Most industrial steel projects are not lost inside the calculation. They are lost at the handoffs between concept, analysis, detailing and fabrication. This page follows those handoffs in one line: how Coordinated engineering work keeps concept decisions, structural design and detailing in the same revision, what a steel structure structural analysis has to hand over before a detailing model is frozen, and which figures to ask for before members are released to production.
A steel structure package is judged at the handoffs rather than at the drawings. Each row below names the signal that should hold a project back until the engineering team answers it in writing.
| Handoff point | What good looks like | Red flag |
|---|---|---|
| 1. Where each stage ends | A named stage route (initial communication, preliminary scheme, structural system design, DfMA detailing, project support), so the handoff between stages is visible before work starts. | One price for "design" with no stage boundaries and no way to see what has actually been issued. |
| 2. Load cases and parameters | Wind, snow and seismic parameters written down together with the code basis they come from. | Loads described as "standard" or "normal" with no parameter values and no code reference. |
| 3. Materials and steel quantity | Material grades selected and an estimated steel quantity, so the cost of the frame is visible before detailing and fabrication. | Section sizes left to the fabricator after the tender has already been priced. |
| 4. Model handover | Member segmentation, node detailing, bolt holes and member numbering issued from the same model that the analysis was run on. | Detailing started from a drawing set that no longer matches the analysis revision. |
| 5. Cross-region code basis | Conversions between Chinese, U.S. and European standards documented, including material specification equivalents and deflection criteria. | One standard assumed for a building that will be fabricated and inspected against another. |
| 6. Transport and logistics | Member lengths and container limits considered in the segmentation, so members can actually be shipped and unloaded on site. | Segments and splice positions decided after the shop drawing has been released. |
| 7. Schedule realism | Published windows: inquiry answered within 24 hours, quotation and scheme framework in 2 to 3 working days, preliminary scheme in 3 to 5 working days once information is complete. | A delivery date promised before the parameters, code basis and material configuration are known. |
| 8. Revision control | One revision per stage with a named owner who confirms each gate before the next stage consumes it. | Analysis and detailing models running at different revisions with no record of which was approved. |
The work runs in five stages: initial communication, preliminary scheme design, structural system design, DfMA detailing and 3D modelling, then project support through production and installation. Each stage has an input and an output, and the value of the package is that the output of one stage is the input of the next instead of being re-created from scratch. The stage list, the parameters collected in each one and the information issued at the end are set out below.
These are the stage definitions, response windows and deliverables published on the service pages. Where a duration depends on the project, the condition is shown next to it rather than left implied.
| Property | Steel structure engineering service |
|---|---|
| Service | Steel structure design and DfMA engineering (engineering services, not product sales) |
| Location | Shenyang, Liaoning, China |
| Experience | 16+ years of steel structure engineering (claim on the solutions page) |
| Design standards | China, U.S. and Europe |
| Stage 01 - Initial Communication | Confirm building use, project location, basic dimensions, functional requirements, target market and special project conditions |
| Stage 02 - Preliminary Scheme Design | Define building form, main dimensions, door and window openings, roof slope, column grid direction and key configurations |
| Stage 03 - Structural System Design | Review applicable standards, conduct structural modelling, check wind, snow and seismic loads, select materials and optimise steel quantity |
| Stage 04 - DfMA Detailing and 3D Modelling | Detail nodes, bolt holes, member numbers, member segmentation and installation relationships for fabrication, container transport and assembly |
| Stage 05 - Project Support | Support production coordination, quality checks, packing, container loading and technical communication during site installation |
| Inquiry response | Usually within 24 hours |
| Quotation and scheme framework | Usually 2 to 3 working days, when the basic project information is clear |
| Preliminary scheme | Usually 3 to 5 working days, depending on information completeness and complexity |
| Structural system design timing | Confirmed by project scale and complexity |
| DfMA detailing timing | Confirmed by model accuracy and member quantity |
| Project types handled | Industrial steel buildings, warehouses and workshops, large-span buildings, space frame and roof structures, commercial steel buildings |
| Engineering services | Concept design and visual scheme engineering; structural analysis and value engineering; DfMA / Tekla steel detailing |
| Intake material | Drawings, or without drawings: building use, city, approximate size, envelope and opening requirements, crane or equipment needs, sketches or site photos |
| Deliverables | Design advice and preliminary layout, structural analysis, 3D detailing model, fabrication and installation information, material statistics, node detailing, material specification notes |
The same stage route is applied to different industrial building types, and the requirements that change are the loads, the code basis and the logistics rather than the process.
Workshops, warehouses and production halls are the projects where a missed connection detail is most expensive: the frame is fabricated in parallel with the envelope, so the analysis, the detailing model and the steel order have to carry the same revision.
Long-span roofs and space frames carry stability questions that a typical frame check does not answer. Wind uplift, dome or truss stability and erection sequence all have to be settled before segmentation is fixed.
Crane beams, corbels and column sections change when a crane or heavy equipment is added to the brief, so crane or equipment loads are collected in the first stage rather than after the structural system is sized.
Where a building is designed against one standard and fabricated or inspected against another, the conversion has to cover load combination philosophy, deflection criteria and material specification equivalents, not just section names.
Detailing covers node geometry, bolt holes, member numbering and segmentation, so the shop can cut, drill and pack from the model instead of interpreting a structural drawing set.
Member information, material statistics and installation relationships keep production, logistics and the site team working from the same information during fabrication, container loading and erection.
The intake path is published as three steps: initial review, requirement clarification and a recommended next step. The list below adds the windows that follow once the project information is complete.
An enquiry that names the building use, the city, the approximate length, width and eave height, the roof and wall requirements, the crane or equipment loads and the code basis can be reviewed without waiting for a complete drawing set.
The three pages on the customer site that carry the detail behind this summary.
The service list: international structural design, structural design of steel structures, DfMA deepening design, value engineering and project engineering review.
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The five-stage route from initial communication to project support, with the information each stage needs and the schedule factors that move.
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The project intake form: project type, stage, required engineering service, approximate building size, design code and drawings for an initial technical review.
View pageYes. Preliminary technical communication can begin with the building use, project location, approximate size, reference images or sketches. A more accurate quotation and structural design need further confirmation of loads, materials, local standards and project details.
Building use, country and city, approximate length, width and eave height, roof and wall requirements, door and window arrangement, crane or heavy equipment needs, and any available drawings or reference photos.
When basic project information is complete, a preliminary scheme usually takes 3 to 5 working days. Complex structures or missing key parameters may need technical clarification before the schedule is confirmed.
Building size, span, height, number of floors, local design codes, wind, snow and seismic parameters, crane or equipment loads, material choices, the envelope system, detailing depth and logistics conditions.
Depending on the agreed project scope, support can cover production coordination, material statistics, packing coordination, container loading checks and technical communication during site installation.
Usually within 24 hours. The reply confirms receipt of the inquiry and reviews whether the submitted information is complete; quotation and scheme framework usually follow in 2 to 3 working days when the basic project information is clear.
