelters/Roofs
Office blocks
Support structures
Floor systems/Mezzanines,
Miscellaneous Steel structures

Factors to be considered in the design of steel structures

All the members in the structure ought to have adequate strength, stiffness & toughness to be sure proper funtioning in the work of service life. Members ought to have adequate strength, stiffness & toughness to be sure propoer functioning in the work of service life.

Reserved strength must be obtainable to cater for:

Aim is to prevent limit state from being reached.
one. Adaptations to site:

Occasional overloads - underestimated lots
Variability of strebgth of materials from those specified.
Variation in strength due to workmanship, construction practices.

If the structure is a building, for example, the designer must generate a plan that has suitable arrangement for rooms, corridors, stairways, windows, elevators, emergency exits etc & all this plan ought to be adapted to site so that it is feasible, accepted aesthetically & at a reasonable cost. This is called funtional planning.
two. Structural system:

structural system is dependent on funtional planning. Structural system includes the location of columns in the buildings, it is to be worked out with the funtional plan & sufficent space must be anticipated between completed ceiling & completed floor for location of columns.
three. Structural analysis:

One time lots are defined & design is laid out, structural analysis must be performed to choose internal forces that will be produced in various members of the framework. Assumptions must be made & it ought to be ensured that structure in point of fact also behaves as it is meant to (& as it was assumed to behave).
four. Proportionality of members:

Members must be proportioned with factor of safety in mind.
five. Factor of safety:

Variability of the material with respect to strength & other physical properties
Uncertainity in the expected lots
Precision with which internal forces are calculated
Possibility of corrosion
Extent of damage, loss of life
Operational importance
Quality of workmanship

The development of design specifications to provide suitable values of the margin of safety, reliability & probability of failure must take in to consideration the following factors.

Advantages of LRFD

LRFD accounts for both variability in load and resistence. It achieves uniform levels of safety for different limit states.
Comparison of ASD & LRFD

Advantages of LRFD

ASD is the simple technique & LRFD is the sophisticated.
ASD combines dead and live lots and treats them in the same way.
In lrfd different load factors are assigned to dead lots and live lots, which is appealing.
Changes is load factors and resistence factors are much simpler to make in lrfd.

Mechanical properties of structural steel

Material
Length
X-section

Resistence to deformation based on:

Design technique

Preliminary member sizing of beams
Structural analysis - modeling, analysis
Design review - member modifications
Cost of estimation
Preparation of structural drawings and specifications
Lots for structural analysis and design
Dead load
Live load
Mean return period OR
Recurrence interval OR
Live lots for various occupencies
Reduction in basic design live load
Impact Load
Wind load

Load & Resistence Factor Design

It considers the variability not only in resistence but also in the effects of load.
Provides measure of safety relative.
Safety in the design is obtained by specifying that the reduced nominal strength of a designed structure is less than the effect of factored lots acting on the structure.

Redundancy:

Ability of a structure to go through in-elastic deformation without rupture.

Ductility:

It is the ability to resist abrasion.

Steel Strength:

it is the ability to redistribute the load. Simple beam is determinate. Fixed beam is indeterminate by two degrees so it's redundant actions. fixed supported beam is more better as indeterminate structure can redistribute the load. When load increases support becomes plastic & it turns in to a basically supported beam. But basically supported does not go through the stage of plastic hinge they fail directly.
Hardness:

Ability of a structure or structural part to absorb energy.
Fatigue:

Maximum load which an object can resist. OR it is the maximum load that the steel can resist before failure. Steel is said to be failed when it's yielded. It is thus called yield strength
Toughness:

It is a progressive, localized permanent destroy under fluctuating stress.

Structural Steel Design & Construction of Steel Structures

Design philosophies

A. Allowable stress design
B. working stress design (for concrete)
C. final stress design


What is meant be the design of structures?
Is it an arbitrary or scientific technique?
How to design a structural technique?
Parameters involved in the design?
What is meant by demand on structural technique & what is capacity of a structure?
Is demand related to capacity?

What are the requirements of steel design?

Topics to be studied & ideas to be learned

Demands: Snow, earthquake, live load etc.
Limit state:

A condition beyond which a structural technique or a structural part ceases to fulfill the funtion for which it is designed.
Examples of limit states :

A. Deflection
B. Fatigue
C. Shear
D. Buckling
E. Bearing
F. Cracking
G. Flexure
H. Torsion
I. Settlement
J. Stability

Strength limit states :
A. Flexure
B. Shear
C. Torsion

Serviceability limit states :
A. Cracking
B. Excessive deflection