MARKET FORMS OF STEEL
MARKET FORMS OF STEEL
The
angle sections may be of equal legs or unequal legs
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 corresponding weights per metre length are respectively 9 N and 736
N.
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.
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.
These sections are available in sizes varying from 100 mm x 45 mm to 400 mm x 100 mm.
The
corresponding weights per metre length 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 are respectively 58 N and 494 N.
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.
Expanded Metal:
This form of steel is available
in different shapes and sizes. Fig. 11-6 shows a plain expanded metal. 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.
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.
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. 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.
T-section
of size 100 mm X 100 mm x 10 mm with weight per metre length as 150 N. The
special T-sections with unequal sides, bulbs at the bottom edge of web, etc.
are also available. These sections are widely used as members of the steel roof
trusses and to form built-up sections.
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. 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.
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.
They are used mainly for the
following purposes in the structural steelwork
Ribbed (HYSD) Bars:
These bars are produced from
the ribbed which is a deformed high strength steel. These bars have ribs or
projections on their surface and they are produced by controlled cold twisting
of hot-rolled bars. Each bar is to be twisted individually and it is tested to
confirm the standard requirements. These bars are also called High Yield
Strength Deformed (HYSD) bars.
The ribbed (HYSD) bars are
available in sizes varying from 6 mm to 50 mm diameter, with the corresponding
weights per metre length as 2.22 N and 154.10 N.
Reference;
https://www.indianconstructionindustry.com/indian_construction_topics/market_forms_of_steel.html
Aafiyah Muskaan
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