DIFFERENT ROLLED STEEL SECTIONS -SHAPES, SIZES AND PROPERTIES FOR CONSTRUCTION Rolled steel sections are available in various forms for use in Steel Construction. Shapes, sizes and properties of these rolled steel sections, Different steel members are manufactured in the factories based their usage. Rolled steel sections are casted in continuous casting molds without any joints.
VARIOUS FORMS OF ROLLED STEEL SECTIONS: Angle
sections Channel sections T- sections Round bars Square bars Flat bars Corrugated sheets Plates Thermo-mechanically treated bars
ANGLE SECTIONS Angle sections are manufactured in “L� shape. It contains two legs. Some angle sections contains legs with similar dimensions are called as equal angle sections and some contains different legs are called as unequal angle sections. Angle sections are widely used for roof truss constructions and for filler joist floors.
CHANNEL SECTIONS The channel section or C- section consists two equal flanges connected to web at both ends. Channel sections are extensively used in steel framed structures. They are available in various sizes ranging from 100 mm x 45 mm to 400 mm x 100 mm. Corresponding unit weights are 58 N and 494 N per meter length respectively.
T SECTIONS T section consists of flange and web arranged in “T� shape. They are used in steel roof trusses to form built up sections. Two angle sections can also be joined to get T section. Rolled T sections size varies from 20 mm x 20 mm x 3 mm to 150 mm x 150 mm x 10 mm with 9 N and 228 N as their corresponding weights per meter length.
ROUND BARS Round bars contain circular cross sections and these are used as reinforcement in concrete and steel grill work etc. Stainless Steel Round bars are available in various diameters varies from 5 mm to 250 mm.
SQUARE BARS Square bars contain square cross sections and these are widely used for gates, windows, grill works etc. the sides of square cross section ranges from 5 mm to 250 mm. They are available in various materials and grades like stainless steel square bars, carbon steel, alloys steel etc.
FLAT BARS Flat bars are also used for gates, windows, grill works etc. Stainless Steel Flat bars are designated with width of the bar which varies from 10 mm to 400 mm. thickness of flat bars will be from 3 mm to 40 mm.
CORRUGATED SHEETS Plain steel sheets are passed through machines which produce bends by pressing them called corrugations. These sheets are used for roof coverings.
STEEL PLATES Steel plates are well used items in steel structures. They are used for connecting steel beams, tensional member in roof truss etc. They are designated with their thickness which is varying from 5 mm to 50 mm.
THERMO-MECHANICALLY TREATED (TMT) BARS Thermo-mechanically treated bars or TMT bars are manufactured by a special technique in which the red-hot steel bars are suddenly quenched by spraying water on it. So, surface of bar gets cooled down and inner side or core of the bar still in hot condition. The core helps the outer surface to be tempered. By this combination of different temperature, the bar gains more yield strength and exhibits good elongation at ultimate failure. Copper, phosphorous and chromium etc. are added in manufacturing process of TMT bars which improves its corrosion resistance.