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Pre-Engineered Steel Structure Building with 50 Years Life Span, Fireproof Design, and Hot Rolled H Steel Construction

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Qingdao KXD Steel Structure Co., Ltd

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Pre-Engineered Steel Structure Building with 50 Years Life Span, Fireproof Design, and Hot Rolled H Steel Construction

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Supply Ability :	5000ton/Month
Model Number :	KXD-SSW1059
Delivery Time :	30days
Payment Terms :	T/T
Price :	US$50.00-100.00
Certification :	ISO, SGS, CE, BV
Brand Name :	KXD

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Product Details
Company Profile

Pre-Engineered Steel Structure Building with 50 Years Life Span, Fireproof Design, and Hot Rolled H Steel Construction

Peb Light Steel Structure Fabrication Building Warehouse (KXD-SSB35)

Product Specifications

Model NO.	KXD-SSB54
Color Reference	Ral
Member of Engineering Team	20
Quality Control	Daily
Life Cycle	50 Years
Construction Period	60 Days
Customer Service	Aftersale Service
Porject Management	Turnkey Solution
Engineering Tools	Autocad
Type	H-Section Steel
Standard	GB
Forming	Hot-Rolled Steel
Carbon Structural Steel	Q235
Residential Wall Structure	Wall Support
Warranty	30 Year Limited Warranty
Transport Package	Seaworthy Package
Specification	SGS / ISO/ BV
Trademark	KXD, Low-alloy High-tensile Structural Steel
Origin	China
HS Code	9406900090
Production Capacity	5000ton/Month

Pre-engineered Structural Steel Building Overview

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 steel building model and design

Applications

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:

Industrial Applications

Factories
Workshops
Warehouses
Cold Storages
Steel Mills
Assembly Plants

Industrial pre-engineered building application

Commercial Applications

Showrooms
Supermarkets
Offices
Shopping Centers
Exhibition Halls
Restaurants
Logistic Centers
Multi-purpose Buildings

Commercial pre-engineered building application

Public & Other Applications

Schools
Hospitals
Conference Halls
Laboratories
Museums
Stadiums
Farms
Utility Shelters
Pump Stations
Aircraft Hangars
Airport Terminals

Key Advantages

Cost Savings

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.

Quick Erection

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.

Flexibility

Pre-engineered steel buildings are flexible in any requirement of design, easy to expand in the future and also economically with low transportation costs.

Energy Efficiency

Nowadays, pre-engineered buildings are the green solution for the environment with CO2 reduction, energy efficiency, and recyclability.

Building Components

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 / Main Frames

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.

Primary members of pre-engineered building

Secondary Members / Cold Formed Members

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) and will conform to the physical specifications of GB/ISO/CE or equivalent.

Roof & Wall Sheets/Panels

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

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.

Manufacturing Process

A: Material Receiving Procedure

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 material certificates and heat numbers
Preparation of Incoming Material Inspection Report

B: Material Preparation

Preparation of Plates:

Transfer drawings to storage device using expert software
Copy drawings into plate processing machine
Automated punching of part marks
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
Transfer to fit-up section after completion

C: Fit-up Process

Fabrication drawings issued by production engineer
Collection of prepared beams and connection details
Fixation of end plates, gusset plates, stiffeners, purlin cleats
Tack welding of components
QC inspection after fit-up completion

D: Welding & Grinding

Submerged Arc Welding Procedure:

Plan jobs to be welded
Clean welding locations 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 after completion

MIG Welding Procedure:

Similar process as submerged arc welding
Maintain fillet size parameters per GB50661-2011 standard
Post-welding cleaning and grinding
QC inspection after completion

E: Blasting Process

Tool Box Talk performed for every task
Recording of fabricated steel ID for traceability
Cleaning with high pressure air to remove surface dust
Automated blasting through conveyor system
Six internally mounted wheels for high-velocity blasting
Achievement of SA 2/2.5 surface preparation grade
Full PPE requirement for personnel

F: Painting Process

QC inspection of blasted surfaces
Atmospheric condition checks before application
Surface temperature: 23-40°C, Relative humidity: 50-85%
Application primarily by Airless spray
Paint material conformity checks
Wet Film Thickness monitoring during application
Three-coat painting system with site touch-up after erection

G: Loading and Shipping

Receiving finished components from painting department
Proper storage job-wise in yard
Arrangement of trucks from contract companies
Loading after job clearance confirmation
Documentation maintenance in job file

Quality Standards & Control

With 20 year warranty in the steel building industry, our company maintains strict quality standards. We have acquired ISO9001 and CE certificates and follow these related standards:

GB/T1591-2008/2018
GB/T11263-2010
GB/T 2518-2008
GB/T12754-2006
GB/T 1228-2006

Fillet Weld Size Quality Control

Purpose: To ensure 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.

Fillet Weld Leg Size Requirements:

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)
Edge welding limitations based on member thickness
Circular hole limitations: K≤(1/3)d
Maximum size without groove: 17mm

Fillet weld size definitions and illustrations

Fillet Weld Size Selection Guidelines

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)

Minimum Fillet Weld Size Chart

Parent Metal Thickness (t)(mm)	Minimum Fillet Weld Size
t≤6	3 (minimum 5 for crane beam)
6	5
12	6
t>20	8

H Section Manufacturing Equipment and Process

Steel plate cutting → H section assembly → Automatic welding → H section strengthening → Assembly → Manual welding → Shot blasting → Painting → Storage

I. Steel Plate Cutting

Quality checks and material verification
Precision setting-out by profession workers
CNC cutting equipment preferred
High purity gases for smooth cutting surfaces
Special imported cutting machines for grooves

Equipment Used:

Portable CNC Fire-cutting machine (CNCDG-1530)
Straight flame cutting machine (DZCG-4000A)
CNC cutting machine (CNC-4000C)
Radial drilling machine (Z3050*16/1)
Puncher machine (JH21-400)
Shearing machine (Q11Y-25*2500)

II. H Section Steel Assembly

Assembly on imported H section production line
4 hydraulic positioning system
Adjustment of flange parallelism and web perpendicularity
CO2 gas shielded welding for fixing

Equipment: H section steel assembly machine (Z20B)

III. Automatic Welding

Gantry-type submerged arc automatic welding
Specified welding sequence and parameters
Preheating for ultra-thick plates
Electrical heaters for temperature control

Equipment: Gantry-type submerged arc automatic welding machine (LHA5ZB)

IV. H Section Steel Strengthening

Correction of flange flatness
Flame correction for perpendicularity
Side bending correction
Flame temperature control: 600~800°C

Equipment: H section steel strengthening machine (YTJ60B), H section flange strengthening machine (HYJ-800)

V. Simulated Assembly of Component

Familiarization with component shop drawings
Model component re-checking
Accurate mark-up
First assembly inspection
Batch assembly after qualification

VI. Manual Welding

Manual welding processes as required for specific applications

VII. Shot Blasting

10-ramming heads shot blasting machine
Machine entry size: 1500*2500
Member size capacity: 1200*2000
Surface preparation grade: Sa2.5

Equipment: 10-ramming heads shot blasting machine (QH1525)

VIII. Painting

Even, flat, glossy painting surface
No cracking, peeling or pin holing
Standard thickness: 150μm indoor, 125μm outdoor
Allowable deviation: -25μm
Two coats primer: 40±5μm
Two coats finish paint: 60±5μm

Equipment: Airless sprayer (CPQ9CA)

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