Product Overview
Prefabricated Construction and modular homes are sectional prefabricated buildings consisting of multiple sections called modules. This modular construction method differs from traditional stick-built approaches. The modules are six-sided boxes constructed in an exterior facility, then delivered to their intended site. Using a crane, the modules are set onto the building's foundation and joined together to create a single building. Modules can be placed side-by-side, end-to-end, or stacked, allowing wide variety of configurations and styles.
Modular buildings differ from mobile homes in two key ways. First, modular homes do not have axles or a frame and are transported via flat-bed trucks. Second, modular buildings must conform to all local building codes, while mobile homes follow federal codes. Some residential modular buildings built on steel frames (on-frame modular) meet local building codes and are considered modular homes rather than mobile homes.
Technical Specifications
Single Module Dimensions
- ISO standard dimensions of 20 feet STANDARD containers (optionally 10 up to 30 feet)
- Length: 6.058 mm (optionally 3.048 - 9.100 mm)
- Width: 2.438 mm (optionally 3.000 mm)
- Exterior Height: 2.591 mm (optionally 2.791 mm or 3100 mm)
- Inner Height: 2.300 mm (optionally 2.500 mm or 2800 mm)
Construction Details
Container Construction: ZINCED metal profiles 3 mm connected with screws
Container Painting:
- Option: On customer wish in RAL color
- Option: Painted on customer wish in RAL color
Container Floor Options:
- Without forklift pockets
- Option: With forklift pockets for containers up to 7.335 mm
- Holes distance: 1.506mm
Exterior Wall and Side Panels:
- 50 mm polyurethane panel, externally micro-corrugated RAL 9002, internally smooth RAL 9010 (white)
- Option: 60 mm mineral wool, both side plastificated in RAL 9002
- Option: 60 mm mineral wool, both side plastificated in RAL 9002, internally enriched chipboard 100 WHITE010 (white)
- Option: 80 mm polyurethane panel, both side plasticated steel plate RAL 9010 (white)
- Option: 100 mm polyurethane panel, both side plasticated steel plate RAL 9010 (white)
- Option: 100 mm mineral wool, both side plasticated steel plate RAL 9010 (white)
- Option: 120 mm mineral wool, both side plasticated steel plate RAL 9010 (white)
Exterior and Inner Walls: PVC with polyurethane filling 40 mm, clear opening 79/202 cm
Windows and Doors:
- Option: Windows without shutters
- Option: Windows with shutters
Thermal Insulation Coefficients:
- Floor - U = 0.37 W/m²K
- Roof - U = 0.39 W/m²K
- Wall panels - U = 0.41 W/m²K
- Windows - U = 2.40 W/m²K
KXD H-Section Manufacturing Process
I. Steel Plate Cutting
H-section steel plates are checked against design requirements. CNC cutting equipment ensures precision with high-purity gases for smooth, notch-free surfaces.
Portable CNC Fire-cutting machine
Model: CNCDG-1530
Application: Steel plate cutting (5-100mm thickness), edge beveling
Straight flame cutting machine
Model: DZCG-4000A
Application: Steel plate cutting (5-100mm thickness), effective cutting width: 3200mm
CNC cutting machine
Model: CNC-4000C
Application: Steel plate cutting, irregular component cutting, effective cutting width: 3200mm
Radial drilling machine
Model: Z3050*16/1
Application: Maximum drilling diameter φ50mm, bolt-connection hole processing
Puncher machine
Model: JH21-400
Application: Maximum stamping pressure-400 ton, plate punching, blanking, bending
Shearing machine
Model: Q11Y-25*2500
Application: Cutting width 2500mm, cutting thickness 3-25mm
II. H-Section Steel Assembly
Assembly on imported H-section production line using hydraulic positioning system. CO2 gas shielded welding for fixing.
H section steel assembly machine
Model: Z20B
Application: H-type assembly, flange width 150-800mm, web height 160-2000 mm
III. Automatic Welding
Gantry-type submerged arc automatic welding with specified sequence and parameters. Preheating for ultra-thick plates.
Gantry-type submerged arc automatic welding machine
Model: LHA5ZB
Application: Assembly welding of H-section steel up to 800mm×2000mm cross section
IV. H-Section Steel Strengthening
Correction of flange flatness and perpendicularity using specialized strengthening machines. Flame temperature controlled at 600-800°C.
H section steel strengthening machine
Model: YTJ60B
Application: Correcting deformation of I-beam or H-section steel flange plate
H section flange strengthening machine
Model: HYJ-800
Application: Correcting deformation of I-beam or H-section steel flange plate
V. Simulated Assembly
Component familiarization, model component testing, accurate mark-up, and quality inspection procedures.
VI. Manual Welding
Precision manual welding for specialized applications and complex joints.
VII. Shot Blasting
Surface preparation achieving Sa2.5 grade cleanliness.
10-ramming heads shot blasting machine
Model: QH1525
Application: Shot blasting of section steels, welded members and steel plates
VIII. Painting
Even, flat, glossy painting without cracking, peeling or pin holing. Standard thickness: 150μm indoor, 125μm outdoor.
Airless sprayer
Model: CPQ9CA
Application: Surface paint of structural members, pressure ratio: 32:1
Welding Quality Control Standards
Purpose: Ensure welding quality meets technical requirements and improve fabrication standardization.
Application Scope: Manual arc welding, CO2 arc welding, mixed gas arc welding, submerged arc welding and electroslag welding.
Welding Groove Design Considerations
- Minimize the amount of filler metal
- Easy for beveling
- Convenient for welding operation and slag removal
- Minimize welding stress and deformation
Welding Process Illustrations
