Technical resource · Dimensional reference

Steel Beam Size Chart

Steel Beam Size Chart: Use the reference to identify or compare section designations, dimensions or mass, then verify the selected designation against the current governing standard and project documents before ordering; this page is not a structural-design substitute.

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Shape system: American, European, Japanese, British
Designation: System + series + size
Material grade: A separate layer entirely
Reference edition: Cite it, or the value is unverifiable

Working technical tool

Steel Beam Designation Lookup and RFQ Transfer

Enter the designation as it appears on your drawing. The lookup resolves the shape system and the nominal size, flags a designation that cannot be resolved to one section, and keeps the material grade in a separate layer. It identifies and cross-checks — it does not size members.

Beam inputs

Resolution is derived from what you enter. Nothing is looked up.

Shape systemCross-checked against the designation you type. A mismatch is flagged, not silently resolved.

Section designationInclude the system prefix and the series. A bare number, a generic 'beam', or 'HE 200' without the series letter will not resolve.

Property you needMaterial grade / standardGeometry and material are separate layers — the chart sets geometry only.Ordered lengthRequired only where an order mass is needed. Include the unit.Piece countDestination / delivery locationInspection document levelSet by the project — not implied by the designation.

Lookup output

Nothing entered yet. Start with the shape system and the designation — American, European, Japanese and British series are different sections even where nominal dimensions coincide.

Send this line item for technical review

The line item built above is attached exactly as you entered it — designation, resolved shape system, size, grade, quantity basis, destination and required documents. Unresolved items travel with it as open questions rather than being resolved on your behalf.

Enter beam inputs above and they will be attached automatically.

Method, formula and data conditions

How the lookup works, and what it deliberately will not return

This page identifies and cross-checks beam designations. It tabulates no dimensions, masses or section properties of its own, because those values belong to the governing standard and change with its edition. What follows is the method, the unit system, and the boundary of what the output means.

Resolution method

1Identify the shape system firstAmerican, European, Japanese and British series are separate families with different proportions. The system is resolved from the prefix, and the designation is only meaningful inside it.
2Reconcile against a separately stated systemIf a shape system is also selected in the form, it is cross-checked against the prefix you typed. A disagreement is reported as a conflict, never resolved silently in favour of one.
3Reject generic and incomplete names'Beam', 'I beam' and a bare number match several systems. 'HE 200' without the series letter matches two sections at the same depth. Both are blocked rather than approximated.
4Keep geometry and material as separate layersThe designation fixes geometry only. The material grade and its standard are captured as independent fields and never inferred from the section.
5Report what remains unresolvedA missing grade, document level or destination is listed as an open item and travels into the RFQ as a question.

Formula and unit conditions

Order mass = unit mass × ordered length × piece count. The unit mass is a tabulated value in the governing dimensional standard — it is not held on this page and is not supplied here, because reproducing it without its edition produces a figure that looks authoritative and cannot be checked at goods-in.

Unit system: metric throughout, unless a project states another basis explicitly. SI and inch-pound values are never mixed inside one calculation.
Every numeric field requires its unit to be written in. The lookup does not assume one and does not convert silently.
Nominal dimensions, masses and section properties are properties of the standard's edition, not of the shape name.

Source hierarchy and applicability

1. Project documents governThe drawing, the section schedule and the governing code decide which designation applies. This page never overrides them.
2. The dimensional standard defines the valuesNominal dimensions and masses for rolled structural sections are tabulated in the dimensional standard. Its edition is what makes a figure verifiable.
3. The material standard defines the gradeComposition, strength and toughness sit under a separate material standard. The beam designation says nothing about them.
4. This page identifies and cross-checksIt resolves a designation to a shape system and size, flags ambiguity, and assembles the RFQ line item. That is the whole of its authority.

Limitations

The lookup returns no dimension, mass, section property, load capacity, stock status, price, lead time, origin or certificate.
A definitive result is blocked when the shape system or the designation is ambiguous — the nearest match is never substituted.
Nothing here is a structural check. Adequacy for the design is determined by your engineer against the governing code.
The cited standard establishes scope and method. It does not establish availability, origin or project approval for any order.

Procurement-grade worked examples

What the lookup returns, and what changes downstream

Each example shows the input, the method applied, the result, how to read it, and the decision it changes. None uses a real client, project or order — the entries are illustrative designations of the kind that appear on drawings.

Resolves cleanly

Input: W 12×40 · grade noted · EN 10204 3.1 · destination stated
Method applied: American W prefix parsed from the designation; size token 12×40 extracted; no mismatch against the selected shape system.
Result: Beam identified — American W series, designation W 12×40.
Interpretation: The designation resolves to one section, and the material layer is stated rather than inferred. This is the shape an RFQ line item should arrive in.
Decision impact: Proceed: transfer the line item into the enquiry, and cite the governing dimensional standard's edition on the schedule.
Verification step: Confirm against the drawing that the W series is correct and the drawing does not specify a European or Japanese equivalent.

Ambiguous series

Input: HE 200 · no series letter · grade not stated
Method applied: The 'HE nnn' form without the series letter cannot be resolved — it matches two European wide-flange sections at the same nominal depth, and those are different sections.
Result: Verify first — series unresolved, grade missing.
Interpretation: The lookup returns the ambiguity rather than guessing. The two sections differ in flange and web thickness and therefore in mass.
Decision impact: Hold the enquiry until the drawing author states the series letter. Quoting a guess narrows the field to the wrong section.
Verification step: Check the section schedule for the series letter, or ask the engineer which of the two was intended.

Blocked — system conflict

Input: IPE 300 · shape system selected as British UB/UC
Method applied: The designation prefix IPE resolves to the European series, but the selected system is British. The two cannot both be right.
Result: Blocked — conflicting shape systems.
Interpretation: This is the error that produces a wrong section most quietly, because both inputs look plausible in isolation and the mismatch is only visible when they are compared.
Decision impact: Return to the drawing. Confirm whether the schedule is European or British before any value is transferred.
Verification step: Confirm the governing system from the drawing's notes or the project specification, not from a previous order.

Worked example outcomes with buyer implication, applicability and the RFQ action each produces
Example	Buyer implication	Applicability / limitation	Resulting RFQ action
W 12×40, system stated	The line item is comparable across quotations because the same fields are stated for each.	Applies to the American W series. A similar depth in another system is a different section.	Transfer designation, grade, quantity basis, destination and document level unchanged.
HE 200 without a series letter	Quoting now would price whichever section the supplier assumed — a substitution the buyer did not make.	Inherent ambiguity in the 'HE nnn' form; not a data gap this page can close.	Hold. Return to the drawing for the series letter, then re-enter.
IPE 300 with British system selected	Two plausible inputs that cannot both be right; the mismatch is invisible unless compared.	The systems are different families with different proportions and masses.	Blocked. Confirm the governing system before assembling the line item.

Standards and tolerance context

How standard, grade and tolerance change what the chart means

A dimension read from a reference is only half the specification. The dimensional standard fixes geometry; the material standard fixes the grade; the tolerance clause fixes what deviation is acceptable at goods-in. Each is a separate layer with its own verification.

Standards, tolerance and assumption context with source, conditions and the RFQ field each produces
Layer	What it fixes	Source and condition	Buyer implication → RFQ field
Shape system and designation	Which geometric beam the name refers to, and the proportions its series carries.	The shape system's own designation convention, together with the dimensional standard that tabulates it.	The system is part of the name — never infer it from depth. → Shape system + designation fields
Nominal dimensions	Depth, flange width, flange and web thickness for the designation.	The current edition of the governing dimensional standard, in metric units.	Cite the edition on the schedule. → Designation + reference edition fields
Unit mass	The mass basis used for estimating, freight and quotation comparison.	Tabulated in the same dimensional standard, per designation. Theoretical and actual mass differ.	State which mass basis the quotation uses. → Quantity / mass basis field
Section properties	Second moment of area, section modulus and radius of gyration, published per designation.	Tabulated in the dimensional standard or the section tables referenced by the project.	Published properties are not a design check. → Design responsibility field
Dimensional tolerances	Permitted deviation on each dimension, which the connection detail actually relies on.	The tolerance clauses of the governing dimensional standard, or a project-specified class.	Never implied by the designation. → Tolerance class field
Material grade and standard	Composition, strength and toughness — the material the beam is made from.	A separate material standard, with the project's supplementary requirements.	The size chart says nothing about grade. → Grade + material standard fields
Coating or finish	Surface protection where the service environment requires it.	A coating or paint specification, separate from both dimensional and material standards.	Sits outside the size chart entirely. → Coating system field
Inspection and test documents	What evidence the delivery must carry and who validates it.	The EN 10204 level named by the project, not implied by grade or shape.	Name the level in the enquiry. → Documents field

Evidence note. This page tabulates no dimension, mass or property value for any designation. Those values belong to the governing standard at a stated edition and are verified against it and against the certificate for the material supplied. Where a figure matters to your estimate or your design, read it from the standard edition your project cites.

steel size charts The approved cross-product page, so the same dimensional theme can be compared without losing scope.en 10025 structural steel supplier Validate the governing specification family rather than relying on a shape name alone.ss400 structural steel supplier A related grade route where the strength class, rather than the geometry, drives acceptance.

Applicability boundary: each route above is a decision aid for the layer it covers — the dimensional theme, the section standard, or the material grade. None substitutes for your project's governing edition, and none implies availability for a specific designation or quantity.

Verification and misuse controls

Where this chart gets misused, and how it is caught

A beam size chart is one of the most frequently misapplied documents in procurement, because it is easy to read and easy to read wrongly. These are the errors we see, what each one costs, and the control that catches it.

Requested evidence, what it verifies, who supplies it, when it is required and what remains quotation-dependent
Requested evidence	What it verifies	Who supplies / verifies	When required	Quotation / project dependency
Full designation incl. shape system	That the beam ordered matches the section on the drawing, not a similar depth in another system.	Buyer, from the drawing or section schedule.	Before the enquiry is issued.	The supplier cannot supply the system — only the buyer's documents can.
Cited reference edition	That the nominal values being used come from a known edition and can be checked.	Buyer / project specification.	At the point values are transferred to the RFQ.	Omitting the edition makes a dimension or mass figure unverifiable at goods-in.
Tolerance requirement	What deviation is acceptable on each dimension and on mass.	The governing dimensional standard, or the project's specified class.	Stated in the enquiry.	Not implied by the designation. Left open, it becomes a dispute at goods-in.
Inspection certificate (EN 10204 level)	That the delivered material meets the project's evidence requirement at the level the contract names.	Manufacturer, or an independent body at the higher levels.	At the project's inspection hold point.	The level is set by the contract — this page cannot supply or imply a certificate.
Material identification marks	That the delivered beam matches the grade and shape system ordered.	Supplier, against the governing material and dimensional standards.	At goods-in, before the beam enters fabrication.	Depends entirely on the designation being unambiguous in the order.
Dimensional verification on receipt	That the delivered beam matches the designated geometry within tolerance.	Buyer's goods-in inspection, using the project's method.	On receipt, before fabrication.	The method and sampling are the buyer's; this page sets no inspection regime.

Steel Beam Size Chart dimension verification using caliper and rule used for procurement verification — Dimensions verified against the designation before the beam enters fabrication. A designation that never becomes an RFQ field is a designation that will not be checked.

Common input errors and their controls

1Depth taken as the designationA depth figure matches several sections across systems. Control: the lookup requires the system and series, not just a size.
2Series letter omitted'HE 200' matches two different sections at one depth. Control: blocked and reported, because the difference is not recoverable later.
3Shape system inferred from a previous orderThe same project can mix systems across packages. Control: the system is a required field and is cross-checked against the designation.
4Published properties read as capacitySection properties are not a design check. Control: the checklist states the boundary at every result.
5Mass taken from an unversioned tableValues are properties of a standard's edition. Control: the line item requires a cited edition before it is transferable.

Engineering review is required whenever the output is used for anything beyond identification and comparison — member sizing, connection design, fatigue or seismic assessment, or any check against the governing code.

Product decision handoff

Where the result goes next

A resolved designation is not the end of the decision. Depending on what is still open — the section family, or the application that sets the service conditions — one of these related pages carries the next step.

The section family is still open

Where the member role or the connection geometry is undecided, compare the section family before the designation is fixed. A resolved size without a resolved family is not yet a specification.

steel t section supplier

The application sets the service conditions

Where marine exposure, fatigue-sensitive details and a governing code with its own material clauses apply, the application changes the toughness and traceability requirements — not the beam geometry.

offshore structural steel supplier

Or go straight to the RFQ

If the designation, grade and destination are already resolved, the line item above is ready to transfer. Unresolved items travel with it as open questions.

Request a Quote

A designation read from the reference beside the profile it identifies. The image implies no supply capability — availability remains quotation-dependent throughout.

Related related tools and pages

Grouped by the next task, not listed as a directory

Each group below answers a different question that follows from reading a beam size chart. Pick the group that matches what is still unresolved.

Resolve the section standard

The chart identifies a designation; the standard explains the family it belongs to and the tolerances that apply.

Resolve the material

Geometry and material are separate layers. Where the grade is the open question, this page carries that decision.

ss400 structural steel supplier A related grade route where the strength class drives acceptance.

Compare the section family

Where the geometry itself is still undecided, compare the family before the designation is fixed.

GCC product × country routes

Destination changes the documents and the delivery, not the beam

A resolved designation travels the same way wherever it ships. What changes by destination is the documentation set, the delivery location, the customs route and the delivery term the quotation must reflect.

United Arab Emirates

Domestic delivery and designation confirmation

Confirm which shape system your drawing cites, then plan delivery to site or fabricator with the document set the project accepts.

structural steel supplier UAE

Saudi Arabia

EPC documentation and project quantities

Saudi EPC work aligns the designation and its dimensional standard to the project hold points before shipment is planned.

structural steel supplier Saudi Arabia

Qatar

Technical submittal approval

Qatar procurement usually requires technical submittal approval first, so the designation and document set are resolved up front.

structural steel supplier Qatar

Kuwait

Contractor procurement hand-off

Kuwait contractor supply links the section schedule to fabrication needs, with shipment agreed against destination and window.

structural steel supplier Kuwait

Bahrain

Industrial supply and re-export

Bahrain industrial supply depends on accurate section schedules; designation and dimensional reference are coordinated to requirement.

structural steel supplier Bahrain

Oman

Port-oriented industrial projects

Oman projects are typically supplied through port destinations, harmonising the section schedule with the project requirement.

structural steel supplier Oman

Steel Beam Size Chart estimator worksheet transferring verified section data used for procurement verification — Verified section data transferred into an estimator's worksheet. The worksheet is where an unverified designation becomes an order — which is why the reference edition belongs on it.

What each destination route requires you to state

Delivery locationPort of discharge, project site or free-zone address changes the delivery leg, the documents at each hand-over and who bears the cost between them.
Documentation setCustoms entry requires documents that vary by destination and commercial term. Certificates, packing lists and marking requirements are agreed in the enquiry.
Delivery termThe Incoterm decides where responsibility transfers and which charges sit inside the quoted price.
Mass basisState whether the quotation is built on theoretical or actual mass, so quotations can be compared line for line.

These routes describe destination planning inputs. They do not assert that any market is served by a local branch, that stock is held anywhere, or that any destination is currently reachable — availability is confirmed at quotation.

Expert insight

How a size chart becomes an unverified specification

A beam chart is useful precisely because it is easy to read. That is also how it becomes a purchase specification nobody verified: a depth is copied from a table, the shape system is dropped because it looked redundant, and the supplier is left to choose a section.

Verify-first checklist

Work through these six items before a value from any beam chart reaches an enquiry. Each is something the reference cannot answer for you.

1Confirm the shape system, not just the depthAmerican, European, Japanese and British series all contain beams at similar depths and they are different sections. The system is part of the designation.
2Cite the standard edition you read the value fromNominal dimensions, masses and section properties are properties of an edition. A figure without its edition cannot be checked at goods-in.
3Separate geometry from the material gradeThe chart fixes geometry only. Composition, strength and toughness sit under a separate material standard and a separate RFQ field.
4State the mass basis explicitlyTheoretical and actual mass differ. Say which the quotation is built on, or two quotations for the same beam cannot be compared.
5Confirm the tolerance basisPermitted deviation comes from the dimensional standard's tolerance clauses or a project class. It is never implied by the designation.
6Keep design approval where it belongsPublished section properties are not a capacity check. Adequacy is determined by your engineer against the governing code and the actual load cases.

Buyer implication. Treat chart output as a verified designation aid, not structural design approval. The RFQ must retain the governing material standard and the project-specific tolerances, or the designation arrives without the requirement it was meant to serve.

Source record

Primary source: BSI — BS EN 10365:2026, Hot rolled steel channels, I and H sections. Dimensions and masses
Direct source URL: knowledge.bsigroup.com — BS EN 10365:2026
Method: Use the current dimensional standard to identify the section designation and nominal dimensions and mass, then cross-check the project drawing, material grade and standard, and tolerance requirements before transferring values into the RFQ.
Information date: 2026-09-24
Scope: Nominal hot-rolled structural-section designations, dimensions and masses covered by the cited dimensional standard.

Limitations

The cited source establishes scope and process context. It does not prove Noor Deira Steel inventory, origin, price, lead time, certification or project approval.
Project drawings, the governing code, the purchaser's specification and the current supplier quotation remain controlling for the actual order.
This is a source-backed technical decision aid, not a named-person endorsement, and not a substitute for the standard itself.

Evidence-led buyer advantages

What we do about the ways a beam chart gets misread

Each item starts from a real concern that follows from using a dimensional reference, states the practice that addresses it, and ends at the outcome it produces. None rests on a claim about scale, stock or price that this page cannot substantiate.

Buyer concern: The designation arrives as a depth alone
What we do: We return the ambiguity instead of choosing a section — the lookup blocks where the shape system is missing or the entry is a generic beam name.
Procurement outcome: The beam quoted is the one your drawing specifies, not the one we found nearest to it.

Buyer concern: Shape systems get conflated
What we do: The system is a required field and is cross-checked against the designation prefix. A mismatch is reported, never silently resolved.
Procurement outcome: A European designation never gets ordered against an American or British assumption.

Buyer concern: A value is used without its reference edition
What we do: We require the reference edition to be stated before a value is treated as transferable, and we hold no dimension or mass values of our own.
Procurement outcome: Every figure on the enquiry can be checked against the edition it came from.

Buyer concern: Published properties read as capacity
What we do: The boundary is stated at every result: the lookup identifies and compares; it does not size members or verify adequacy.
Procurement outcome: Design responsibility stays where your project placed it, and the RFQ implies no approval we cannot give.

Buyer concern: Requirements get lost between chart and order
What we do: The line item carries every field you entered, in your own wording, with unresolved items flagged as questions.
Procurement outcome: What you specified is what is quoted and what is ordered. Nothing is normalised silently.

Buyer concern: Commercial terms are assumed
What we do: We build the quotation on the stated destination, Incoterm and mass basis, and name the inputs still missing rather than filling them in.
Procurement outcome: The delivered cost reflects the delivery you actually asked for, on the mass basis you chose.

Advantages describe procurement practice. They make no claim about plant capacity, stocking position, delivered tonnage, pricing position or certification status.

From enquiry to delivery

Who owns what, at every stage

A beam designation moves through defined stages on its way to an order. Each stage below names the concern it resolves, who owns it, what has to be supplied, what comes out of it, and the risk if it is skipped.

Workflow stages with buyer concern, owner, required input, output, risk and next action
Stage	Buyer concern	Owner	Required input	Evidence / output	Risk if skipped	Next action
Designation resolution	A depth without a shape system does not identify a beam.	Estimator / engineer	Drawing or section schedule with the full designation.	Resolved shape system and nominal size.	A different beam is quoted and ordered.	Run the Designation Lookup.
Reference verification	A value without its edition cannot be checked.	Estimator	The dimensional standard edition the project cites.	Dimensions and mass with a citable source.	A value is disputed at goods-in.	Cite the edition on the schedule.
Material layer	Geometry says nothing about the grade.	Engineer / project	Governing material standard and grade.	Grade and standard stated separately.	The supplier infers a grade.	Add the grade to the enquiry.
Enquiry issued	Quotations cannot be compared.	Buyer / procurement	Designation, grade, quantity, mass basis, destination, documents.	A complete line item.	Suppliers quote on different assumptions.	Send the line item.
Technical review	Project acceptance is not the supplier's to give.	Noor Deira Steel — commercial department	The enquiry and any project specification.	Open items identified and returned to you.	Unresolved items become assumptions.	Close the open items.
Order and production	The beam must match the approved designation.	Supplier / mill	Confirmed order and delivery schedule.	Production against the stated route.	A requirement discovered too late to change.	Confirm documents before release.
Goods-in verification	The delivered beam must match the designation.	Buyer / QA	The designation, tolerance basis and inspection plan.	Dimensional and identification check.	A similar section accepted as the designated one.	Verify against the governing standard.

Buyer FAQ

Questions that come up after the chart is read

These are the questions estimators, engineers and buyers raise once a designation has been taken from a beam chart — not what these series are, but what still has to be pinned down before the section can be ordered.

Our drawing says 'W 12×40'. Is that the same as an IPE or HEB section of similar depth?

No. The American W series, the European IPE/HEA/HEB series and the Japanese H series are different shape systems with different flange and web proportions, different corner details and different mass for a given depth. A W 12×40 is identified by its American designation and must be ordered as that. If a drawing mixes systems, that is a question for the drawing author before the enquiry is issued, not a substitution for the supplier to make.

The chart gives a mass per metre. Can I use it as the ordered tonnage?

Use it for estimating, not as the ordered quantity. Tabulated mass is nominal or theoretical; purchase quantity and shipping mass must be reconciled against the exact section standard, the ordered lengths, permitted tolerances and any fabrication additions. State which mass basis your quotation is built on, or two quotations for the same beam cannot be compared line for line.

A schedule lists 'HE 200' with no series letter. What do you need?

The series letter. At nominal depth 200 the European wide-flange series differ in flange and web thickness, so HE 200 A and HE 200 B are different sections with different mass — and the difference is not recoverable later. Confirm the letter against the drawing or the project's section schedule before the value goes into the enquiry.

Does the beam designation tell you what grade I need?

No, and this is the most common conflation. A designation such as W 12×40 or IPE 300 fixes geometry only. The material grade and its standard are a separate layer, and the inspection document level is a third. All three belong in the enquiry, because the grade cannot be inferred from a section name.

Which edition of the dimensional standard should the schedule cite?

The edition your project's governing documents reference. Nominal dimensions and masses for rolled structural sections are tabulated in the current edition of the relevant dimensional standard, and values can change between editions. Citing the edition on the schedule is what makes the figure verifiable — a value from an unversioned table cannot be checked at goods-in.

Can this chart confirm my beam is adequate for the design?

No. This is a dimensional reference and a designation aid — it is not a structural check and not project approval. Capacity depends on load cases, effective lengths, restraint conditions and the governing code, none of which a size chart holds. Structural adequacy is determined by your engineer. Our role is to make sure the beam the quotation is built on is the beam your drawing specifies.

Assisted RFQ

Need a verified structural steel specification?

Send the grade, size, quantity and destination for technical RFQ support. If the designation has resolved above, the line item is attached automatically; anything still open travels with it as a question.

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Monday – Saturday: 8.00 AM – 6.00 PMSunday: Closed

Unresolved verification items travel with this RFQ. If the shape system, grade, reference edition or delivery term is still open, it is listed as a question rather than assumed.

Formula and method

What is computed here, and what is deliberately not

The lookup performs identification logic, not arithmetic. It returns no mass, no section property and no capacity figure — because each of those depends on a value that belongs to a standard edition this page does not carry.

Computation method, inputs, unit conditions and the RFQ field each produces
Computation	Method and unit condition	Why it is not performed here	Buyer action → RFQ field
Shape system and size resolution	Deterministic parse of the designation prefix into a shape system, with the numeric size token extracted separately.	Performed here — this is identification, not measurement.	Enter the full designation. → Designation field
Unit mass	Unit mass for a designation is tabulated in the dimensional standard; order mass = unit mass × ordered length × piece count.	The lookup carries no unit-mass values, because they are properties of a standard edition that changes.	Read the value from your cited edition. → Quantity / mass basis field
Section properties	Second moment of area, section modulus and radius of gyration are tabulated per designation in the standard.	Not returned here — and not a substitute for a structural check even when read correctly.	Take them from the standard, and have the design verified. → Design responsibility field
Member capacity	Requires load cases, effective lengths, restraint conditions, buckling and the governing code, none of which this page holds.	Outside the scope of a dimensional reference entirely.	Belongs to your engineer, not to the supplier. → Not an RFQ field
Unit conversion	Metric throughout. Any SI to inch-pound conversion requires an explicit stated step and is never applied silently.	Silent conversion is how the wrong beam gets ordered.	State the units of every value you enter. → Units stated in each field

Why the distinction matters

Identification is safe to automateParsing a designation and cross-checking a shape system is deterministic. The same input always yields the same answer, and the answer is verifiable.
Tabulated values are notA dimension, mass or section property is a property of a standard edition. Reproducing it without its edition produces a figure that looks authoritative and cannot be checked.
Arithmetic hides assumptionsA derived mass or capacity figure carries the assumptions used to produce it. Presenting the result without them is what turns a reference into a wrong specification.
The boundary is stated, not impliedEvery result on this page says what it does and does not establish, so the output cannot be mistaken for an approval.

Worked examples

Estimator-grade examples with the arithmetic shown

These examples take a resolved designation through to the estimate, showing where each figure comes from. The unit masses used below are illustrative placeholders for the method — not values — and must be replaced with the figure from your cited edition.

Order mass from a resolved designation

InputW 12×40 · grade noted · 12 m ordered length · 40 pieces · EN 10204 3.1
Step 1 — resolve the designationAmerican W prefix parsed; size token 12×40 extracted. No mismatch against the stated shape system.
Step 2 — read unit massTake the unit mass for W 12×40 from the dimensional standard edition your project cites. The value is not held on this page and is not supplied here.
Step 3 — compute order massOrder mass = unit mass × 12 m × 40 pieces. Substitute your edition's unit mass, and record the unit you substituted.
Step 4 — interpretationThe figure is a nominal or theoretical mass. It is suitable for estimating and freight planning; it is not the invoiced quantity.

Confirm the drawing specifies the American W series and not a European or Japanese equivalent of similar depth.

Comparing two quotations for the same beam

InputHEB 200 · grade noted as S355 · 9 t stated on both enquiries
Step 1 — check the mass basisAsk both suppliers whether 9 t is theoretical or actual mass. If the bases differ, the quantities are not the same tonnage.
Step 2 — check the designation resolvesHEB 200 resolves cleanly to the European series. Confirm the drawing does not specify a different series at the same nominal depth.
Step 3 — check the material layerConfirm the grade and its material standard are stated, not inferred from the designation.
Step 4 — interpretationTwo quotations built on different mass bases or different grades cannot be compared line for line, regardless of the prices.

Reconcile the mass basis and the governing material standard before any price comparison is made.

Other structural steel routes this reference feeds

A beam size chart supports a purchasing decision rather than replacing it. These are the related pages where the section decision continues, grouped by what the buyer is still resolving.

Related related pages with the decision each serves and the boundary of its applicability
Related route	Decision it serves	Buyer implication	Applicability boundary
steel t section supplier	Choosing the section family where geometry, not the grade, is the open question.	Lets a directly relevant family be compared before the designation is fixed.	Covers the section family only — it does not set the material grade or the dimensional tolerances.
ss400 structural steel supplier	Resolving the material layer where the strength class drives acceptance.	Compares a related grade route rather than inferring a grade from the section name.	Covers the material grade only — it says nothing about section geometry or mass.
en 10025 structural steel supplier	Validating the governing specification family behind the designation.	Confirms the specification family rather than relying on a shape name alone.	Covers the standard family — availability and project approval are not established by it.
structural steel types	Keeping the section comparison within Structural Steel.	Provides a safe route to a broader or sibling specification decision.	A taxonomy route — it does not state requirements for any individual section.
steel size charts	Comparing the same dimensional theme across product forms.	Connects this member page to its approved cross-product reference without losing scope.	A cross-product reference hub — values still belong to the governing edition of each standard.

Downloadable reference

Taking the reference offline

Estimators usually need these values in a document rather than on a page. This section explains what to carry off this page, what to carry from elsewhere, and how the two stay reconciled.

What to take from this page and what must come from the governing standard, with the reconciliation step
Item	Where it comes from	Verification / source requirement	Resulting RFQ field
Resolved designation	This page — the lookup output.	Confirm the shape system against the drawing; the page resolves the name, not the design intent.	→ Designation field
Nominal dimensions	The dimensional standard edition your project cites.	Read from the cited edition. This page holds no dimension values.	→ Dimensions with units
Unit mass	The same dimensional standard edition.	Record the unit you substituted alongside the value.	→ Quantity / mass basis field
Section properties	The dimensional standard or the section tables the project references.	Published properties are not a capacity check — the design still needs verifying.	→ Design responsibility field
Tolerance basis	The standard's tolerance clauses, or the project's specified class.	Confirm whether the project names a class or defaults to the standard.	→ Tolerance field
Material grade and standard	The material standard, from the project specification.	Never inferred from the beam designation.	→ Grade + material standard fields
Copyable line item	This page — the scope summary.	Carries every unresolved item as a question rather than an assumption.	→ The RFQ itself

No file is served from this page

A downloadable spreadsheet would reproduce dimension, mass and property values without their standard edition, and would be copied into estimates long after the edition changed. Instead, the lookup produces a copyable line item — carried in your own wording, with every unresolved item visible — and the values themselves are read from the edition your project actually cites.

Copy the line item into your estimate or enquiry document.
Substitute dimension and mass values from your cited edition, recording units.
Keep the reference edition on the schedule so the figure can be checked at goods-in.
Re-check the line item whenever the cited edition is superseded.

Go to the lookup