1. What Are MTO and BOM in Structural Steel Projects?

In structural steel engineering and construction, accurate material planning is essential for controlling project costs, minimizing fabrication waste, and ensuring that steel components arrive at the construction site according to schedule.

Two important documents used throughout this process are the Material Take-Off (MTO) and the Bill of Materials (BOM).

Although these terms are sometimes used interchangeably, they serve different purposes within engineering, procurement, fabrication, and construction workflows.

A structural steel MTO identifies the quantities of steel materials required for a project based on engineering drawings, structural models, and technical specifications.

A structural steel BOM provides a structured list of materials, individual parts, and components required to manufacture or assemble specific structural elements.

Understanding the relationship between these documents helps engineers, fabricators, EPC contractors, and steel suppliers avoid material shortages, specification errors, and unnecessary procurement costs.

At Xi'an Dongmeng Group Co., Ltd., structural steel procurement support includes reviewing project material requirements, section specifications, steel grades, quantities, and applicable manufacturing standards.

This approach helps international buyers translate engineering material lists into practical steel purchasing requirements.

2. Structural Steel MTO vs BOM: Key Differences

The main difference between an MTO and a BOM is their level of detail and intended application.

An MTO focuses primarily on the materials and quantities required by the project.

A fabrication BOM identifies the components needed to manufacture individual assemblies.

MTO vs BOM Comparison

Important: Actual terminology varies between organizations. Some companies use BOM as a general procurement material list, while others reserve the term for fabrication-level component schedules.

For effective project management, the document purpose, scope, and revision status should always be defined.

MTO, BOM, and BOQ: Are They the Same?

Another commonly used document is the Bill of Quantities (BOQ).

These three documents should not automatically be considered equivalent.

MTO: Identifies material quantities required by the engineering design.

BOM: Identifies the components and parts required for fabrication or assembly.

BOQ: Organizes measurable work items and quantities for tendering, pricing, or contractual valuation.

For example, a BOQ may include structural steel supply and erection measured in tonnes, while the MTO identifies the individual beam sections and quantities needed to complete that work.

A fabrication BOM then identifies the plates, beams, bolts, and other components belonging to each fabricated steel assembly.

3. What Information Should a Structural Steel MTO Include?

A professional structural steel MTO must contain sufficient technical information to support accurate purchasing and material verification.

Simply listing steel weight is not enough.

A complete material takeoff should identify the correct steel section, material grade, quantity, dimensional standard, and relevant technical requirements.

Recommended Structural Steel MTO Fields

Additional project-specific fields may include:

Structural member identification

Steel grade and quality designation

Manufacturing and dimensional standards

Heat-treatment or delivery condition

Cut-to-length requirements

Bolt-hole and drilling requirements

Fabrication or installation location

Material traceability requirements

Surface preparation and coating specifications

Inspection and testing requirements

Supplier reference

Required delivery date

Material reservation status

For large EPC projects, the MTO should also identify project areas, buildings, modules, or construction phases.

This allows procurement teams to release materials according to actual construction priorities.

4. How to Prepare a Structural Steel MTO: Step-by-Step

Preparing an accurate structural steel material takeoff requires a systematic engineering workflow.

Step 1: Collect Approved Engineering Documents

The starting point is the latest applicable engineering documentation.

Typical documents include:

General arrangement drawings

Structural framing plans

Elevation drawings

Structural connection details

Steel member schedules

Design specifications

Approved structural models

Project material specifications

For procurement release, confirm that the documents have an authorized status suitable for purchasing, such as an approved-for-construction issue where required by the project.

Preliminary or tender-stage drawings may be used for estimates, but their quantities should not automatically be treated as final procurement requirements.

Every extracted material item should remain traceable to its source document and revision.

Step 2: Classify Structural Steel Materials

Structural steel should be divided into clearly defined categories.

Primary Structural Members

These commonly include:

H beams and wide flange sections

I beams and universal beams

Universal columns

Built-up welded columns

Heavy structural sections

Structural hollow sections

Primary structural members carry the principal loads transferred through the structural system.

Secondary Structural Members

Typical materials include:

Channel sections

Equal and unequal angles

C purlins

Z purlins

Secondary beams

Bracing members

Support frames

Connection Materials

These may include:

Base plates

Gusset plates

End plates

Stiffener plates

Splice plates

Connection angles

Structural bolts

Nuts and washers

Anchor rods and assemblies

Connection materials should not be omitted merely because their individual weights are relatively small.

They may represent a significant number of fabricated parts and purchasing transactions.

Step 3: Identify Steel Grades and Section Standards

Each steel section must be associated with the correct material specification.

Common international structural steel standards include:

A critical distinction must be made between material standards and dimensional standards.

For example:

ASTM A992 specifies material requirements for structural steel shapes.

ASTM A6/A6M establishes general requirements applicable to rolled structural steel products, including relevant dimensions and tolerances.

Similarly, EN 10025-2 covers material delivery conditions for specified hot-rolled structural steels, whereas EN 10365 covers dimensions and masses for certain hot-rolled structural sections.

Can Different Steel Grades Be Substituted?

Steel grades should not be substituted based only on similar nominal yield strengths.

For example, ASTM A572 Grade 50, ASTM A992, S355JR, and Q355B may have comparable strength levels in some applications.

However, they are not automatically interchangeable.

Differences may include:

Chemical composition

Thickness-dependent mechanical properties

Impact toughness requirements

Weldability

Product form restrictions

Dimensional requirements

Material certification

Applicable structural design codes

Any proposed substitution must be reviewed and approved by the responsible engineer or other authorized project representative.

5. How to Calculate Structural Steel Weight for an MTO

Weight calculation is one of the most important steps in structural steel material takeoff.

Incorrect weights can affect procurement quantities, transportation planning, project estimates, and material inventory.

The most reliable approach depends on the type of steel product being calculated.

5.1 Structural Steel Weight Calculation by Section Mass

For standard rolled steel profiles, use the published nominal mass per unit length from the relevant recognized section table.

The basic formula is:

Total Mass (kg) = Unit Mass (kg/m) × Length (m) × Quantity

Where:

Unit Mass = Nominal weight per metre

Length = Individual member length

Quantity = Number of identical members

Example: W12×26 Structural Steel Beam

Assume a project requires:

Calculation:

Total Length:

12 × 6.0 = 72 m

Total Mass:

38.692 × 72 = 2,785.82 kg

Using the unrounded conversion factor gives approximately 2,785.84 kg.

The theoretical steel mass is therefore approximately:

2.786 metric tonnes

This value represents the nominal calculated mass, not necessarily the final commercial invoice weight.

Permissible mass variations and the agreed method of determining delivery weight must be considered.

5.2 Calculating Steel Weight from Cross-Sectional Area

Where the nominal cross-sectional area is known:

Mass per Metre (kg/m) = Cross-Sectional Area (mm²) × 0.00785

This formula assumes a nominal steel density of:

7,850 kg/m³

For example, a steel member with a nominal cross-sectional area of 5,000 mm² has a calculated mass of:

5,000 × 0.00785 = 39.25 kg/m

For standard rolled sections, published section-table masses are generally preferable to simplified geometric calculations.

The published values account for the section geometry, including features such as flange transitions and root radii.

5.3 Structural Steel Plate Weight Calculation

Steel plates are commonly used for:

Base plates

Connection plates

Gusset plates

Stiffeners

End plates

Splice plates

For a rectangular plate:

Plate Mass (kg) = Length (m) × Width (m) × Thickness (m) × 7,850

Example: Structural Base Plate

Plate dimensions:

300 × 300 × 20 mm

Quantity:

8 pieces

Mass per plate:

0.30 × 0.30 × 0.020 × 7,850

= 14.13 kg

Total plate mass:

14.13 × 8

= 113.04 kg

This calculation assumes a solid rectangular plate.

Bolt holes, cutouts, chamfers, and other machining features may affect the actual finished mass.

For procurement planning, calculations must distinguish between the gross stock material required and the finished component mass.

6. Structural Steel MTO Example for an Industrial Building

Consider a simplified structural steel package for an industrial building.

The material scope includes wide flange beams, steel columns, base plates, and connection plates.

The following example demonstrates how material quantities can be organized for procurement.

Sample Structural Steel Material Takeoff

Total Structural Steel Quantity

The calculated total is:

2,785.84 + 1,571.50 + 113.04 + 94.20

= 4,564.58 kg

Equivalent to approximately:

4.565 metric tonnes

Important Engineering Notes

This example is provided for material calculation purposes only.

It is not a complete structural design or fabrication schedule.

The calculation excludes items such as:

Additional connection components

Structural bolts and anchor assemblies

Welding consumables

Fabrication allowances

Cutting losses

Material procurement contingency

Surface coatings

Temporary erection materials

The example assumes that the specified grades and component details have been approved for the project.

Actual project requirements must be established from the complete engineering documentation.

7. How to Prepare a Structural Steel BOM

While an MTO provides overall material quantities, the BOM identifies the materials and parts associated with individual structural assemblies.

A fabrication BOM is generally developed from detailed shop drawings or an approved fabrication model.

7.1 Structural Steel BOM Hierarchy

A practical fabrication BOM may use several levels.

Level 1: Project

Example:

Industrial Warehouse Structural Steel Package

Level 2: Structural Assembly

Examples:

Column Assembly CL-01

Beam Assembly BM-01

Bracing Assembly BR-01

Level 3: Individual Components

Examples:

Wide flange section

Base plate

End plate

Connection plate

Stiffener plate

Level 4: Associated Hardware

Examples:

Structural bolt assemblies

Nuts

Washers

Connection accessories

The precise hierarchy depends on the fabrication management system.

7.2 Sample Steel Fabrication BOM

The following illustrative BOM references components from the preceding MTO.

Here, the example column assembly contains one column member and one base plate.

The gusset plates are shown as individually identified parts, pending allocation to their approved connection assemblies.

A final fabrication BOM would also identify relevant holes, connection details, welds, piece marks, and other shop requirements.

Why Assembly Marks Matter

Assembly marks provide a direct relationship between fabrication drawings and physical steel components.

For example:

CL-01

May identify a specific column assembly.

BM-01

May identify a beam assembly.

PL-101

May identify a particular connection plate.

These identifiers improve:

Fabrication tracking

Material inventory control

Workshop scheduling

Inspection documentation

Assembly identification

Shipment sequencing

Site erection efficiency

A complete BOM should allow individual parts to be traced to their parent assemblies and approved drawings.

8. MTO, Fabrication BOM, and Steel Cutting Lists

One important source of project cost variation is the difference between the finished steel quantity and the amount of raw steel that must be purchased.

Consider a structural beam that requires a finished length of 6,000 mm.

If the supplier provides stock material in 12,000 mm lengths, it may appear that two finished beams can be produced from one stock length.

However, actual cutting operations require consideration of:

Saw kerf

End trimming

Cut-length tolerances

Material defects

Fabrication allowances

Therefore, two exact 6,000 mm finished pieces cannot automatically be assumed to fit within a nominal 12,000 mm stock length.

The cutting plan must confirm sufficient available material.

Three Different Material Quantities

These quantities are related but may not be identical.

What Is a Steel Cutting List?

A cutting list specifies how raw steel material will be divided into finished components.

It typically includes:

Raw material identification

Stock length

Required cut lengths

Number of pieces

Cutting sequence

Saw kerf allowance

Remnant length

Material grade

Heat or batch identification where required

An optimized cutting list can reduce unusable offcuts and improve raw material utilization.

However, optimization must not compromise dimensional tolerances or material traceability.

9. How Much Waste Allowance Should Be Added to a Steel MTO?

There is no universal waste percentage suitable for every structural steel project.

Steel waste depends on several factors.

9.1 Stock Length Availability

A supplier may offer standard commercial lengths that differ from the dimensions required by a project.

This affects cutting optimization and remnant generation.

9.2 Structural Section Variety

Projects containing many different profile sizes may experience greater inventory complexity.

Offcuts from one profile cannot necessarily be reused for another.

9.3 Connection Plate Geometry

Rectangular plates, triangular gussets, irregular connection plates, and curved parts have different nesting efficiencies.

9.4 Fabrication Methods

Sawing, plasma cutting, laser cutting, drilling, and other processes create different material losses.

9.5 Design Revisions

Late engineering changes may cause previously purchased or fabricated components to become unsuitable.

Recommended Approach

Instead of applying an arbitrary allowance to the entire MTO, calculate procurement quantities by material category.

For rolled sections:

Procurement Length = Required Finished Length + Cutting and Stock Optimization Allowances

For steel plate:

Required Raw Plate Area = Total Required Blank Area ÷ Expected Nesting Utilization

For example, if a plate-cutting plan requires 20 m² of blanks and the demonstrated nesting utilization is 85%:

20 ÷ 0.85 = 23.53 m²

The corresponding purchasing requirement is approximately 23.53 m² of suitable plate stock, subject to actual plate sizes and nesting confirmation.

The 85% utilization rate is an illustrative planning assumption, not an industry-wide requirement.

Engineering contingency, fabrication scrap, site spares, and commercial weight tolerances should be tracked separately.

This prevents double-counting allowances and provides a clearer explanation of purchasing quantities.

10. Common Structural Steel MTO and BOM Errors

Errors in material takeoff and fabrication documentation can create significant downstream problems.

The following issues deserve particular attention.

Error 1: Using Incorrect Section Weights

Structural profiles with similar nominal depths may have very different masses.

For example, European HEA, HEB, and HEM sections belong to different section series.

Their flange and web dimensions differ.

Therefore, they should not be treated as interchangeable materials.

The section mass should always be obtained from the correct dimensional standard or verified section database.

Error 2: Mixing Measurement Units

International projects frequently use both metric and imperial units.

Common conversion errors occur when working with:

Millimetres and metres

Inches and feet

Kilograms and pounds

Metric tonnes and US short tons

Procurement files should clearly define the measurement system and conversion methods.

Error 3: Ignoring Connection Components

Connection plates, stiffeners, and bolting assemblies may be missing from preliminary engineering takeoffs.

Their omission can create material shortages and fabrication delays.

Error 4: Duplicating Materials

A connection plate may appear in both the engineering MTO and the fabrication BOM.

If these documents are combined without a consistent item-mapping system, the material may be counted twice.

Error 5: Using Outdated Drawing Revisions

A material list prepared from a superseded drawing may no longer reflect the latest structural design.

Every MTO and BOM must be linked to an identifiable document revision.

Error 6: Incorrect Material Grade Substitution

Selecting materials solely on the basis of nominal yield strength can overlook critical impact toughness or material certification requirements.

Material substitutions require technical review and authorization.

Error 7: Confusing Gross and Net Plate Weight

A connection plate may have a smaller finished mass after holes and cutouts are produced.

However, its procurement requirement depends on the raw plate or blank required for manufacturing.

Error 8: Applying Duplicate Waste Allowances

Adding fabrication scrap allowances at several stages can lead to excessive purchasing.

Every allowance should have a defined purpose and calculation basis.

11. How MTO and BOM Improve Structural Steel Procurement

Accurate MTO and BOM management can improve procurement decisions throughout the steel project lifecycle.

11.1 More Accurate Supplier Quotations

A properly prepared MTO provides suppliers with the information needed to identify and price suitable materials.

A professional structural steel RFQ should identify:

Incomplete information can lead to quotations based on different assumptions, making supplier comparisons unreliable.

11.2 Better Price Comparison

Steel may be quoted on different commercial bases:

Price per metric tonne

Price per kilogram

Price per piece

Price per fabricated assembly

Price per complete structural package

These quotations may include different levels of processing, inspection, transportation, and documentation.

For accurate comparisons, buyers should normalize the quotation scope.

A low price per tonne does not necessarily represent the lowest total project cost.

11.3 Improved Material Availability Planning

A structured MTO helps buyers identify which materials are:

Standard commercial sections

Non-standard lengths

Less commonly stocked sizes

Project-specific fabricated sections

Dependent on special testing

Subject to extended mill production schedules

These factors influence procurement sequencing and supplier selection.

11.4 Reduced Project Delays

Material shortages often arise from inaccurate quantities, missing connection components, or uncoordinated engineering revisions.

A controlled MTO and BOM workflow reduces these risks by providing a common reference for engineering, purchasing, fabrication, and logistics.

12. Quality Control Requirements for Structural Steel Procurement

Material quantity accuracy is only one part of successful structural steel purchasing.

Steel products must also comply with project specifications and applicable quality requirements.

12.1 Material Identification and Traceability

Depending on the project requirements, structural steel materials may need to be identified by:

Product specification

Material grade

Heat number

Batch or lot number

Section size

Manufacturer identification

Inspection documentation

Where heat-level traceability is required, identification must be maintained through relevant material handling and fabrication operations.

12.2 Mill Test Certificates

Mill Test Reports or Mill Test Certificates provide information used to verify material conformity.

Common information includes:

Steel grade

Chemical composition

Mechanical test results

Product dimensions

Heat identification

Applicable material specifications

For projects requiring EN 10204 Type 3.1 inspection certificates, this requirement should be clearly communicated before procurement.

An ordinary commercial certificate should not automatically be assumed to satisfy Type 3.1 requirements.

12.3 Dimensional Inspection

Inspection may include:

Section depth

Flange width

Web thickness

Flange thickness

Member length

Straightness

Squareness

Relevant dimensional tolerances

The applicable acceptance criteria depend on the specified product standard and project requirements.

12.4 Fabrication Inspection

Where fabricated structural steel components are included, additional controls may be required.

These can include:

Welding procedure documentation

Welder qualification

Fit-up inspection

Weld visual examination

Non-destructive testing

Bolt-hole inspection

Assembly dimensional verification

Coating inspection

Inspection requirements must be established according to the project execution specification.

For European structural steelwork, EN 1090-2 is an important reference for technical execution requirements.

For US structural steel projects, relevant AISC standards and the contractual project requirements must be considered.

13. Digital MTO and BOM Management: CAD, BIM, and Steel Detailing Software

Modern structural steel projects increasingly use digital engineering systems to prepare material schedules.

Common software platforms include:

Tekla Structures

Autodesk Revit

Advance Steel

Other CAD and BIM systems

These tools can support the extraction of material information from structural models.

Potential advantages include:

Automated Quantity Extraction

Model-based workflows can reduce repetitive manual measurements.

Assembly-Level Material Identification

Detailed fabrication models can associate individual components with specific assemblies.

Revision Tracking

Material changes can be compared across design revisions.

Fabrication Integration

Approved models may support the generation of shop drawings, cutting lists, and fabrication schedules.

Procurement Integration

Material information may be exported into spreadsheets or enterprise resource planning systems.

However, model-generated quantities are only as reliable as the underlying model.

A digital MTO can still contain errors if:

Structural members are missing

Model elements are duplicated

Material grades are undefined

Connection details are incomplete

Section properties are incorrect

Quantities are extracted from an outdated revision

Therefore, automated MTO generation does not eliminate the need for engineering verification.

14. Structural Steel MTO and BOM Revision Control

Engineering changes are common in structural steel projects.

A revised beam section, additional bracing member, or modified connection may affect material purchasing and fabrication activities.

A professional revision management process should identify:

The original engineering requirement.

The approved design change.

The affected MTO items.

The corresponding BOM components.

Materials already purchased.

Components already fabricated.

Additional materials required.

Materials that may become surplus.

The resulting procurement and delivery impact.

Recommended MTO Revision Register

The statuses shown are illustrative.

Actual document status codes must follow the applicable project document-control procedure.

Key Procurement Principle

Do not treat a revised material quantity as automatically available or already ordered.

MTO changes should be reconciled against purchase orders, material receipts, and fabrication progress.

This avoids both material shortages and unnecessary repeat orders.

15. How to Select a Structural Steel Supplier for MTO-Based Purchasing

International steel procurement requires more than finding a supplier capable of offering a particular beam size.

For project-based sourcing, buyers should evaluate the supplier's ability to understand engineering requirements and deliver conforming materials.

Technical Capability

Can the supplier identify the required section series, steel grades, and technical standards?

Material Availability

Can the supplier confirm stock availability, mill production requirements, and realistic supply conditions?

Processing Capability

Can the required cutting, drilling, or other processing operations be coordinated?

Quality Documentation

Can the supplier provide the specified material certificates and inspection records?

Project Coordination

Can the supplier manage changes in quantities, material specifications, and delivery priorities?

Export Logistics

Can the supplier coordinate suitable packaging, marking, loading, and documentation for international shipments?

These considerations are especially important for industrial construction, infrastructure, equipment platforms, and large steel fabrication projects.

16. Structural Steel Supply and Project Procurement Support from Dongmeng Group

Xi'an Dongmeng Group Co., Ltd. supplies structural steel products for international industrial and construction projects.

Our structural steel product range includes:

Carbon Steel H Beams

Wide Flange Beams

Structural I Beams

Steel Channel Sections

Equal and Unequal Steel Angles

Steel Plates and Flat Bars

Cold-Formed C and Z Purlins

Structural Hollow Sections

Selected Custom Fabricated Steel Sections

We support project-based material sourcing according to applicable ASTM, EN, JIS, and GB/T specifications.

For structural steel RFQs, our team can assist with reviewing:

1. Section Specifications

Identification of required structural profile types, dimensions, and grades.

2. Material Quantities

Review of material lists and calculated requirements provided by customers.

3. Material Availability

Coordination of available sections, required lengths, and potential mill supply options.

4. Processing Requirements

Assessment of cutting, drilling, and fabrication requirements according to supplied technical drawings and production feasibility.

5. Material Documentation

Coordination of specified material certificates and inspection requirements.

6. Export Delivery Requirements

Support for packaging, product marking, and international shipment arrangements.

Our objective is to help EPC contractors, steel fabricators, distributors, and industrial buyers establish clear technical purchasing requirements.

Final structural design approval, engineering calculations, and project-specific fabrication acceptance remain the responsibility of the designated qualified engineering and inspection parties.

17. Structural Steel MTO and BOM Procurement Checklist

Before issuing a structural steel purchase order, buyers should verify the following information.

A well-prepared purchasing package should allow suppliers to quote the same technical scope.

This makes technical clarification, commercial evaluation, and final procurement more reliable.

18. Frequently Asked Questions About Structural Steel MTO and BOM

1. What does MTO mean in structural steel?

MTO stands for Material Take-Off.

It is a structured list of structural steel materials and quantities extracted from engineering drawings, specifications, or models.

It supports estimating, procurement, and material planning.

2. What does BOM stand for in steel fabrication?

BOM stands for Bill of Materials.

In steel fabrication, it identifies individual components, material grades, dimensions, quantities, and associated assemblies needed for manufacturing.

3. What is the difference between a steel MTO and a BOM?

An MTO primarily identifies the materials and quantities required for a project.

A fabrication BOM identifies the individual parts and assemblies needed to manufacture the structural components.

The level of detail varies according to project stage and company practice.

4. Which comes first, MTO or BOM?

In a typical workflow, a preliminary MTO is developed during engineering or estimating.

A detailed fabrication BOM is usually prepared later, once shop detailing has progressed.

However, model-based engineering systems may generate both documents from related data.

5. How do you calculate structural steel quantities?

Structural section quantities are commonly calculated using the member length, number of members, and nominal unit mass.

For standard profiles:

Total Mass = Unit Mass × Length × Quantity.

For plates, mass can be estimated from geometric volume and material density.

6. Should bolt holes be deducted from steel plate weight?

It depends on the calculation purpose.

Finished component mass may account for holes and cutouts.

Procurement calculations should reflect the raw material or blank required for fabrication.

The calculation basis should always be documented.

7. What percentage of material waste should be included in an MTO?

There is no universally applicable percentage.

Waste allowances depend on stock lengths, section sizes, cutting methods, plate nesting, fabrication requirements, and material reuse opportunities.

Project-specific cutting optimization is preferable to applying an arbitrary percentage.

8. Can a structural steel BOM be generated from a 3D model?

Yes.

Steel detailing software can generate component schedules and BOM data from digital models.

However, the accuracy of the output depends on model completeness, correct material properties, and revision control.

9. What is the difference between theoretical steel weight and actual weight?

Theoretical weight is calculated using nominal dimensions or published section masses.

Actual weight is determined from the material supplied or measured.

Differences may result from permitted manufacturing variations and the agreed commercial weighing method.

10. Are structural bolts included in an MTO?

They should be included where structural bolting assemblies fall within the defined material procurement scope.

Bolts, nuts, washers, and anchor components may be listed separately from structural steel tonnage.

11. What information should be sent to a structural steel supplier for quotation?

A professional RFQ should include section designations, material grades, dimensions, quantities, processing requirements, applicable standards, inspection documentation, and delivery details.

Engineering drawings and MTO schedules should be included where available.

12. Can ASTM and EN structural steel grades be substituted during procurement?

Not automatically.

Differences in chemistry, mechanical properties, toughness, product requirements, and design specifications must be evaluated.

Any substitution should receive the required engineering and project approval.

Conclusion: Accurate MTO and BOM Management Improves Structural Steel Project Performance

Structural steel MTO and BOM documents form an important link between engineering design, material procurement, fabrication, and construction.

An accurate MTO helps project teams determine the required steel quantities, identify material specifications, and prepare purchasing budgets.

A detailed BOM supports fabrication by identifying individual parts, assemblies, and associated components.

For successful project execution, both documents should be supported by:

Approved engineering information

Correct structural steel specifications

Verified weight calculations

Controlled material revisions

Realistic procurement allowances

Appropriate inspection documentation

Effective supplier coordination

When these elements are properly managed, project teams can reduce material discrepancies, improve purchasing efficiency, and establish more reliable fabrication schedules.

For international buyers sourcing structural beams, channels, angles, plates, and other steel sections, working with a technically capable steel supplier can further improve procurement coordination.

Request a Structural Steel Quotation from Dongmeng Group

Xi'an Dongmeng Group Co., Ltd. supports project-based procurement of structural steel sections and related products for international customers.

If your project requires structural steel materials based on an MTO, BOM, or engineering drawing package, our team can review your requirements and prepare a quotation based on the confirmed technical scope.

Please provide:

Structural steel MTO or material list

Required steel grades and specifications

Section sizes, lengths, and quantities

Processing or fabrication requirements

Inspection and certification requirements

Project destination and delivery schedule

Contact Dongmeng Group to discuss your structural steel material requirements and request a project quotation.

Xi'an Dongmeng Group Co., Ltd.

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