Seeking for a solution to your construction employee's official request?How about considering modular house?
For any construction enterprise,it is a common thing to deploy the installation workers to local construction site to fulfill their duties.However,the worker's safety and well-being must come first at any circumstances which is foundamentally provide them satified accommodation,catering and leasurement options at spare time.On the other hand,considering the high requirements of mobility and easy-to-assemble for the auxiliary house/building.modular house is definitely a reliable choice.
You may wonder what is exactly the define of a modular house system.To start with,Modular House is a term used to describe the use of factory-produced pre-engineered building units that are delivered to site in Modules. The modular units may form complete rooms, or parts of rooms.
Modular houses are generally made into six sided boxes constructed in a factory, then delivered to site and using a crane, the modules are set onto the building's foundation and joined together to make a single building. The modules can be placed side-by-side, end-to-end, or stacked, allowing a wide variety of configurations and styles in the building layout.
Till now,you may get a little hint of what a modular house is.But the truth is there are still many things about modualr house to explore.So how about getting to read the following informations about KXD's unique modular house system?I'm sure that you will know deeper about the modular house system after reading the informations.
General
The modular unit or container is designed as a light solid construction consisting of floor and roof frames and corner profiles. The system enables compounding of individual containers in longitudinal and transverse directions without limits. It also enables compounding of containers in 2 floors in height (ground floor + first floor), or in 3 floors in height for warehousing of these containers (ground floor + 2 floor). Wainscots of the container are made of light insulation panels and offer pleasant climate in the interior due to their building and physical properties.
Dimensions and Tare (ISO Standard 1161)
- External length 20'/ (inner length) 20′: 6.055m/(5.851m)
- External width/ (inner width): 2.435m/(2.231m)
- External height/inner height: 2.790m/(2.510m)
- Tare: 1950 Kg
(1)Steel Framework
Material::cold formed steel profiles in a thickness of 3 to 4mm (bottom rails).
Surface working::shot blasting, epoxy ground coat in a thickness of 30 μm, final vinyl acrylic coat in a thickness of 60-70 μm.
Fittings:8 corner fittings (dimensions according to ISO standard 1161), rainwater pipe in the roof framework, plate thickness of 10mm excluding top corner fittings of the top kit of each bundle (20mm thickness)
Forklift openings:openings for fork-lift pockets in the floor framework, dim 88*250mm in a distance of 1700 mm
(2)Floor Composition
External wainscot:flat galvanized steel sheet metal in a thickness of 0.5mm.
Insulation filling: noncombustible mineral wool in a thickness of 100 mm among hollow steel transverse supports. Mineral wool density:50 Kg/m
3
Steam blockade: PE foil in a thickness of 80 μm
Cement board:
CCA boards (Cellulose Fiber Cement Board, Autoclaved)
in a thickness of 18 mm Density: 1500Kg/ m
3
Reaction to Fire Classification:A1 certified ISO EN 13501
PVC flooring covering in a thickness of 1.5mm
Permitted loading: 4 .5 KN/m2 or 6 KN/m2 (reinforced under-structure)
K value: 0.45 W/ m2K
R value (Thermal Resistance) = 2.2 m2K/W
(3)Ceiling Composition
(50mm sandwich mineral wool panel)
External wainscot: 1.6 mm thick corrugated "ISO" roof,CORTEN made,and shot blasted&painted.
Steam blockade:PE foil in a thickness of 80μm
Insulation filling:noncombustible mineral wool in a thickness of 50 mm among 30X50X2 mm steel square bars. Mineral wool density: 50 Kg/ m3
Ceiling made of 50 mm thick mineral wool sandwich panels screwed to the steel beams of the roof frame. Sandwich panel composition:
Meteor water outlet: 4 each of PVC rainwater pipes, diameter 50mm in corner pillars
K value: 0.45 W/ m
2K
R value (Thermal Resistance) = 2.2 m
2K/W
Galvanized and painted steel sheet metal on both sides. Steel thickness: 0.5mm, white color
Insulation filling: mineral wool in a thickness of 60mm, density 120 Kg/m3
Permitted loading (standard roof) : 2.1 KN/m2
(4)Facade Walls
Sandwich mineral wool
Side panels' width:1140mm; total panel thickness: 60mm.
Five panels fit into the long side and two panels fit into the short side of
container and they are fully interchangeable
Composition:
External wainscot:
Galvanized and painted steel sheet metal in a thickness of 0.5mm, white
color
Insulation filling:
Mineral wool in a thickness of 60mm
Inner wainscot:
Galvanized and painted steel sheet metal in a thickness of 0.5mm, white color.
Permitted loading: 100 kg/m
2
Mineral wool density: 120 Kg/m
3
K value: 0.71 W/ m2K
Fire rating: 36 minutes according to GB 12955-91 and 20 minutes according to BS 476
(5)Doors
External Aluminum door. Single fold, 40mm thick, made of:
- a frame in pre painted aluminum
- hot galvanized and pre painted steel sheets (inside and outside)
- insulated with PL (polystyrene)
- Net opening dimensions: 820 x 1985 mm; furnished with a handle lock with 3 keys.
Composition:
- External frame: galvanized and painted steel profiles, thickness 0.7 mm
- External and internal wainscot: galvanized and painted steel sheet metal in a
thickness of 0.7mm.
- Equipped with 3 hinges, lock and anti-burglary flange
- Insulation filling: non-combustible mineral wool in a thickness of 50mm.
- Mineral wool density: 60 Kg/m3
Windows
Made of PVC, white color, with dimensions 800 to 900 mm× 1100 to 1200mm,
- glazed with double layer glass in a thickness of 4/15/4mm, with "tilt & swing"
- Mechanism with aluminum made rolling shutters
(5)Electrical Installations
- Standard: UK Specification
- Voltage: 220 V, 50 Hz single phase
- Network connections: suitable-connection plug/socket, 3-5 poles 32 A +, 220V ~ mounted on the top frame in upper corners of a shorter side wall
- Inner distribution system: cables of suitable dimensions (6, 2.5, 1.5 mm2 for 220 voltage, flush-mounted.
- Protection: protective current switch (40 A +/2E/4E-0,03A), automatic fuses (C-characteristics) of suitable power (6A, 10A, 16A, 20A)
- Earthing: galvanized connector with a steel plate of dimensions 30x80mm welded on the bottom frame
- Fittings:
- Electric distribution box - 1×40A+/2E/4E-0.03A (protective current switch), 1×10A & 2×16A as standard lay out (automatic fuses)
- Double fluorescent lights 2×36W 220V- 2 each Philips IP 65 rated
- Option: "PRC" neon lights IP 65 rated
- Low level flush-mounted illuminated double sockets 220 V/110 V - 3 each
- Low level flush mounted illuminated double socket 220V/110V with double SUB port - 1 each
- Flush-mounted switches 220 V/110 V - 1 each
(6)Possibilities of Container Mounting
- On a flat solid surface (asphalt, concrete,)
- On point foundations (concrete cubes, dimensions 30/30/30cm, 6 pc/20' container)
- On band foundations (concrete band, 30cm wide, on the container circumference)
- Certification: Dimensions, weight, payload and stacking are RINA certified. Certificates available for components.
- Delivery: Containers can be delivered assembled or individually - in kits 648 mm high.4 kits can be bundled in packages 2591 mm high (ISO
dimensions)
- Remark: Rights to technical changes are reserved.
Technical characteristics of containers type elements
| ISO standard dimensions of 20 feet EUROSTANDARD and STANDARD containers - optionally 10 up to 30 feet |
| lenght = 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) |
| container construction difference |
| ZINCED metal profyles 3 mm connected with scres |
| container painting |
| option: on customer wish in RAL color |
| option: painted on customer wish in RAL color |
| container floor opening for forklift |
| without forklift pockets |
| option: with forklift pockets for containers up to 7.335 mm |
| holes distance 1.506mm |
| container roof construction |
| container exterior wall and side panels |
| 50 mm poliurethane panel, externally microcorrugated RAL 9002 |
| internally smooth RAL 9010 (white) |
| option: 60 mm mineral wool, bothside plastificated in RAL 9002 |
| option: 60 mm mineral wool, bothside plastificated in RAL 9002, internally enriched chipboard 100 WHITE010 (white) |
| option: 80 mm poliurethane panel, bothside plasticated steel plate RAL 9010 (white) |
| option: 100 mm poliurethane panel, bothside plasticated steel plate RAL 9010 (white) |
| option: 100 mm mineral wool, bothside plasticated steel plate RAL 9010 (white) |
| option: 120 mm mineral wool, bothside plasticated steel plate RAL 9010 (white) |
| container exterior and inner walls |
| PVC with polyurethane filling 40 mm, clear opening 79/202 cm |
| container windows and doors |
| option: windows without shutters |
| option: windows with shutters |
| container isolation, coefficient of thermal resistance |
| 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 |
| No. |
Sort |
Name |
Specification |
| 1 |
Specification |
length |
No limited |
| 2 |
Width |
Less than 11m |
| 3 |
Wall height |
2600mm/2800mm |
| 4 |
Clear height |
2600mm/2800mm |
| 5 |
Roof slope |
15° |
| 6 |
Standard accessory |
Wall board |
75mm thickness double color-steel sandwich panel with polystyrene foam inside. Heat Insulated coefficient is 0.041w/m.k. Heat transfer coefficient is 0.546w/ m².k. |
| 7 |
False ceiling |
75mm thickness double color-steel sandwich panel with polystyrene foam inside. Heat Insulated coefficient is 0.041w/m.k. Heat transfer coefficient is 0.546w/ m².k. |
| 8 |
Roof board |
color steel corrugated sheet, 0.5mm thickness |
| 9 |
Outside door |
Security door, single door with dimensions of 900*2100mm, furnished with a handle lock with 3keys. Doorframe is made of 1.2mm steel, and door is made of 0.7 mm steel, 90mm thick rock wool insulation foam. |
| 10 |
Inside door |
SIP, single door with dimensions of 750*2000mm, furnished with a cylinder lock with 3keys. Doorframe is made of aluminum, 50mm thick EPS insulation foam. |
| 11 |
Window(W-1) |
PVC, white color, with dimensions of 1200*1200mm, glazed with glass in a thickness of 5mm, two bay fixed, and two bay sliding, supplied with fly screen. |
| 12 |
Window(W-2) |
PVC, white color, with dimensions 500*500mm, glazed with glass in a thickness of 5mm, casement opening, supplied with fly screen. |
| 13 |
Channel |
Galvanized Steel Plain Sheet press moulding Material: Q235. Painted |
| 14 |
Post |
Square steel tube Material: Q235. Painted |
| 15 |
Purline |
Square steel tube Material: Q235. Painted |
| 16 |
Roof truss |
Square steel tube Material: Q235. Painted |
| 17 |
Decoration and connection |
color steel sheet, 0.35mm thickness |
| 18 |
Option |
Decorative floor |
PVC, laminated or ceramic tile |
| 19 |
Drainage system |
Provided plan, design and construction |
| 20 |
Electric system |
Provided plan, design and construction |
| 21 |
Technical parameter |
Bearing load |
30kg/m2 |
| 22 |
Wind pressure: |
0.45KN/M2 |
| 23 |
Fire proof |
B2 grade |
| 24 |
Resistant temperature |
-20 ºC to 50ºC |
Process, fabrication and quality control standard on welding groove/beveling of steel structure
1. Purpose
To ensure the welding quality, meeting up the technical requirements of welded members and improve the standardization of our fabrication, we specially formulate this regulation.
2. Application scope
This manual apply for the design, fabricate and inspection of groove joint in terms of manual arc welding, CO2 arch welding, mixed gas arch welding, submerged arc welding and electroslag welding.
3. Design of welding groove
3.1 Key points on design welding groove:
In order to obtain quality groove, it is necessary to choose appropriate form of groove. The option of groove mainly depends on the thickness of base metal, welding method and craftsmanship requirements.The followings are the factors we need to consider:
- minimize the amount of filler metal
- easy for beveling
- in convenience for welding operation and slag removal
- After welding stress and deformation should be as small as possible
3.2 Groove direction:
We will consider the following factors for the groove direction:
A)in favor of welding process and removing slag and leave enough space for welding process on the fusion face
B)minimize the times of flip-flop during welding
C)way of fit-up in actual welding
3.3. Regulation on groove direction of members:
3.3.1 Butt welding on H section rafter/column (when CJP-complete joint penetration and single side fusion is required)
1) When there is no welding backing, the groove orientation on flange plates should be same and falls on the direction in favor of welding on web plats(same rules apply for the PJP situation). Please refer to illustration 1
2)When there is welding backing, we require the groove direction being outward for the flange plates(opposite direction for web plates) and still falls on the direction in favor of welding on web plates. Please refer to illustration 2
3)Butt-welding on construction site:we require all the grooves should be bevelled on the upper rafter/column when it comes to bolt connection for web plates(see illustration 3). For the scenario of welding on web plates, please refer to the illustration 4.
3.3.2 Box column(groove on itself).See illustration 5
4. Welding groove form
4.1. Mark on form and size of welding joint groove:
Example: Shielded metal arch welding, complete joint penetration, butt welding, I shape groove, welding backing and single side weld would be marked MC-BI-BS1
4.2. For the mark of welding method and penetration type, please see the following chart 1.
Chart 1 Mark on welding method and penetration type
| Mark |
Welding method |
Penetration type |
| MC |
Shielded metal arch welding |
CJP-complete joint penetration |
| MP |
PJP-partial joint penetration |
| GC |
Shielded arch welding
Self-shielded arc welding |
CJP-complete joint penetration |
| GP |
PJP-partial joint penetration |
| SC |
Submerged arc welding |
CJP-complete joint penetration |
| SP |
PJP-partial joint penetration |
| SL |
Electroslag welding |
|
4.3. For the mark of single, double side welding and backing material type, please see the following chart 2
Chart 2 Single/double side welding and backing material type mark
| Backing material type |
Single/double side welding |
| Mark |
Material |
Mark |
Single/double side welding |
| BS |
Metal backing |
1 |
Single side welding |
| BF |
Other backing |
2 |
Double side welding |
4.4. Mark on each part size of groove, see chart 3.
Chart 3 Size mark on groove
| Mark |
Size of each part on groove |
| t |
Thickness of welding plate(mm) |
| b |
Groove root gap or gap between two members(mm) |
| h |
Groove depth(mm) |
| p |
Groove roof face(mm) |
| α |
Groove angle(º) |
Applicable Codes
LATEST INTERNATIONAL CODES COMPLIANCE
A. (GB50009-2012): Load code for the design of building structures
Loads on all buildings are applied in accordance with:
2012 edition of the Load code for the design of building structures
B. (MOHURD): Ministry of Housing and Urban-Rural Development of the People's Republic of China
Manufacturing and Erection tolerances are applied as per:
GB50205-2001 edition Code for acceptance of construction quality of steel structures
C.(MOHURD): Ministry of Housing and Urban-Rural Development of the People's Republic of ChinaHot rolled sections and built up sections are designed in accordance with:
GB50017-2017 Code for design of steel structure
D. CISA - China Iron & Steel Association - Latest Edition
Cold formed members are designed in accordance with:
GB50018-2002 Technical code of cold-formed thin wall steel structures
E. (MOHURD): Ministry of Housing and Urban-Rural Development of the People's Republic of China
Welding is applied in accordance with:
JGJ81-2002 Technical specification for Welding of steel structure of building
F. Surface treatments are applied in accordance with:
GB/T 8923.1 Preparation of steel substrates before application of paints and related products-Visual assessment of surface cleanliness-Part 1: Rust grades and preparation grade of uncoated steel substrates and of steel substrates after overall removal of previous coatings
STRICT DEFLECTION CRITERIA
| Deflection |
Type of structural members |
Deflection Limitation |
| Vertical Deflection |
Portal frame rafter |
Only support corrugated steel sheets roof and cold-formed section purlins |
L/180 |
| If there is ceiling system |
L/240 |
| If there is top running crane |
L/400 |
| Mezzanine floor |
Main beam |
L/400 |
| Secondary beam |
L/250 |
| Purlins |
Only support corrugated steel sheets roof |
L/150 |
| If there is ceiling system |
L/240 |
| Corrugated roof steel sheet |
L/150 |
| Lateral Deflection |
Wall panel |
L/100 |
| Wind columns or wind truss structures |
L/250 |
| Wall beam |
Only support corrugated steel sheet wall |
L/100 |
| Support masonry wall |
L/180 and ≤50mm |
Material Specifications
The material standards for which the building components have been designed as per specifications.
STANDARD MATERIAL SPECIFICATIONS
| Material Specifications |
| No |
Components |
Specifications |
Minimum yield strength |
Applicable Design Code |
| 1 |
Built -up
(Plates) |
GB/T1591-2008 |
Fy = 34.5 kN/cm2 |
CISA - China Iron & Steel Association - Latest Edition |
| 2 |
Hot Rolled |
Angles |
GB/T3274-2007 |
Fy = 23.5 kN/cm2 |
CISA - China Iron & Steel Association - Latest Edition |
Beams |
GB/T11263-2010 |
Fy = 23.5 kN/cm2 |
CISA - China Iron & Steel Association - Latest Edition |
| 3 |
Cold Form
|
Galvanized |
GB/T 2518-2008 |
Fy = 45.0 kN/cm2 |
CISA - China Iron & Steel Association - Latest Edition |
| 4 |
Roof panel/Wall panel
(Zinc) |
GB/T12754-2006 |
Fy = 34.5 kN/cm2 |
CISA - China Iron & Steel Association - Latest Edition |
| 5 |
Roof panel/Wall panel
(Alu) |
GB/T12754-2006 |
Fy = 34.5 kN/cm2 |
CISA - China Iron & Steel Association - Latest Edition |
| 6 |
X-Bracing |
Galvanized cable bracing |
GB/T 700-2006 |
Fu = 157 kN/cm2 |
CISA - China Iron & Steel Association - Latest Edition |
| 7 |
Anchor bolts
|
GB/T 700-2006 |
Fu = 40.0 kN/cm2 |
CISA - China Iron & Steel Association - Latest Edition |
| 8 |
High strength Bolts |
GB/T 1228-2006 |
Ft = 30.3 kN/cm2
Fu = 72 to 83 kN/cm2 |
CISA - China Iron & Steel Association - Latest Edition |
| 9 |
Machine Bolts
|
GB/T 1228-2006 |
Ft = 13.8 kN/cm2
Fu = 41.0 kN/cm2 |
CISA - China Iron & Steel Association - Latest Edition |
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