Tubular and steel Structures

TUBULAR STRUCTURE

Supremacy of Tubular or Hollow structural can be ascertained by looking at mother nature. Nature is known to optimise on all kinds of material requirements, particularly of the important load supporting members. Its economy without sacrifice of usefulness is reflected in the hollowness of bones in the structural system of living beings specially human body. A cursory glance to the technological developments shows that engineers and technologists have. Only in the later half of 29th century, become aware of the optimal natural systems and started adapting hollow structural components.

Tubular section have been in use in the technological advanced countries for quite some time. It is now in the entire length and breadth of all countries that the designers are turning on to hollow sections because of its light weight, efficiency and harmony with the enviroment.

APPLICATION

Tubular structure has an endless application, to name only few are (I) Roof trusses, among which ordinary roof truss, north light truss, portal truss and space truss are getting increasingly popular. (II) Scaffolding, for which sky is the limit. (III) Laticed girders. (IV) Transmission towers, etc. etc.

SUPERIORITY OF TUBES

Compression members are designed essentially from the point of view of its maximum slenderness ration. Conventional rolled section like angles, joists, channels have very low radius of gyration about its weaker axis causing higher slenderness ratio consequently lowering its. The disadvantage is overcome when tubular sections are used and hence adaption of a lighter weight member resulting both in economy and elegance becomes possible.

Prefabrication is achieved by welded joints in tubular structures. For members in tension for such welded joints gross area of the tube is effective. While in case of conventional angle sections only a portion of the unconnected leg is considered effective apart from deductions due to the pressure of bolt or rivet holes. Thus, for any loading system sectional area consequently weight required in a tube will be less making it more economical to use. Also, members are very often subjected to reversal of stresses where by tubular sections will prove to be of added advantage.

In Torson, it is needless to point out the advantages and superiority of tubular sections over conventional angle section. From the point of view of corrosion. The tubes are subjected to corrosion on the other surface only, because of having the ends sealed. So, protection by means of paints and other processes involve a lesser surface area on the outside face only which is reflected in the code of practice allowing less wall thickness for tibes than in conventional sections. It is thus imperative that to utilise the steel resources and achieve aconomy large scale. Use of tubular structures should be recomended.

ADDITIONAL SECTIONS& ASSITANCE FOR MODERN BUILDERS

As an architect, builder or designer, one knows how different shapes and sizes structural construction can be rectangular and square hollow sections (RHS & SHS) are two recent break through in structural aids such sections have already been in use in advanced countries for quite some time and now being here when it is demanded. Indian Tube has already started manufacturing and using such sections in structures because of its superiorty in jointing procedures and aesthetics. When customer, designer or a pure aesthetic consideration demand such use of RHS and SHS of M/S. The Indian Tube Co. Ltd. products are offered for its endless applications.

TUBULAR STEEL STRUCTURES STANDARD RANGE

Design Truss Type Portal Frame Saw Tooth Umbrella Shed Cycle Shade
Nominal Span 5.89M (19'-4")
6.14M- 8.22M (20'-27')
9.14M-10.66M(30'-35')
12.19M-13.71M(40'-44')
15.24M-18.28M(50'-60')
21.33M-24.38M(70'-80')
15.24M(50'-0")
18.28M(60'-0")
21.33M(70'-0")
24.38M(80'-0")
39.62M(130'-0")
5.79M (19'-0")
7.62M(25'-0")
9.14M(30'-0")
4.87M (16'-0")
5.79M(19'-0")
4.04M(13'-0")
For Cycle Shade
Bay Length 3.04M(10'-0")
3.65M(12'-0")
4.06M(13'-4")
4.50M(15'-0")
3.65M(12'-0")
4.06M(13'-4")
4.57M(15'-0")
4.87M(16'-0")
3.04M(10'-0")
3.65M(12'-0")
4.06M(13'-4")
3.04M(10'-0")
Height To Eaves 3.65M(12'-0")
4.26M(14'-0")
4.87M(16'-0")
4.87M(16'-0")
5.48M(18'-0")
6.09M(20'-0")
3.65M(12'-0")
4.26M(14'-0")
4.87M(16'-0")
2.0M(6'-7")
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