MARKET FORMS OF STEEL- BLOG -11

 Following are the forms of steel available in current market: 

(1) Angle Sections:

The angle sections are extensively used in the structural steelwork especially in the construction of steel roof trusses and filler joist floors.

The equal angle sections are available in sizes varying from 20 mm x 20 mm x 3 mm to 200 mm x 200 mm x 25 mm. 

The unequal angle sections are available in sizes varying from 30 mm x 20 mm x 3 mm to 200 mm x 150 mm x 18 mm

(2) Channel Sections:

The channel sections consist of a web with two equal flanges as shown in fig. 11-5. A channel section is designated by the height of web and width of flange. 

These sections are available in sizes varying from 100 mm x 45 mm to 400 mm x 100 mm. 

The Bureau of Indian Standards has classified channel sections as junior channel, light channel and medium channel and accordingly they are designated as I.S.J.C., I.S.L.C. and I.S.M.C. respectively.

(3) Corrugated 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.

These grooves bend and press steel sheets and corrugations are formed on the sheets. 

(4) Expanded Metal:

This form of steel is available in different shapes and sizes. A diamond mesh appearance is thus formed throughout the whole area of the sheet.

The expanded metal is widely used for reinforcing concrete in foundations, roads, floors, bridges, etc. It is also used as lathing material and for partitions.

(5) T-Sections:

The shape of this section is like that of letter T and it consists of flange and web These sections are available in 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. They are available in various sizes varying from 75 mm x 50 mm at 61 N to 600 mm x 210 mm at 995 N.

The wide flange beams are available in sizes varying from 150 mm X 100 mm at 170 N to 600 mm x 250 mm at 1451 N. The beams suitable for columns are available in H-sections which vary in sizes from 150 mm x 150 mm at 271 N to 450 mm x 250 mm at 925 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) Round Bars:

These are available in circular cross-sections with diameters varying from 5 mm to 250 mm.The commonly used cross-sections have diameters varying from 5 mm to 25 mm with the corresponding weights per metre length as 1.50 N and 38 N respectively.

They are widely used as reinforcement in concrete structures, construction of steel grillwork, etc.

(9) Square Bars:

These are available in square cross-section with sides varying from 5 mm to 250 mm.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.

 They are widely used in the construction of steel grillwork, for windows, gates, etc.

(10) 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.

BLOG BY ASHRAF

REFERNCE:

https://www.engineeringenotes.com/metallurgy/steel/market-forms-of-steel-materials-engineering/46759