The most comprehensive weight chart angle in kg per metre — covering all standard ISA equal angle sizes from 20×20×3 to 200×200×25 mm, plus all major unequal angle sizes, as per IS 808:1989. Free reference for fabricators, contractors, structural engineers, and project estimators across India.
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Send EnquiryFill the contact form Join WhatsApp ChannelDaily rate updatesThis page provides the definitive weight chart angle for all standard MS equal and unequal angle sections as per IS 808:1989. Whether you are preparing a Bill of Quantities, estimating freight weight, or comparing per-tonne rates across different ISA sizes — this weight chart angle gives you accurate, standard-compliant data for every section from ISA 20×20×3 to ISA 200×200×25, and major unequal angles from ISA 65×45 to ISA 200×150. All values are based on IS 808:1989 nominal dimensions at steel density 7.85 g/cm³.
Indian Standard Angle (ISA) • IS 808:1989 • Equal & Unequal Legs • Hot Rolled
An MS angle — officially called an ISA (Indian Standard Angle) — is an L-shaped hot-rolled structural steel section. It comes in two varieties: equal leg (both legs the same length) and unequal leg (two different leg lengths). The angle is one of the most versatile structural steel sections in India — used in virtually every category of construction, fabrication, and infrastructure work. This weight chart angle covers both equal and unequal ISA sections as per IS 808:1989.
MS angles are produced by hot rolling — a steel billet heated to rolling temperature is progressively shaped through roll passes that form the L-profile. The web-leg junction carries a natural root radius from the rolling process. Finished sections are straightened, cut to standard lengths (typically 6 metres per piece for commercial grades, 10–13m for heavy structural grades), and bundled for dispatch.
IS 808:1989 specifies exact dimensions for leg length, thickness, root radius, and toe radius. Material grade is governed by IS 2062:2011 — most commonly Grade E250 (Fe 410) for general structural and fabrication use.
Steel is transacted by the tonne at mill and wholesale level — but used and estimated by the metre at the project site. The weight chart angle converts between these two worlds. It lets you:
• Convert a per-tonne mill price into a per-metre or per-piece cost
• Estimate total freight weight and cost for a project consignment
• Prepare accurate Bill of Quantities (BOQ) for structural steel tenders
• Verify that delivered material matches the declared IS 808 specification
• Compare the cost-efficiency of different leg sizes and thicknesses
An accurate weight chart angle saves procurement teams from costly over- or under-ordering — and ensures supplier quotes are evaluated on an equal basis.
Leg A (and B for unequal) • Thickness t • Root Radius r₁ • Toe Radius r₂ • Centroid
Every value in the weight chart angle is derived from the leg dimensions and thickness of the section. The diagram below shows the equal and unequal angle cross-sections and labels each parameter that feeds into the weight calculation.
Leg Length A (Equal Angle): The length of each leg from the outer toe to the outer heel, in mm. For ISA 75×75, A = 75mm on both legs. This is the primary number in the section designation and the dominant driver of weight.
Leg Lengths A & B (Unequal Angle): For unequal angles, A = longer leg, B = shorter leg. Example: ISA 100×75 has A = 100mm, B = 75mm. Both legs have the same thickness t.
Thickness (t): The uniform thickness of both legs in mm. This is the second most important weight variable — doubling thickness nearly doubles weight for the same leg size. Always specify thickness explicitly when ordering.
Root Radius (r₁): The fillet radius at the inner junction of the two legs — a rolling process artefact. IS 808 specifies r₁ for each angle size. It adds material at the corner and is included in all tabulated weights in the weight chart angle.
Centroid Position: For an equal angle, the centroid lies on the line of symmetry (Cx = Cy). For an unequal angle, Cx ≠ Cy — the centroid is closer to the longer leg. This asymmetry means unequal angles are more efficient when the longer leg is oriented in the bending plane, and less efficient in the other direction.
IS 808:1989 permits ±3% on leg length and +3%/−5% on thickness for individual pieces. Always verify thickness with a caliper for structural-grade orders and request an MTC.
ISA A×A×t • 20×20 to 200×200 mm • All Standard Thickness Options
The following weight chart angle table covers all standard equal-leg ISA sizes as per IS 808:1989. Weights are in kg per metre. Each size is shown with all available standard thickness options. Colour coding: ■ light, ■ medium, ■ heavy. Popular sizes are highlighted.
| ISA Size (A × A mm) |
3mm kg/m |
4mm kg/m |
5mm kg/m |
6mm kg/m |
8mm kg/m |
10mm kg/m |
12mm kg/m |
16mm kg/m |
|---|---|---|---|---|---|---|---|---|
| → Small Equal Angles — 20×20 to 35×35 mm | ||||||||
| 20 × 20 | 0.88 | — | — | — | — | — | — | — |
| 25 × 25 | 1.11 | — | 1.77 | — | — | — | — | — |
| 30 × 30 | 1.36 | 1.78 | — | — | — | — | — | — |
| 35 × 35 | — | 2.09 | 2.54 | — | — | — | — | — |
| → Medium-Small Equal Angles — 40×40 to 55×55 mm | ||||||||
| 40 × 40 | 1.83 | 2.42 | 2.97 | 3.52 | — | — | — | — |
| 45 × 45 | — | — | 3.37 | 4.00 | — | — | — | — |
| 50 × 50 ★ POPULAR | 2.26 | — | 3.77 | 4.47 | — | — | — | — |
| 55 × 55 | — | — | 4.14 | 4.94 | — | — | — | — |
| → Most Popular Equal Angles — 60×60 to 90×90 mm | ||||||||
| 60 × 60 ★ POPULAR | — | — | 4.47 | 5.42 | 7.09 | — | — | — |
| 65 × 65 | — | — | — | 5.84 | 7.70 | — | — | — |
| 75 × 75 ★ POPULAR | — | — | 5.65 | 6.84 | 9.00 | 11.00 | — | — |
| 80 × 80 | — | — | — | 7.34 | 9.63 | 11.90 | — | — |
| 90 × 90 | — | — | — | 8.30 | 10.90 | 13.40 | — | — |
| → Standard Structural Equal Angles — 100×100 to 130×130 mm | ||||||||
| 100 × 100 ★ POPULAR | — | — | — | 9.22 | 12.20 | 15.10 | 17.80 | — |
| 110 × 110 | — | — | — | — | 13.40 | 16.60 | 19.70 | — |
| 130 × 130 | — | — | — | — | 15.90 | 19.70 | 23.50 | — |
| → Heavy Structural Equal Angles — 150×150 to 200×200 mm | ||||||||
| 150 × 150 | — | — | — | — | — | 22.80 | 27.30 | 35.80 |
| 200 × 200 | — | — | — | — | — | — | 36.90 | 48.50 |
All values in this weight chart angle are nominal/theoretical weights derived from IS 808:1989 standard dimensions at steel density 7.85 g/cm³. Actual weights may vary within IS 808 tolerance limits. For freight billing, verify on a weigh-bridge. For BOQ, include a 3–5% tolerance margin above the chart value.
Long Leg × Short Leg × Thickness • Nominal Weight kg/m
Unequal angles carry more material in one direction — the longer leg — making them more efficient as beam flanges, lintels, and stiffeners than equal angles of the same weight. The following weight chart angle for unequal sections covers all principal ISA A×B sizes as per IS 808:1989.
| ISA Unequal Size (A × B mm) |
5mm kg/m | 6mm kg/m | 8mm kg/m | 10mm kg/m | 12mm kg/m |
|---|---|---|---|---|---|
| → Small Unequal Angles | |||||
| 65 × 45 | 4.00 | 4.75 | — | — | — |
| 75 × 50 | 4.56 | 5.46 | 7.12 | — | — |
| → Medium Unequal Angles | |||||
| 80 × 50 | 4.84 | 5.80 | 7.57 | — | — |
| 100 × 75 ★ POPULAR | — | 7.92 | 10.40 | 12.90 | — |
| 100 × 65 | — | 7.34 | 9.63 | 11.90 | — |
| → Large Unequal Angles | |||||
| 125 × 75 | — | 9.00 | 11.90 | 14.70 | 17.50 |
| 150 × 75 ★ POPULAR | — | 10.60 | 14.00 | 17.40 | 20.70 |
| 150 × 115 | — | — | 16.80 | 20.90 | 24.90 |
| 200 × 100 | — | — | — | 22.90 | 27.30 |
| 200 × 150 | — | — | — | 27.30 | 32.60 |
When ordering unequal angles, always specify: ISA [Long leg] × [Short leg] × [thickness], e.g. "ISA 100×75×8". The long leg is always stated first. If you reverse the designation, you may receive the correct section orientated incorrectly — which matters for sections used as lintels or stiffeners where the longer leg must face a specific direction. Always indicate orientation on fabrication drawings.
Standard Formula • Equal & Unequal Angle • Three Worked Examples
You can calculate the approximate weight of any MS angle — equal or unequal — using a standard engineering formula. This is the same basis behind every value in this weight chart angle. Understanding it means you can estimate non-standard or custom angle sizes independently.
Given: A = 75 mm, t = 6 mm
Weight = 0.00785 × 6 × (2 × 75 − 6)
= 0.00785 × 6 × 144
= 0.00785 × 864
= 6.78 kg/m
IS 808 tabulated value: 6.84 kg/m. Difference ≈ 0.9% — root radius correction. For project estimation, use the IS 808 table value from this weight chart angle.
Given: A = 100 mm, B = 75 mm, t = 8 mm
Weight = 0.00785 × 8 × (100 + 75 − 8)
= 0.00785 × 8 × 167
= 0.00785 × 1,336
= 10.49 kg/m
IS 808 tabulated value: 10.40 kg/m. Minor rounding difference (~0.8%). The formula is reliable for preliminary estimation across all sizes in the weight chart angle. Always finalise from the IS 808 table.
Standard MS angles come in 6-metre lengths. Multiply kg/m × 6 for weight per piece.
ISA 75×75×6 example: 6.84 × 6 = 41.04 kg per piece.
Pieces per MT: 1,000 ÷ 41.04 = ≈ 24 pieces per MT.
For 50×50×5: 3.77 × 6 = 22.62 kg/piece → ≈ 44 pieces per MT.
3mm to 16mm • Light Fabrication to Heavy Structural • Weight Chart Angle Implications
Leg size and thickness together determine both the weight per metre and the structural performance of an MS angle. This section maps common leg-size and thickness combinations from the weight chart angle to practical applications across Indian construction and fabrication.
The thinnest standard angle thicknesses. Used for decorative grilles, display stand frames, lightweight partitions, thin fence framing, exhibition structures, and non-load-bearing trims. ISA 25×25×3 at just 1.11 kg/m can be cut and welded by hand — but carries no meaningful structural load. Not recommended for any application with imposed loading without engineering validation.
The most commonly specified thicknesses in Indian fabrication. ISA 50×50×5 (3.77 kg/m) and ISA 75×75×6 (6.84 kg/m) are the two most widely stocked and referenced values in any weight chart angle in India. Used for gate frames, grilles, window frames, compound walls, shed purlins, equipment brackets, solar mounting, and light structural members.
Angles enter the structural performance range at 8mm and above. Required for transmission tower bracing, heavy gate main frames, mezzanine secondary framing, industrial staircase stringers, crane runway bracing, and conveyor support frames. ISA 75×75×8 at 9.00 kg/m and ISA 100×100×10 at 15.10 kg/m are the common structural references in this range.
Heavy-duty angles for transmission line tower legs, bridge bracing, crane gantry primary framing, industrial structure main members, and large-span roof trusses. ISA 150×150×12 at 27.30 kg/m and ISA 200×200×16 at 48.50 kg/m are in the same performance range as some I beam sections — they are always engineer-specified with MTC requirements and strict installation standards.
Going from ISA 75×75×5 (5.65 kg/m) to ISA 75×75×10 (11.00 kg/m) — a 95% weight increase for a 100% thickness increase. The slight shortfall occurs because the inner void area increases as thickness grows, so steel area increases sub-linearly. This is why the weight chart angle must be consulted rather than estimating by simple proportion — especially for accurate freight and BOQ calculations.
Construction • Industrial • Agriculture • Transmission • Solar
MS angles are the most versatile structural section in Indian construction. Their L-shaped profile makes them ideal for corners, bracing diagonals, frame members, and bracket supports — virtually any structural joint benefits from an angle section's ability to be bolted or welded in two planes simultaneously. Here is how sizes from the weight chart angle map to real-world applications.
Greenhouse framing, shade net structure support angles, cattle shed roof purlins, borewell pump platform frames, and agricultural gate main members. ISA 50×50×5 at 3.77 kg/m is the default choice for most farm gate and compound fence work across Chhattisgarh and Central India.
Ground-mounted and rooftop solar panel rafter angles (ISA 50×50×5), mounting purlin clips (ISA 40×40×5), sub-station structural angles (ISA 75×75×8 to 100×100×8). Hot-dip galvanised ISA sections are preferred for all outdoor solar installations due to corrosion exposure.
Electricity transmission towers use angle sections almost exclusively — from ISA 65×65×6 for bracing members up to ISA 200×200×25 for main tower leg sections. These are always engineered to IS 802 and require certified IS 2062 Grade E350 or E410 material with full MTC documentation.
ISA Equal vs ISA Unequal • Weight Chart Angle Comparison
Both equal and unequal angles appear in the weight chart angle tables — but they serve different purposes. Choosing the wrong type means inefficient use of material weight and cost. Here is a direct comparison.
| Parameter | Equal Angle (ISA A×A×t) | Unequal Angle (ISA A×B×t) | Better For |
|---|---|---|---|
| Leg symmetry | Both legs equal — centroid on line of symmetry | Long leg A > short leg B — asymmetric centroid | Equal — symmetric frames |
| Weight at same leg size | More weight — two equal-length legs | Less weight — shorter second leg reduces material | Unequal — weight saving |
| Use as a beam (bending one axis) | Less efficient — equal area each side of axis | ✔ Better — orient long leg in bending direction for higher section modulus | Unequal — beams & lintels |
| Connection & fit-up ease | ✔ Simpler — equal projection on both sides suits corner and symmetric joints | More complex — long and short leg must be correctly oriented at each joint | Equal — corners & frames |
| Use as back-to-back (battened) member | ✔ Standard — two equal angles back to back form a symmetric tee or cruciform | Possible but more complex — leg dimension mismatch at connections | Equal — built-up sections |
| Availability in India | ✔ Excellent — equal angles are stocked across all sizes at every steel distributor | Good for common sizes (100×75, 150×75) — less common sizes may require indent | Equal — immediate availability |
| Weight chart angle reference | Table in Section 03 — all ISA equal sizes | Table in Section 04 — all major ISA unequal sizes | Both covered in this guide |
Per-MT to Per-Metre Conversion • Specification Language • Common Errors
MS angles are sold by the tonne at mill and wholesale level — but estimated, cut, and invoiced by the metre or piece at the fabricator and project level. The weight chart angle is the conversion key. Without it, you cannot accurately evaluate a supplier's per-piece price against a per-MT quote.
Step-by-step example for ISA 75×75×6:
Step 1: Get per-MT price from supplier.
Example: ₹70,000 per MT
Step 2: Look up weight chart angle value.
ISA 75×75×6 = 6.84 kg/m
Step 3: Per-metre rate = (70,000 ÷ 1,000) × 6.84
= 70 × 6.84 = ₹478.80 per metre
Step 4: Per 6-metre piece = 478.80 × 6 = ₹2,872.80 per piece
This benchmark lets you immediately evaluate any supplier's per-piece quote for ISA 75×75×6 — and identify if a lower price is hiding an under-thickness specification.
1. Ordering by leg size only: "75×75 angle" without thickness means the supplier may deliver 5mm when you need 6mm — a 17% less steel by weight per metre at potentially the same per-piece price. Always specify: ISA 75×75×6, not just "75mm angle."
2. Confusing equal with unequal: ISA 100×75 is not the same as ISA 100×100 or ISA 75×75. They have different weights and different structural properties. The weight chart angle has separate tables for equal and unequal — always confirm which type is required for your application.
3. Not specifying material grade: For transmission towers and structural applications, IS 2062 Grade E350 or E410 may be specified. Standard stock is Grade E250 — always state grade on the purchase order.
Section: MS Equal Angle (ISA)
Designation: ISA 75×75×6 (IS 808:1989)
Length: 6 metres per piece
Standard: IS 808:1989 (Dimensions)
Material: IS 2062:2011 Grade E250
Mark: IS mark mandatory on section
MTC: Mill Test Certificate required with delivery
• Bureau of Indian Standards (BIS) — IS 808:1989 — Dimensions for Hot Rolled Steel Beam, Column, Channel and Angle Sections
• Bureau of Indian Standards (BIS) — IS 2062:2011 — Hot Rolled Medium and High Tensile Structural Steel
• Ministry of Steel, Government of India — Steel industry standards and market data
FAQ • For Fabricators, Contractors & Steel Traders
Vishwageeta Ispat is Raipur's trusted iron and steel stockist — supplying TMT bars, MS angles (IS 808) in all equal and unequal ISA sizes, ISMB I beams, ISMC channels, MS round pipes (IS 1239), square MS pipes (IS 4923), GI pipes, MS sheets, chequered plates, and all structural steel products. This weight chart angle reference is published as a free technical resource for fabricators, contractors, structural engineers, and procurement teams across Chhattisgarh and Central India.
Need current rates on MS angles or any other structural section? Our team provides mill-linked, competitive pricing on all IS 808 sections. Call, WhatsApp, or fill the enquiry form — we respond the same working day.