Metal Fabrication Request for Quotation: The Information Factories Need for More Accurate Pricing and Faster Delivery

Procurement officers and project managers in the construction and industrial sectors face a recurring challenge when issuing metal fabrication orders. A client may submit a brief quotation request containing only a preliminary drawing or an estimated tonnage, only to experience weeks of delay or receive widely varying quotations with seemingly unjustified price differences. In most cases, this discrepancy is not caused by factory greed, but by unclear technical inputs that force the factory’s estimating engineer to assume the worst-case engineering scenarios and add substantial financial risk margins to cover the uncertainty—or issue repeated enquiries that consume valuable project time. Preparing a complete and comprehensive metal fabrication request for quotation is the key to obtaining a fair and competitive price, securing production and digital cutting capacity, and ensuring that materials reach the site without disputed variation orders. This guide, intended for contractors, engineering offices, and procurement teams in Saudi Arabia, outlines all the technical data and parameters that should be submitted to the factory to achieve highly accurate pricing and rapid execution.

Executive Summary for Project Managers and Procurement Officers:

• A complete RFQ data package reduces the time required by metal fabrication facilities to study and price the quotation by more than 50% and eliminates unjustified risk margins.
• Accurately specifying the metal grade according to a recognised standard, such as ASTM or EN, is essential for calculating raw-material costs, weldability, and mechanical forming requirements.
• Omitting non-destructive testing requirements and welding details can lead to major financial disputes when quality inspection reports are requested during handover.
• Compliance with Saudi regulations requires conformity certificates and Civil Defense-approved fire-resistant coating requirements to be specified before pricing begins.

1. The Factory Estimating Engineer’s Mindset: How Does Missing Information Become an Additional Cost?

When an estimating engineer at a metal-forming or structural steel factory receives an RFQ package, it is assessed through a three-part equation: raw-material cost, machinery and skilled-labour hours, and engineering risk.

If the drawings contain vague expressions such as “high-quality galvanized steel” or “suitable paint,” the factory is forced to assume the highest possible technical specifications to avoid losses after contract award. This may inflate the price excessively or lead the factory to include exclusions that make the quotation unsuitable for comparison.

Providing accurate technical information when submitting a metal fabrication request for quotation assures factory management that the project is properly controlled from an engineering perspective. This encourages the factory to submit direct and realistic pricing based on actual material-waste calculations through nesting optimisation and the most time-efficient use of laser-cutting and CNC metal-forming equipment.

2. Mandatory Engineering Information for Pricing Metal Products and Works

To obtain a prompt and reliable quotation, the request package should include five main data categories:

A. Standardised Raw-Material Description (Material Grade and Standard)

It is not sufficient to use general terms such as “steel,” “aluminium,” or “stainless steel.” The international material standard and thickness must be specified:

• Structural carbon steel: Specify the exact grade, such as ASTM A36, ASTM A572 Grade 50, or EN 10025 (S275JR/S355JR). Price differences between grades and their availability in the Saudi market directly affect both cost and schedule.
• Stainless steel: Specify the grade—Grade 304 for indoor applications or Grade 316L for coastal and industrial environments exposed to chemicals and chlorides—together with the required surface finish, such as No. 4 Finish, Hairline, or Mirror.
• Sheets and lightweight metals: Specify aluminium alloy numbers, such as 5052 or 6061, along with pre-galvanized coil grades and the zinc-layer thickness in microns.

B. Engineering Drawing Formats and Fabrication Models

Submitting static images or unclear PDF files forces the factory to redraw the components, adding engineering fees and delaying the quotation process:

• Two-dimensional drawings: DWG or DXF files containing plans, actual dimensions, hole centres, bending lines, and permitted tolerances.
• Three-dimensional models: STEP, STP, or IGES files for three-dimensionally formed parts, allowing them to be programmed directly into CNC machinery and digital press brakes.
• Shop and assembly drawings: For structural steel works, the drawings should clearly show connection details and distinguish between factory welds and site-bolted connections.

3. Technical Specification Matrix and Its Direct Impact on Pricing Accuracy

The following engineering table outlines the key elements of the quotation request and explains how each affects the pricing and fabrication of metal products:

4. Welding, Surface Treatment, and Saudi Building Code Compliance Requirements

Finishing operations following cutting and forming can account for more than 40% of the actual fabrication cost. Their requirements must therefore be clearly included in the metal fabrication request for quotation to prevent future disputes:

1. Welding and non-destructive testing specifications:
   • Specify the applicable American Welding Society standard, such as AWS D1.1 for structures or AWS D1.3 for sheet steel.
   • Specify the required inspection percentage: Is 100% visual testing sufficient, or are penetrant testing, magnetic-particle testing, or ultrasonic testing required for 10%, 20%, or 100% of critical connections?
2. Coating, galvanizing, and surface-protection systems:
   • Specify the surface-preparation grade by abrasive blasting, such as Sa 2.5 in accordance with ISO 8501-1.
   • State the coating type and dry-film thickness in microns: primer, intermediate coats, and UV-resistant polyurethane topcoat.
   • Specify the hot-dip galvanizing requirements and zinc-layer thickness according to the operating environment.
3. Compliance with the Saudi Steel Structures Code (SBC 306) and Civil Defense requirements:
   • Specify the requirements for intumescent fireproofing coatings on building sections and the required resistance period—one hour, two hours, or more—together with Civil Defense approvals for the applied systems.

5. Logistics, Packaging, and Site Assembly

Fabricated metal components may be damaged or distorted during loading, transportation, and unloading if packaging and delivery requirements are omitted during the quotation stage:

• Delivery terms (Incoterms): Clarify whether the requirement is for collection from the factory under Ex Works terms, delivery to the project site including transportation under DAP terms, or delivery including unloading and site installation.
• Marking and packing requirements: Require the factory to apply metal identification tags or weather-resistant part marks corresponding to the erection drawings, allowing components to be sorted and installed quickly and accurately on-site.
• Exceptional dimensions and weights: When fabricating large beams or long-span trusses, Saudi road-transport dimension limits must be identified so that the quotation includes the cost of special traffic permits and on-road escort services.

6. Quality Documentation and Manufacturing Control Package (MDR and Certifications)

The factory’s responsibility does not end with the fabrication and delivery of steel. Major projects and engineering consultants require a comprehensive Manufacturer Data Report (MDR) before final payments are released. The metal fabrication request for quotation should explicitly require the following documents:

• Original Mill Test Certificates issued by the steel manufacturers, including chemical analysis and mechanical properties in compliance with SABER and SASO requirements.
• Welder Performance Qualification certificates and approved Welding Procedure Specifications and Procedure Qualification Records.
• Independent laboratory inspection reports covering welded connections and coating and galvanizing thicknesses.
• Valid calibration certificates for all measuring and weighing instruments used during the factory’s final inspection.

7. Integrated Metal Fabrication Solutions with MEPCO

Leading construction and industrial projects in Saudi Arabia require an advanced factory capable of understanding complex drawings and providing alternative value-engineering solutions to reduce costs and improve manufacturability. This is provided through MEPCO Metal Industries.

MEPCO uses advanced laser-cutting technologies, digital press brakes, and qualified automated and manual welding lines to manufacture structural steel, panels, technical accessories, and architectural metalwork with exceptional accuracy.

MEPCO’s unique integration with its General Contracting division gives its engineering estimating team a comprehensive field perspective and a clear understanding of installation requirements and coordination with MEP systems and finishes.

This integration provides clients with accurate and transparent pricing that closes contractual gaps, along with strict fabrication schedules that protect project programmes and ensure that products comply with the highest requirements of the Saudi Building Code.

8. Checklist for Preparing the Request for Quotation Package

Before sending RFQ documents to metal fabrication factories, ensure that your package meets the following requirements:

• Have the shop drawings been attached in editable digital formats such as DWG, DXF, or STEP, including all sections and tolerances?
• Have the steel or aluminium material grade and nominal thickness been specified according to recognised standards?
• Have the required welding type and symbols, non-destructive testing percentages, and authorised inspection body been identified?
• Have the abrasive-blasting surface-preparation requirements and the coating or hot-dip galvanizing thicknesses been specified?
• Have fire-resistant coating requirements and Saudi Building Code and Civil Defense approvals been clarified where applicable?
• Has a detailed bill of quantities been attached, showing the exact number of components and the required site delivery schedule?
• Have site-delivery terms, marking and packaging procedures, and protection requirements during transportation and unloading been finalised?

9. Conclusion and Call to Action

Professionally preparing a comprehensive and detailed metal fabrication request for quotation is not merely a routine administrative step. It is the primary engineering safeguard for protecting project budgets against unexpected items and ensuring a fair and accurate comparison between competing factory quotations.

Accurate descriptions of materials and drawings allow fabrication teams to begin programming machinery and preparing production lines without delay or confusion. This transforms paper designs into durable physical structures in the shortest possible time and in accordance with the highest quality standards.

If you are preparing to issue a metal fabrication or structural steel package for your construction or industrial project and require accurate pricing from a manufacturing partner with advanced engineering technologies, contact the engineering team at MEPCO Metal Industries to discuss your drawings and project requirements and obtain a detailed technical and commercial quotation that supports the success of your investment.

2. FAQ Text—Ready to Copy into Word

Frequently Asked Questions

Q1: What is the difference between design drawings and shop drawings in a metal fabrication request for quotation?

A: Preliminary design drawings show only the overall dimensions, loads, and general sections of the elements and are not sufficient to begin accurate fabrication. Shop drawings detail every individual component, including its exact dimensions, hole locations, cutting angles, and welded-connection details. They are the primary execution documents used by estimating engineers to calculate operating costs and material waste accurately.

Q2: Why is it preferable to submit STEP and DXF files instead of PDF files alone?

A: PDF files require the factory engineer to re-enter dimensions and redraw components manually in design software, which takes considerable time and increases the likelihood of human error. In contrast, DXF and STEP files can be imported directly into laser and CNC machine software, reducing quotation-study time and allowing cutting times and material waste to be calculated with high accuracy.

Q3: How does specifying non-destructive testing percentages affect the quotation value?

A: The cost of basic visual inspection differs significantly from ultrasonic or radiographic testing, which requires approved third-party laboratories and certified technicians. If the testing percentage is not specified in the quotation request, the factory may omit its cost and subsequently claim it as an expensive additional item when the project consultant requests approved certificates.

Q4: Why is it important to specify fire-resistant coatings and their compliance with the Saudi Building Code in the pricing documents?

A: Intumescent fire-resistant coating systems are expensive and require specific thicknesses and preparation procedures according to the occupancy classification under the Saudi Building Code (SBC 306). Omitting the required fire-resistance period—such as one or two hours—may result in standard industrial paint being quoted. This can cause the facility to be rejected by Civil Defense and result in substantial costs for removing and reapplying the coating on-site.

Q5: What is a nesting plan, and how does accurate information help reduce the price?

A: Nesting is an advanced software-based process that arranges the components to be cut across raw metal sheets at the highest possible density to minimise scrap. When the client provides clear quantities and digital drawings, the factory can reduce waste and calculate raw-material costs based on the useful components only, resulting in a tangible reduction in the final quotation.