ISA Weight Chart

ISA Weight Chart

Home » ISA Weight Chart
At Lakshya Steel, we bring decades of hands-on industry expertise to support engineers, structural designers, and procurement specialists in making accurate and confident decisions. Our comprehensive ISA weight chart is built in alignment with the IS 808:1989 standard ensuring that the data you rely on meets the precision and consistency expected in today’s construction and fabrication environments. We understand how a single miscalculation in weight can lead to overbudgeted projects, structural inefficiencies or regulatory setbacks making accurate, easy-to-access data absolutely vital.

This resource includes detailed weight per meter breakdowns for widely used angle sizes such as ISA 75x75x6, 65x65x6, 75x75x8 and more. Whether you’re planning load-bearing applications, estimating costs or sourcing materials, our ISA unit weight chart and ISA angle dimensions table serve as a trusted, ready reference. You’ll find values for flange width, thickness, cross-sectional area and weight per meter – all presented in a user-friendly format. By combining technical accuracy with practical usability, Lakshya Steel aims to be your go-to resource for steel structural specifications and smarter material planning.

What is ISA?

ISA stands for Indian Standard Angle, a type of L-shaped structural steel section widely used in construction and fabrication projects across India. These angles are manufactured and rolled in accordance with IS 808:1989, which defines the dimensions and mechanical properties for steel sections.

An ISA consists of two legs joined at a right angle (90°), and it comes in two primary forms:

  • Equal Angles: Both legs have the same length (e.g., ISA 50x50x6 mm)
  • Unequal Angles: One leg is longer than the other (e.g., ISA 75x50x6 mm)

These steel angles offer excellent strength, stability, and load-bearing capacity, making them ideal for:

  • Structural frameworks in buildings and bridges
  • Support brackets and reinforcement systems
  • Towers, sheds, cranes, and industrial equipment
  • Railings, shelving systems and general fabrication work

Due to their simple design and high structural efficiency, ISA sections are a go-to choice for engineers, architects and fabricators. They are available in a variety of sizes and thicknesses to suit both lightweight and heavy-duty applications.

Indian Standard Angle (ISA) Specifications

Indian Standard Angles (ISAs) are essential components in steel fabrication and construction due to their versatility, strength, and standardization as per IS 808:1989. These steel angles come in various sizes, shapes, and grades to suit different structural applications.

Specification Details
Available ISA Sizes From 75 mm up to 250 mm
Types
  1. Equal Angles
  2. Unequal Angles
  3. Bulb Angles
Common Equal Angle Size 130 x 130 x 8 mm
Common Unequal Angle Size 200 x 100 x 10 mm
Length Range Typically between 11 to 13 meters
Applications
  1. Structural frameworks
  2. Construction projects
  3. Bridge supports
  4. Warehouse shelving
  5. Equipment frames
Material Grades
  • Mild Steel: SS400, S235JR, Q235, SS490, ST37
  • HSLA Carbon Steel: A588, A572
Standard Shapes V-shaped and L-shaped configurations

HS Code of ISA Steel Section

The Harmonized System (HS) Code is an internationally standardized system of names and numbers used to classify traded products. For ISA (Indian Standard Angle) Steel Sections, the HS Code is critical for customs clearance, taxation, and export-import documentation.

The typical HS Code for ISA steel sections falls under:

Product Description HS Code GST Rate Notes
Iron or Non-Alloy Steel Angles, Shapes & Sections 7216.10 18% Covers equal and unequal angles under hot-rolled steel classification
Other Angles, Shapes & Sections (e.g., Alloy Steel) 7216.50 18% Applicable to special alloy or non-standard profiles

ISA Equal Angle Weight Chart in Kg & Sizes

Hot Rolled ISA weight Chart as per IS : 808, 1976 and Part V
Designation Thickness (mm) Size (mm X mm) ISA Weight per meter (in Kg)
ISA 2020 4 20 x 20 1.1
3 0.9
ISA 3030 3 30 x 30 1.4
4 1.8
5 2.2
ISA 5555 5 55 x 55 4.1
6 4.9
8 6.4
10 7.9
ISA 2525 3 25 x 25 1.1
4 1.4
5 1.8
ISA 3535 3 35 x 35 1.6
4 2.1
5 2.6
6 3
ISA 4545 3 45 x 45 2.1
4 2.7
5 3.4
6 4
IS4040 3 40 x 40 1.8
4 2.4
5 3
6 3.5
ISA 5050 3 50 x 50 2.3
4 3
5 3.8
6 4.5
7 5.15
8 5.82
ISA 6565 5 65 x 65 4.9
6 5.8
8 7.7
10 9.4
ISA 6060 4 60 x 60 3.7
5 4.5
6 5.4
8 7
10 8.6
ISA 7575 5 75 x 75 5.7
6 6.8
8 8.9
10 11
ISA 100100 6 100 x 100 9.2
6.5 9.99
8 12.1
10 14.9
12 17.7
15 21.9
ISA 7070 5 70 x 70 5.3
6 6.3
7 7.38
8 8.3
10 10.2
ISA 9090 6 90 x 90 8.2
8 10.8
10 13.4
12 15.8
ISA 200200 12 200 x 200 36.9
16 48.5
20 60
24 71.1
25 73.9
ISA 110110 8 110 x 110 13.4
10 16.6
12 19.7
16 25.7
ISA 8080 6 80 x 80 7.3
8 9.6
10 11.8
12 14
ISA 130130 8 130 x 130 15.9
10 19.7
12 23.5
16 30.7
ISA 120120 8 120 x 120 14.7
10 18.2
12 21.6
15 26.6
ISA 180180 15 180 x 180 40.9
18 48.6
20 53.7
ISA 150150 10 150 x 150 22.9
12 27.3
15 33
16 35.8
18 40.1
20 44.1

Angle Weight per Foot in Kg

ISA Angle
Size ISA 50 x 50 x 6 ISA 65 x 65 x 6 ISA 65 x 65 x 8 ISA 65 x 65 x10 ISA 75 x 75 x 6 ISA 75 x 75 x 8 ISA 75 x 75 x 10 ISA 90 x 90 x 6 ISA 90 x 90 x 8 ISA 90 x 90 x 10 ISA 100 x 100 x 8
Weight (Kgs. Per Feet) 1.371 1.768 2.347 2.865 2.073 2.713 3.353 2.5 3.292 4.085 3.689
Size ISA 100 x 100 x 10 ISA 100 x 100 x 12 ISA 110 x 110 x 10 ISA 110 x 110 x 12 ISA 130 x 130 x 10 ISA 130 x 130 x 12 ISA 150 x 150 x 16 ISA 150 x 150 x 20 ISA 200 x 200 x 16 ISA 200 x 200 x 20
Weight (Kgs. Per Feet) 4.542 5.396 5.06 6.006 6.006 7.134 10.914 13.445 14.786 18.292

ISA Angle Size Chart

ISA (Indian Standard Angles) are widely used in steel structures, construction, and engineering applications. These angles are available in equal and unequal configurations, and are defined under two key Indian Standards: IS 2062:2011 (for structural steel) and IS 808:1989 (for dimensions and weights of hot-rolled steel sections).

ISA Equal Angles (as per IS 2062:2011)

Size (mm) Thickness (mm) Weight per Meter (kg/m)
25×25 3 1.12
40×40 5 3.13
50×50 5 3.80
65×65 6 6.96
75×75 6 8.10
90×90 8 12.92
100×100 10 18.00

ISA Unequal Angles (as per IS 2062:2011)

Size (mm) Thickness (mm) Weight per Meter (kg/m)
50×30 4 2.46
75×50 6 7.10
100×75 8 13.10
125×75 8 14.50
150×90 10 21.60
200×100 12 34.20

ISA Equal Angles (as per IS 808:1989)

Size (mm) Thickness (mm) Weight per Meter (kg/m)
20×20 3 0.90
25×25 3 1.10
30×30 3 1.40
40×40 4 2.40
50×50 5 3.80
60×60 6 5.60
65×65 6 6.10
70×70 6 6.60
75×75 6 7.10
80×80 8 10.40
90×90 8 11.90
100×100 8 13.40
100×100 10 16.50
110×110 10 18.20
130×130 10 21.70
150×150 12 33.90
200×200 15 55.60

ISA Unequal Angles (as per IS 808:1989)

Size (mm) Thickness (mm) Weight per Meter (kg/m)
30×20 3 1.20
40×25 4 2.00
45×30 5 3.00
50×30 5 3.10
60×40 5 4.40
65×50 6 6.10
75×50 6 6.70
80×50 6 7.20
90×60 6 8.30
100×65 6 9.20
100×75 8 13.30
125×75 8 14.50
150×90 10 21.90
200×100 12 34.20
250×90 12 38.10

ISA Unequal Angle Size Chart

Unequal angle H x W x t 30 x 20 x 3 30 x 20 x 4 40 x 20 x 3 40 x 20 x 4 40 x 25 x 4 45 x 30 x 4 45 x 30 x 5 50 x 30 x 5 50 x 30 x 6 50 x 40 x 4 50 x 40 x 5
weight kg/m 1.14 1.49 1.38 1.8 1.97 2.3 2.82 3.02 3.58 2.77 3.4
surface area
m2/m		 0.097 0.097 0.117 0.117 0.127 0.146 0.146 0.156 0.156 0.177 0.177
Unequal angle H x W x t 75 x 65 x 6 75 x 50 x 9 75 x 65 x 8 75 x 65 x 10 80 x 40 x 6 80 x 40 x 8 80 x 60 x 6 80 x 60 x 7 80 x 60 x 8 80 x 65 x 6 80 x 65 x 8
weight kg/m 6.49 8.4 8.48 10.5 5.51 7.21 6.49 7.5 8.48 6.73 8.8
surface area
m2/m		 0.273 0.244 0.273 0.273 0.234 0.234 0.273 0.273 0.273 0.283 0.283
Unequal angle H x W x t 120 x 80 x 8 120 x 80 x 10 120 x 80 x 12 130 x 65 x 8 130 x 65 x 10 130 x 65 x 12 130 x 75 x 8 130 x 75 x 10 130 x 75 x 12 130 x 90 x 10 130 x 90 x 12
weight kg/m 12.4 15.3 18.2 12.1 14.9 17.7 12.7 15.7 18.6 17 20
surface area
m2/m		 0.391 0.391 0.391 0.381 0.381 0.381 0.401 0.401 0.401 0.43 0.43

ISA Angles Tolerance

Section ANGLES (L Shapes)
Nominal Size (in) 1 and under Over 1 to 2, incl Over 2 to 3, excl 3 to 4, incl Over 4 to 6, incl Over 6
Length of Leg (in) Over 1/32 3/64 1/16 1/8 1/8 3/16
Under 1/32 3/64 1/16 3/32 1/8 1/8
Thickness Out of Square per inch of leg (in) 3/1282 3/1282 3/1282 3/1282 3/1282 3/1282
Variations from thickness given (Over and Under) 3/16 and under 0.008 0.01 0.012 – – –
Over 3/16 to 3/8 incl 0.01 0.01 0.015 – – –
Over 3/8 – 0.012 0.015 – – –

ISA Angle Dimensions

ISA Equal Angle
Size (in * in)         10 x 10 8 x 8 6 x 6 5 x 5
Depth (h) 12 x 12 10 10 10 10 10 10 8 8 8 8 8 8 8 6 6 6 6 6 6 6 6 6 5 5 5 5 5 5 5
Thickness S (in) 12 12 12 12 1 3/8 1 1/4 1 1/8 1 07/8 03/4 1 1/8 1 07/8 03/4 05/8 9/16 01/2 1 07/8 03/4 05/8 9/16 01/2 7/16 03/8 5/16 07/8 03/4 05/8 01/2 7/16 03/8 5/16
Sectional Area (in2) 1 3/8 1 1/4 1 1/8 1 25.6 23.5 21.2 19 16.7 14.4 16.7 15 13.2 11.4 9.6 8.7 7.8 11 9.7 8.4 7.1 6.4 5.8 5.1 4.4 3.7 8 6.9 5.9 4.8 4.2 3.6 3
Weight (lbf/ft) 30.9 28.3 25.6 22.9 87.1 79.9 72.3 64.7 56.9 49.1 56.9 51 45 38.9 32.7 29.6 26.4 37.4 33.1 28.7 24.2 21.9 19.6 17.2 14.9 12.4 27.2 23.6 20 16.2 14.3 12.3 10.3
Static Para (Moment of Inertia (in4) 105 96.4 87.2 77.8 232.1 215.1 196.2 177.3 157.6 137.2 98 89 79.6 69.7 59.4 54.1 48.6 35.5 31.9 28.2 24.2 22.1 19.9 17.7 15.4 13 17.8 15.7 13.6 11.3 10 8.74 7.42
Size (in * in) 4 x 4 3 1/2 x 3 1/2 3 x 3 2 1/2 x 2 1/2 2 x 2
Depth (h) 4 4 4 4 4 4 4 3 1/2 3 1/2 3 1/2 3 1/2 3 1/2 3 3 3 3 3 3 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 2 2 2 2
Thickness S (in) 03/4 05/8 01/2 7/16 03/8 5/16 01/4 01/2 7/16 03/8 5/16 01/4 01/2 7/16 03/8 5/16 01/4 3/16 01/2 03/8 5/16 01/4 3/16 03/8 5/16 01/4 3/16 01/8
Sectional Area (in2) 5.4 4.6 3.8 3.3 2.9 2.4 1.9 3.3 2.9 2.5 2.1 1.7 2.75 2.43 2.11 1.78 1.44 1.09 2.25 1.73 1.46 1.19 0.9 1.36 1.15 0.94 0.72 0.48
Weight (lbf/ft) 18.5 15.7 12.8 11.3 9.8 8.2 6.6 11.1 9.8 8.5 7.2 5.8 9.4 8.3 7.2 6.1 4.9 3.7 7.7 5.9 5 4.1 3.1 4.7 3.9 3.2 2.4 1.7
Static Para (Moment of Inertia (in4) 7.67 6.66 5.56 4.97 4.36 3.71 3.04 3.64 3.26 2.87 2.45 2.01 2.22 1.99 1.76 1.51 1.24 0.96 1.23 0.98 0.85 0.7 0.55 0.48 0.42 0.35 0.27 0.19

ISA Angle Unit Weight

The unit weight of an Indian Standard Angle (ISA) plays a vital role in structural calculations, cost estimation, and transportation planning. The weight is typically measured in kilograms per meter (kg/m) and depends on the size and thickness of the angle section.

ISA angles are available in both equal and unequal leg dimensions, and each combination has a specific unit weight derived from standard formulas. The weight per meter is calculated using the formula:

Weight (kg/m) = (Sectional Area in mm² × Density of Steel) / 1,000,000
 Where:

  • Density of steel = 7.85 g/cm³ (or 7850 kg/m³)
  • Sectional area is derived from the leg sizes and thickness.

For example:

  • A 50×50×5 mm equal angle weighs approximately 3.8 kg/m
  • A 100×75×8 mm unequal angle weighs approximately 13.1 kg/m

These standardized weights are as per IS 808:1989 and IS 2062:2011 specifications and are crucial for structural engineers, fabricators, and procurement teams during planning and implementation of construction projects.

Frequently Asked Questions About ISA Weight Chart

What is an ISA section in steel?
ISA stands for Indian Standard Angle, a type of steel angle section used in structural and construction applications. It is available in equal and unequal leg forms.
Where are ISA steel angles commonly used?
They are widely used in bridges, construction frameworks, warehouse racks, support structures, and other structural steel applications.
What is the difference between equal and unequal ISA angles?
Equal angles have both legs of the same length (e.g., 100×100 mm), while unequal angles have different leg lengths (e.g., 100×75 mm), suitable for different structural requirements.
What are the standard sizes available in ISA angles?
ISA angles generally range from 75 mm to 250 mm, with various thicknesses. They come in equal, unequal, and bulb angle forms.
Can ISA angles be galvanized or coated?
Yes, ISA angles can be galvanized or coated with paint or other protective layers to prevent corrosion, especially for outdoor or marine applications.
Request A Quote

    Talk To Us – We’re Here To Help

    [hidden post-url default:shortcode[_post_url]]

    Fill the Captcha

    Our Products

    Our Latest Blogs
    Enquire Now
    close slider

      Enquire Now

      Need pricing or technical specs?

      [hidden post-url default:shortcode[_post_url]]

      Fill the Captcha