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Views: 0 Author: Site Editor Publish Time: 2026-08-21 Origin: Site
The construction of a steel structure workshop involves a coordinated process covering foundation preparation, structural steel fabrication, site installation, enclosure installation, surface treatment, and final inspection.
A typical construction sequence is:
Setting Out → Anchor Bolt Installation → Steel Fabrication → Steel Column Erection → Steel Beam Installation → Crane Beam Installation → Roof Structure & Purlins → Roofing Installation → Wall Cladding → Surface Coating → Final Inspection
Proper control at every stage is essential to ensure structural accuracy, installation efficiency, safety, and long-term durability.
Accurate setting out provides the foundation for successful steel structure installation.
Before construction begins, the project team verifies the building axes, elevations, column positions, and foundation dimensions according to the approved drawings.
Typical procedures include:
Checking reference axes using surveying instruments.
Confirming foundation elevations with leveling equipment.
Clearly marking column centerlines and installation reference points.
Identifying the exact position of each steel column base.
Checking anchor bolt positions before steel erection.
Special attention should be given to the alignment between column base plates and anchor bolts. Incorrect positioning may cause installation difficulties, bolt deformation, or inadequate contact between the base plate and concrete foundation.
Anchor bolts connect the steel columns to the concrete foundation and therefore require precise positioning.
Before concrete pouring:
Verify anchor bolt diameter, length, spacing, elevation, and position.
Secure the anchor bolts using positioning templates or fixing frames.
Protect threaded sections from concrete contamination.
Recheck alignment before concrete placement.
During concrete pouring, designated personnel should monitor anchor bolt movement and immediately correct any displacement.
After concrete curing, residual concrete and contamination around the exposed threads should be removed before steel erection.
Steel fabrication is one of the most important stages of the entire project. Components are normally manufactured in a controlled factory environment before being transported to the construction site.
Before fabrication, steel plates, sections, welding materials, bolts, and coatings should be inspected.
The inspection normally includes:
Material grade
Dimensions and thickness
Surface condition
Material certificates
Project specification compliance
Only qualified materials should enter the production process.
Fabrication drawings are reviewed before cutting.
Important information such as:
Cutting dimensions
Bolt hole positions
Connection plates
Stiffener positions
Centerlines
Assembly marks
Welding requirements
should be clearly identified.
Allowances for cutting, machining, welding shrinkage, and installation should also be considered where required.
Steel plates and sections can be processed using CNC flame cutting, plasma cutting, laser cutting, sawing, or other suitable equipment depending on the material and component requirements.
Before cutting, rust, oil, dirt, and other contaminants should be removed from the cutting area.
After cutting:
Slag and spatter are removed.
Cut edges are inspected.
Dimensions are checked.
Components are prepared for the next fabrication stage.
Cut surfaces should be free from cracks, serious defects, and unacceptable deformation.
Before assembly, steel plates and sections should be straightened when necessary.
Components are positioned according to fabrication drawings and temporarily fixed before final welding.
During assembly, technicians check:
Section dimensions
Centerline alignment
Plate position
Verticality
Connection accuracy
Overall geometry
After inspection, each component is marked with an identification number for production tracking and later installation.
Steel columns and beams may be welded using automatic submerged arc welding, gas-shielded welding, manual welding, or other qualified processes depending on the component design.
Before welding:
Welding areas should be clean.
Rust, oil, moisture, scale, and contamination should be removed.
Welding consumables should be properly stored and prepared.
Welding parameters should follow the approved welding procedure.
During production, welding quality is monitored to control defects such as porosity, undercut, incomplete fusion, distortion, and cracking.
Completed welds are inspected according to project requirements.
Bolt holes are produced according to fabrication drawings using drilling or CNC processing equipment.
Inspection focuses on:
Hole diameter
Hole spacing
Edge distance
Hole position
Connection alignment
Accurate hole processing helps improve the efficiency of site assembly and bolted connections.
Heat generated during welding may cause deformation in steel members.
Straightening equipment can therefore be used to correct:
Flange deformation
Beam bending
Column distortion
Local plate deformation
After straightening, components are inspected again to confirm dimensional accuracy.
Where required, the ends of welded beams and columns may be cut, milled, or machined to achieve the specified dimensions and contact surfaces.
Accurate end preparation helps ensure proper connection and alignment during installation.
Surface treatment is important for improving coating adhesion and protecting structural steel against corrosion.
Steel members can be cleaned using shot blasting or abrasive blasting equipment to remove:
Rust
Mill scale
Welding residue
Surface contamination
After blasting, the steel surface should be cleaned before coating.
Depending on the project environment and specification, corrosion protection may include:
Anti-corrosion primer
Intermediate coating
Finish coating
Zinc-rich primer
Hot-dip galvanizing
Other specified protective systems
Coating thickness and appearance should be inspected according to the approved project requirements.
After fabrication and inspection, components are prepared for delivery.
Each member should be clearly identified according to the erection drawings.
Before shipment:
Components are checked for damage.
Coated surfaces are protected.
Small parts and connection accessories are packed separately.
Components are arranged according to installation sequence where practical.
Proper packaging helps reduce damage during lifting, loading, sea transportation, unloading, and site storage.
Before structural steel components leave the factory, quality inspections may include:
Material verification
Dimensional inspection
Welding inspection
Bolt hole inspection
Surface treatment inspection
Coating thickness inspection
Component identification
Packing inspection
Typical project documentation can include:
Material certificates
Product inspection records
Welding records
Coating inspection records
Fabrication drawings
Packing lists
Component delivery lists
Before erection begins, the installation team should confirm that the concrete foundation and fabricated steel components meet project requirements.
Preparation normally includes:
Checking foundation axes and elevations.
Inspecting anchor bolt positions.
Reviewing erection drawings.
Preparing lifting equipment.
Planning the erection sequence.
Checking structural components against the packing list.
Arranging components near their installation locations.
This preparation helps reduce unnecessary handling and improves installation efficiency.
Steel columns are normally among the first major structural members installed.
Before lifting, the lifting points and rigging method should be confirmed.
During erection:
Lift the steel column carefully.
Align the base plate holes with the anchor bolts.
Lower the column into position.
Install and temporarily tighten the anchor nuts.
Check column position and verticality.
Adjust the column as required.
Secure the column before removing lifting equipment.
Surveying instruments are used to monitor vertical alignment during installation.
Steel beams are installed after the columns have been positioned and temporarily stabilized.
A typical process includes:
Selecting suitable lifting points.
Lifting the beam into position.
Aligning beam-to-column connections.
Installing temporary bolts.
Adjusting elevation and alignment.
Installing high-strength bolts or completing required welding.
Performing final inspection.
Structural stability must be maintained throughout the erection process.
For industrial steel workshops equipped with overhead cranes, crane beams are installed according to the approved structural drawings.
Special attention is given to:
Beam elevation
Horizontal alignment
Span dimensions
Connection accuracy
Rail installation requirements
Accurate installation is critical for the reliable operation of crane systems.
After the main steel frame is erected and adjusted, secondary structural members are installed.
These may include:
Roof purlins
Wall girts
Horizontal bracing
Vertical bracing
Tie rods
Sag rods
Purlins are generally bolted to brackets or supporting members.
During installation, spacing, alignment, and straightness should be checked carefully because these members directly affect the installation quality of roofing and wall cladding.
High-strength bolted connections are widely used in steel structure construction.
Before installation, connection surfaces should be clean, dry, and free from oil, loose scale, welding spatter, or other contaminants.
Important installation requirements include:
Bolts should pass through holes freely without forced hammering.
Bolt holes should not be enlarged using uncontrolled thermal cutting.
High-strength bolts should not normally be used as temporary erection bolts.
Tightening should follow the specified sequence.
Bolts should be tightened from the center of the connection toward the edges where applicable.
Initial tightening and final tightening should follow the approved installation procedure.
Completed connections should be inspected according to the project specification.
Wall cladding is installed after the main structural frame and secondary members have been properly aligned.
Before installation:
Check panel types, dimensions, and quantities.
Inspect damaged panels and flashing.
Verify wall girt alignment.
Remove welding residue and other obstructions.
Prepare required sealants, fasteners, and accessories.
Wall panels are typically installed sequentially from one end of the building.
During installation:
Maintain vertical alignment.
Control panel overlap.
Tighten fasteners correctly.
Seal joints where required.
Complete flashing and waterproofing details.
Proper installation helps improve the building's appearance, weather resistance, and service life.
Roof installation normally begins after the main structural system, purlins, and bracing are completed.
Roof panels should be arranged according to the approved installation drawings.
During installation:
Start from the designated end of the building.
Maintain correct panel orientation.
Check roof slope continuously.
Keep panel ribs aligned.
Avoid unnecessary transverse joints where possible.
Handle panels carefully to prevent scratches and deformation.
Install fasteners and sealing materials according to system requirements.
Good alignment is particularly important around the ridge and roof edges.
After the main roof panels are installed, ridge caps, trims, and flashing are fitted.
Sealant or sealing strips may be used where required to improve waterproof performance.
Flashing should be installed with:
Correct overlap direction
Secure fastening
Straight and consistent alignment
Proper sealing
Effective water drainage
These details play an important role in preventing water penetration into the building.
Although structural steel is normally coated in the factory, transportation and installation may cause minor damage to the protective surface.
Before touch-up painting:
Remove dirt, rust, welding slag, oil, and damaged coating.
Clean and prepare the affected surface.
Apply the specified repair primer and finish coating.
Check coating continuity and appearance.
The coating system should always follow the approved project specification and the requirements of the selected protective system.
After construction is completed, the steel structure should undergo a final quality inspection.
Typical checks include:
Column verticality
Beam alignment
Structural dimensions
Bolt connections
Welded connections
Bracing installation
Roof and wall panel alignment
Waterproofing details
Surface coating
Overall appearance
Any non-conforming items should be corrected before final project acceptance.
A successful steel structure workshop project depends on accurate fabrication, careful quality control, organized transportation, professional erection, and strict installation inspection.
From material preparation and steel fabrication to column erection, beam installation, roofing, wall cladding, and final coating, every step has a direct impact on structural safety, construction efficiency, and long-term performance.
ZSJH Steel provides one-stop steel structure solutions covering detailing, material preparation, structural steel fabrication, welding, quality inspection, surface treatment, export packaging, and technical support.
We manufacture customized steel structures for:
Industrial workshops
Steel structure warehouses
Logistics centers
Manufacturing plants
Commercial buildings
Agricultural buildings
Aircraft hangars
Multi-story steel buildings
Custom industrial steel projects
Have a steel structure project? Send us your drawings, dimensions, material requirements, and project specifications for a customized fabrication solution and quotation.
