Pre-Engineered Steel Building with 30 Year Limited Warranty, Customized Design, and Quick Erection
| Model NO. | KXD |
|---|---|
| Size | According to The Need of Design |
| Main Steel Frame Material | H Column |
| Roof and Wall | Sandwich Panel |
| Window | Aluminium Alloy or PVC |
| Door | Sliding Door or Roll up |
| Grade | Q235B |
| Connecting | Bolt |
| Delivery Port | Qingdao Port |
| Material | Steel Structure |
| Certification | ISO, CE, SGS |
| Customized | Customized |
| Warranty | 30 Year Limited Warranty |
| Transport Package | Seaworthy Package |
| Specification | SGS / ISO/BV |
| Trademark | KXD |
| Origin | China |
| HS Code | 9406000090 |
| Production Capacity | 15000 Square Meters Per Month |
Pre-engineered steel buildings are steel structures built over a structural concept of primary members, secondary members, roof and wall sheeting connected to each other and various other building components.
These buildings can be provided with different structural and non-structural additions such as skylights, wall lights, turbo vents, ridge ventilators, louvers, roof monitors, doors & windows, trusses, mezzanine floors, fascias, canopies, crane systems, insulation etc., based on customer requirements. All steel buildings are custom designed to be lighter in weight and high in strength.
Pre-Engineered Buildings are the most flexible solutions for contractors and owners. With advantages of low cost, high durability, perfect quality control and fast erection; PEBs are used for various applications:
- Factories
- Workshops
- Warehouses
- Cold Storages
- Steel Mills
- Assembly Plants
- Showrooms
- Supermarkets
- Offices
- Shopping Centers
- Exhibition Halls
- Restaurants
- Logistic Centers
- Multi-purpose Buildings
- Schools
- Hospitals
- Conference Halls
- Laboratories
- Museums
- Stadiums
- Farms
- Utility Shelters
- Pump Stations
- Aircraft Hangars
- Airport Terminals
Price per square meter can be 25%-30% lower than conventional steel buildings. Site erection cost is low because of faster erection times and easier erection process.
All steel components are fabricated at the factory and linked by bolts at the site. So the erection process is fast, step by step, easy to install and requires simple equipment. 60% less construction time required compared with traditional R.C.C (reinforced concrete) building.
Pre-engineered steel buildings are flexible in any requirement of design, easy to expand in the future and also economically with low transportation costs.
Nowadays, pre-engineered buildings are the green solution for the environment with CO2 reduction, energy efficiency, and recyclability.
Pre-engineered metal buildings consist of following components:
- Primary Members / Main Frames
- Secondary Members / Cold Formed Members
- Roof & Wall Panels
- Accessories, Buyouts, Crane System, Mezzanine System, Insulation, etc.
- Sandwich Panels
Primary members are the main load carrying and support members of a pre-engineered building. The main frame members include columns, rafters and other supporting members. The shape and size of these members vary based on the application and requirements.
Secondary structural framing refers to purlins, girts, eave struts, wind bracing, flange bracing, base angles, clips and other miscellaneous structural parts. Purlins, girts and eave struts are cold formed steel members which have a minimum yield strength of 345 MPa (50,000 psi).
Standard steel panels are 0.3, 0.4, 0.5 mm or 0.6 mm thick and have a minimum yield strength of 345 MPa. Steel panels are hot dipped and galvanized with zinc or zinc-aluminium coating. The base material is pretreated before applying a corrosion resistant primer and top coat.
Other building accessories include anchor bolts, fasteners (bolts, nuts, turnbuckle, expansion bolts), gutters, downspouts, doors, windows, ventilators, skylight panels, louvers and all other building-related materials.
- Verify receiving documents and quantity of received material
- Submit load for QC inspection
- Visual inspection for surface condition and damages
- Dimensional inspection for length, width, depth, thickness
- Verification of supporting documents like MTC
- Preparation of Incoming Material Inspection Report
Preparation of Plates:
- Drawings transferred to storage device using expert software
- Drawings copied into plate processing machine
- Automated machine senses plate length and processes according to NC files
- Punching of part mark on plate
- Drilling of plates as per NC files
- Plasma cutting of plates
Preparation of Beams/Tubes:
- Fabrication drawings prepared by design department
- Automated cutting and drilling machine processing
- Job transferred to fit-up section after completion
- Fabrication drawings issued for execution
- Prepared beams and connection items collected for fit-up
- End plates, gusset plates, stiffeners fixed by tack welding
- QC inspection after fit-up completion
Submerged Arc Welding Procedure:
- Plan jobs to be welded
- Clean welding location free of dust, oil, grease
- Set wire feed and voltage for welding
- Maintain fillet size parameters per GB50661-2011 standard
- Remove spatters and slag completely after welding
- Grind off burrs, sharp edges and excessive reinforcements
- QC inspection
MIG Welding Procedure:
- Similar process as submerged arc welding with MIG parameters
- Maintain fillet size parameters per GB50661-2011 standard
- Post-welding cleaning and grinding
- QC inspection
- Tool Box Talk performed for every task
- Working area barricaded with information notices
- ID of fabricated steel recorded for traceability
- Material cleaned with high pressure air
- Automated blasting process with six internally mounted wheels
- Material emerges fully cleaned (Grade - SA 2/2.5)
- Full PPE required for personnel
- QC inspection of blasted surfaces
- Ambient conditions checked and recorded
- Surface must be 3˚C above dew point temperature
- Relative humidity must be 85% or below
- Paint applied by Airless spray method
- WFT (Wet Film Thickness) readings taken during application
- Experienced spray applicators with appropriate PPE
Painting System Specification:
- Primer coat: Per project requirement
- Second coat: Per project requirement
- Third coat: Per project requirement
- Touchup at site - after erection
- Receive finished components from painting department
- Store properly job-wise in yard
- Arrange trucks from contract signed companies
- Loading starts after all details confirmed
- Copies of documents kept in Job file
With 20 year warranty in the steel building industry, our company maintains strict quality standards. We have acquired ISO9001 and CE certificates. Related standards we strictly follow:
- GB/T1591-2008/2018
- GB/T11263-2010
- GB/T 2518-2008
- GB/T12754-2006
- GB/T 1228-2006
Purpose: To ensure the quality of fillet weld, meeting technical requirements of welded members and improve standardization of fabrication.
Application Scope: Applies for design, fabrication and inspection of fillet weld size.
- All fillet weld size should not be less than drawing and design values
- Minimum fillet weld size: K≥1.5×√t (t = thickness of thicker welding member)
- Maximum fillet weld size: K≤1.2t (t = thickness of thinner welding members)
- For fillet weld on edge of welding members: when t≤6mm, K≤t; when t>6mm, K≤t-(1~2)mm
- For fillet weld in circular or trench holes: K≤(1/3)d
- Fillet weld without groove should not exceed 17mm
| Form of Fillet Weld Leg | K (Fillet Weld Size) Value | Note |
|---|---|---|
| Fillet weld without groove | K=(0.7~1)t and ≤15mm | For most steel structure buildings |
| Fillet weld without groove | K=(0.5~0.6)t | For strengthening ribs and secondary members |
| Fillet weld with groove (CJP and PJP) | K=t/4 and K≤10mm | For most steel structure buildings |
| Fillet weld with groove (CJP and PJP) | K=t/2 and K≤10mm | Important members (crane beams) |
| Parent Metal Thickness (t) (mm) | Minimum Fillet Weld Size |
|---|---|
| t≤6 | 3 (minimum value being 5 for crane beam) |
| 6 | 5 |
| 12 | 6 |
| t>20 | 8 |
Manufacturing Process: Steel plate cutting → H section assembly → Automatic welding → H section strengthening → Assembly → Manual welding → Shot blasting → Painting → Storage
Steel plate checked for design compliance. CNC cutting equipment preferred for quality and material saving. High purity gases used for smooth cutting surfaces.
Model: CNCDG-1530
Application: Steel plate cutting (5-100mm), beveling of edge
Model: DZCG-4000A
Application: Steel plate cutting (5-100mm), Y flange plate, web plate cutting
Model: CNC-4000C
Application: Steel plate cutting (5-100mm), irregular component cutting
Model: Z3050*16/1
Application: Maximum drilling diameter φ50mm, bolt-connection holes
Model: JH21-400
Application: Maximum stamping pressure-400 ton, plate punching
Model: Q11Y-25*2500
Application: Cutting width 2500mm, cutting thickness 3-25mm
Assembly on imported H section production line. 4 hydraulic positioning system presses flange and web plates. CO2 gas shielded welding for fixing.
Model: Z20B
Application: H type assembly, flange width 150-800mm, web height 160-2000mm
H section members hoisted into gantry-type submerged arc automatic welding machine. Preheating for ultra-thick plates using electrical heaters.
Model: LHA5ZB
Application: Assembly welding of H section steel up to 800mm×2000mm cross section
Correction of flange flatness using H section steel flange plate strengthening machine. Flame correction for perpendicularity when needed.
Model: YTJ60B
Application: Correcting deformation of I beam or H section, flange width 200-1000mm
Model: HYJ-800
Application: Correcting deformation, flange width 160-800mm
- Familiarize with component shop drawing and technical requirements
- Re-check model components by related department
- Accurate mark-up
- Inspect component after first assembly
- Pre-assembly for first group, batch assembly after qualification
Manual welding processes as required for specific components and connections.
Model: QH1525
Application: Shot blasting of section steels, up to Sa2.5 Grade
Surface of members must be even, flat, glossy with full painting. Standard thickness: 150μm indoor, 125μm outdoor.
Model: CPQ9CA
Application: Surface paint of structural members, Pressure ratio: 32:1
To ensure welding quality, meet technical requirements of welded members and improve standardization of fabrication.
Applies for design, fabrication and inspection of groove joint in manual arc welding, CO2 arch welding, mixed gas arch welding, submerged arc welding and electroslag welding.
Key Design Considerations:
- Minimize amount of filler metal
- Easy for beveling
- Convenient for welding operation and slag removal
- Minimize welding stress and deformation
Groove Direction Factors:
- Favor welding process and slag removal
- Minimize flip-flop during welding
- Consider way of fit-up in actual welding
| Mark | Welding Method | Penetration Type |
|---|---|---|
| MC | Shielded metal arch welding | CJP-complete joint penetration |
| MP | Shielded metal arch welding | PJP-partial joint penetration |
| GC | Shielded arch welding / Self-shielded arc welding | CJP-complete joint penetration |
| GP | Shielded arch welding / Self-shielded arc welding | PJP-partial joint penetration |
| SC | Submerged arc welding | CJP-complete joint penetration |
| SP | Submerged arc welding | PJP-partial joint penetration |
| SL | Electroslag welding | - |
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