Market forms of steel

1) Angle Sections:

  • The angle sections may be of equal legs or unequal legs. 
  • Sizes varying from 20 mm x 20 mm x 3 mm to 200 mm x 200 mm x 25 mm. 
  • The corresponding weights per metre length are respectively 9 N and 736 N.

2) Channel Sections:

  • The channel sections consist of a web with two equal flanges. 
  • A channel section is designated by the height of web and width of flange. 
  • Sizes varying from 100 mm x 45 mm to 400 mm x 100 mm. 
  • The corresponding weights per metre length are respectively 58 N and 494 N
3) Corrugated Sheets:

  • These are formed by passing steel sheets through grooves. These grooves bend and press steel sheets and corrugations are formed on the sheets. 
  • These corrugated sheets are usually galvanized and they are referred to as the galvanized iron sheets or G.I. sheets. These sheets are widely used for roof covering.
4) Expanded Metal:

  • This form of steel is available in different shapes and sizes. 
  • It is prepared from sheets of mild steel which are machine cut and drawn out or expanded. 
  • A diamond mesh appearance is thus formed throughout the whole area of the sheet.

5) T-Sections:

  • The shape of this section is like that of letter T and it consists of flange and web. It is designated by overall dimensions and thickness. 
  • Sizes varying from 20 mm X 20 mm x 3 mm to 150 mm x 150 mm x 10 mm. 
  • The corresponding weights per metre length are 9 N and 228 N respectively.

6) I-Sections:

  • These are popularly known as the rolled steel joists or beams. It consists of two flanges connected by a web. 
  • It is designated by overall depth, width of flange and weight per metre length. 
  • Sizes varying from 75 mm x 50 mm at 61 N to 600 mm x 210 mm at 995 N.

7) Plates:

  • The plate sections of steel are available in different sizes with thickness varying from 5 mm to 50 mm. The corresponding weights per square metre are 392 N and 3925 N respectively.

8) Ribbed - Torsteel Bars:

  • These bars are produced from the ribbed which is a deformed high strength steel. 
  •  The corresponding weights per metre length as 2.22 N and 154.10 N.

9) Round Bars:

  • These are available in circular cross-sections with diameters varying from 5 mm to 250 mm.
  • They are widely used as reinforcement in concrete structures, construction of steel grillwork, etc. 
  • The corresponding weights per metre length as 1.50 N and 38 N respectively.

10) Square Bars:

  • These are available in square cross-section with sides varying from 5 mm to 250 mm. 
  • They are widely used in the construction of steel grillwork, for windows, gates, etc. 
  • The commonly use a cross-sections have sides varying from 5 mm to 25 mm with corresponding weights per metre length as 2 N and 49 N respectively.

11) Flat Bars:

  • These are available in suitable widths varying from 10 mm to 400 mm with thickness varying from 3 mm to 40 mm. 
  • They are widely used in the construction of steel grillwork for windows and gates.


HARIKRISHNAN A

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