Project Introduction:
Site:Peru
Designor&contractor:KXD
Size:10.3m*11.45*6.5m(2 floors)
Interior layout:2 apartments in total.
Ground floor:kitchen,dining room,small bathroom,living room
First floor:3 bedrooms+bathroom
Technical datas of Peru steel frame structure residential Building Construction
I.Main frame
The main frame includes the column and mezzanine girder/beam.The column is Q235, rectangular hollow section and mezzanine beam is Q235, hot-rolling H section steel.
II.Flooring system:
| Decking floor |
688 type,1mm |
| Mudguard sheet |
2mm galvanized bending |
| Stud |
φ16 |
The floor systems are covered:
- Composite beams and composite slabs with steel decking
- Long-span composite beams often with service openings
- Cellular composite beams with composite slabs and steel decking
- Integrated beams with precast concrete units
- Composite and non-composite beams with precast concrete units.
III.Wall panels
About the wall panel,we recommend the cement foam panel.
Advantages of structural steel system for the residential building:
Structural steel framing has long been recognized as a high-strength, dimensionally predictable, rapidly erected framing material. The selection of a structural steel framing system for a multi-story residential project provides significant benefits to the project, including:
- Low floor-to-floor heights and maximized floor-to-ceiling heights using steel framing elements and thin-floor systems
- Flexible spaces thanks to column-free areas-ideal for amenities and a mixture of unit types (link to space utilization page)
- Enhanced framing quality through the use of a long-lasting, durable, high-quality material fabricated off-site to tight tolerances (Quality page link)
- Adaptiveness, as a steel framing system is simpler to expand or remodel (Adaptability page link)
- Reduced foundation loads, column footprint and overall project costs thanks to steel's lightweight properties (Comparison of other material link)
- Earlier building occupancy thanks to quick erection, which reduces overall on-site construction, labor and associated time and costs (link to Schedule page)
Structural steel framing systems are competitive with alternative framing materials -- with the "sweet spot" for buildings five stories and above. Explore the following Multifamily framing concepts to find the best solution for your next project.
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) |
Specs charts
| 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 |
| Offer request |
| Type of Building |
|
| Please state type of building, ie: workshop, warehouse, hall, hangar, farm, roof structure or other construction |
| Dimension |
a(width) |
b(length) |
h1(wall height) |
h2(total height) |
|
|
|
|
| Construction Site |
|
| Roofing and Walls |
(1)sandwich panel
(2)profile steel sheets
(3)steel sheet+glasswool blanket
(4) no walls-only roof with structures |
| Contact Name |
|
| Company Name |
|
| Phone Number |
|
| Email |
|
| Additional info |
|
| Send us sketches, drawings or the project, if you have |
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 China Hot 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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