Bird's Nest Stadium
The Stadium (Bird's Nest) is located in the south of the central area of the Beijing Olympic Park an
Important announcement: Beware of fraud warnings by impersonating our company
Dear customers and partners:
Recently, we have received a number of feedback, there are criminals posing as our name, through mail, phone, SMS and social media and other channels, false publicity, fraud activities, seriously damaged our reputation and the legitimate rights and interests of our customers and partners. To this end, our company issued this announcement to remind the majority of users to be vigilant and beware of being cheated.
First, the characteristics of counterfeit behavior:
Forged identity: Criminals use similar or the same company name, LOGO, website and contact information with our company to forge false identities for fraud.
False information: impersonating our company's brand, forging product certificates and product quality certificates. Impersonating our company personnel for brand product sales and other activities.
Ii. Preventive Measures:
Official verification: For any phone calls, emails, text messages, etc. that claim to be our employees, please be sure to verify through the official channels published on our official website. Never trust information from unfamiliar sources.
Direct contact: If you have any questions or need to verify information, please call our official customer service phone directly, or visit our official website for help.
Iii. Legal Liability:
For any fraud in the name of our company, our company will reserve the right to investigate its legal responsibility, and actively cooperate with the public security organs to investigate and deal with. At the same time, our company also calls on the majority of users to actively report such illegal acts and jointly maintain good social order.
We know that the trust and support of every customer and partner is the cornerstone of our development. Here, we solemnly promise that we will, as always, be committed to providing customers with quality products and services, while strengthening internal management, improving prevention capabilities, to ensure that the legitimate rights and interests of customers and partners are not infringed.
Thank you for your understanding and support! Let us work together to build a safer and more trusted business environment.
I hope this bulletin will be helpful to you!
Tianjin Yuantarun steel pipe Manufacturing Group Co., LTD
2024.7.10
Cooperation Cases & related parameters
丨Changchun Wuhuan Gymnasium (1999)
Changchun Fifth Ring Stadium has a total construction area of 31,200 square meters, which is currently the largest amphibious amphibious stadium in China and Asia. The main structure adopts the main and secondary arch rib grid structure, the long axis span is 192m, the short axis is 146m, and the maximum landing height is 50m. All the bars of the grid structure and arch rib structure are made of cold-formed square rectangular pipes: the main arch chord is 300mm×300mm×12mm, the belly rod is 200mm×150mm×6mm, the secondary arch chord is 300mm×200mm×12mm, and the welding plate is 300mm×20mm; Ring beam arch leg 300mm×200mm×10mm, 200mm×8mm, 200mm×150mm×6mm, a total of 2500t steel.
| Square tube 1 | 300mm×300mm×12mm | Square tube 2 |
200mm×150mm×6mm |
| Square tube 3 |
300mm×200mm×12mm |
Square tube 4 |
300mm×200mm×10mm |
丨Shaoxing International Convention and Exhibition Center
Shaoxing International Convention and Exhibition Center Phase I Area B project is a key project in Zhejiang Province, is the largest investment under construction in Shaoxing City, the largest public construction project, covers an area of 123,800 square meters, the total construction area of about 173,500 square meters, a total of 2,500 booths, mainly by the No. 1 exhibition hall, No. 2 multifunctional exhibition hall, exhibition gallery, conference center and so on. Among them, Exhibition Hall 1 does not have a basement, with a total floor area of 4.8㎡, a building height of 27m, a plane projection size of 80m×112m, consisting of multi-storey auxiliary rooms on the south and north sides, 26,000 m2 single-storey pillarless large exhibition hall, and a giant streamer on the north side, of which the large exhibition hall has a columnless span of 72m and a net height of 16m. And in the 8 axis, 22 axis, 36 axis set up 3 activity partition, to meet the large exhibition hall can be separated and combined flexible operation requirements. The exhibition hall building scheme integrates the continuous and scattered roof elements of Shaoxing Water Town buildings. The roofs of 6 similar units tilt from east to west and are rhythmically staggered. The roof slope is 9.5% and the vertical staggered height is 6m.
The metal roof system in Hall 1 adopts baseplane-purlin separation bearing structure, the baseplate adopts 1.2mm thick steel bearing plate, the perforation rate is 25%, the span is 4.5m, and it is playing on the upper surface of the secondary beam of the steel roof. Structural layers, such as sound absorption, heat preservation, steam insulation and TPO coil, are laid on the bottom plate and supported by the bottom plate. Roof purlins are suspended above the structural layer through purlins, and only support the vertical locking metal roof plate. The standard structure of the metal roof in Hall 1 is shown in the figure above.
| Square tube |
200mm×100mm×6mm |
丨Capital Museum
The New Capital Museum (hereinafter referred to as Shoubo New Museum) is a modern large-scale cultural facility facing the 21st century in Beijing. Shoubo New Museum is located in the southwest of Baiyun Road, Fuxingmen Street, Beijing, with three floors underground and six floors above ground, and a construction area of about 61,800 square meters. It is currently the largest local comprehensive museum building in China and one of the landmark buildings of Beijing in the new century. Shoubo New Museum is a rectangular building plan with a length of 168m from east to west and a depth of 89m from north to south. The roof eaves are 12m on the east, west and south sides, and 21m on the north side facing Chang 'an Avenue. The building is a Class I high-rise building, seismic design class II, fire resistance grade 1, engineering design service life of 100 years.
(1) Steel roof structure In order to minimize the self-weight of the roof structure, the Shoubo new Hall steel roof truss adopts a large number of light rectangular square steel tubes formed by hot process, with a cross-section of 80mm×80 mm ~ 300 mm×300 mm and a wall thickness of 4mm ~ 16mm. The 18 main trusses all use 300mm×300mm hot forming light square steel pipes with wall thickness of 16mm. The upper and lower chord rods of the steel truss are made of rectangular steel tubes with a maximum cross-section size of 300mm×500mm×16mm. The belly rods of the truss are made of double-trough sections. The horizontal and vertical support systems are set between the trusses to strengthen the overall stiffness of the roof.
(2) Steel platform structure The east facade of the Shoubo New Museum is a frame of nearly 2000 square meters (58m×34m) - point-supported glass curtain wall. In order to enhance its overall wind resistance and horizontal seismic resistance, the curtain wall structural support system of steel frame structure is designed on the inside of the curtain wall, which takes into account the horizontal traffic between vertical floors and inside floors. The system has six layers: round steel column material is Q345-B, Φ600×20 welded steel pipe, rectangular steel column material is Q345, the maximum section of 300mm×600mm×20mm, steel beams are welded I-section steel, the maximum section is 700mm×300mm×20mm. The total height of the frame steel column is 34.7m, which is processed and installed in 4 sections. 45 full penetration bevel-butt welds are used between the columns, the upper and lower flange bevelings of the main beam and the end steel leg of the column are welded, the web is connected by high-strength bolts, and the main beam and secondary beam are connected by high-strength bolts of the web. The amount of steel used in the east steel platform of Shoubo is about 800t.
| Square tube 1 |
300mm×600mm×20mm |
Square tube 2 | 700mm×300mm×20mm |
| Square tube 3 | 300mm×500mm×16mm | Square tube 4 | 80mm×80mm×4mm~300mm×300mm×16mm |
丨Terminal T3 of Capital Airport
With a total construction area of about 1 million square meters, Terminal 3 is the largest single terminal in the world so far. Designed to handle 43 million passengers per year, it can dock all types of civil aviation in the world today, including the Airbus A380. Terminal 3 is 2900m long from north to south, 790m wide and 45m high. It is composed of three parts: T3C, T3D and T3E. T3C is located in the far south and is the main part of the terminal. The project uses 150mm×250mm×10mm seamless rectangular pipe 1200t, 450mm×300mm×12mm seamless rectangular pipe 800t, 360mm×360mm×10mm galvanized square pipe 500t, 360mm×360mm×10mm seamless square pipe 800t.
| Square tube 1 |
150mm×250mm×10mm |
Square tube 2 | 450mm×300mm×12mm |
| Square tube 3 | 360mm×360mm×10mm |
丨Zhejiang Haoxite Large Bridge
The main bridge of Haoxi Large Bridge in Lishui, Zhejiang Province is a 208m span butterfly-steel composite bridge. The bridge is constructed with beam first and arch later and cable suspension. The steel arch system consists of main and secondary arch ribs, their connecting rods and wind braces, and the main beam lattice system consists of main longitudinal beams, beams and orthogonal-steel bridge panels. In order to balance the thrust of the steel arch system in the bridge state, the external interchangeable cable tie bar is installed in each main longitudinal beam. Each lifting point is equipped with two galvanized parallel steel wire finished slings, and the upper and lower parts are anchored by fork pin shaft.
In the steel arch system, the height of the subarch rib is 37.5m, the calculated span is 206m, the ratio of the sagittal span is 1/5.493, the arch axis is parabola, and the inclination is 15°. The secondary arch rib adopts rectangular section, 1.5m high, 1.5m wide and 20mm thick. The cross-sectional layout of the main bridge is shown in the figure above.
| Square tube |
1500mm×1500mm×20mm |
丨Macau Mobis Hotel
The project is 154.8m high, a total of 43 floors, the curtain wall area of about 45,000 square meters, its external visual effect is: aluminum clad gradual stress grid skeleton outside, glass curtain wall inside, the middle of the building with smooth curved surface, transition out of three such as jewel like holes. This is the first skyscraper in the world to adopt a free-form exoskeleton grid structure.
| Square tube 1 |
160mm×80mm×12.5mm |
Square tube 2 |
60mm×60mm×4mm |
丨Hangzhou Bay sea Bridge
Hangzhou Bay Cross-sea Bridge is designed as a two-way six-lane highway, with a design speed of 100km/h, a design service life of 100 years, and a total investment of about 11.8 billion yuan. The project uses about 7,000t of galvanised square pipes of 100mm×100mm×2mm, 300mm×300mm×16mm, 70mm×70mm×5mm, accounting for 20% of the steel structure of the whole project.
| Square tube 1 |
100mm×100mm×2mm |
Square tube 2 |
300mm×300mm×16mm |
| Square tube 3 |
70mm×70mm×5mm |
丨Hangzhou Hangxiao high-rise dormitory building
The project is located in Hangxiao steel structure factory, 20 floors above ground, 2 floors underground, construction area of more than 30,000 square meters. Most of the frame columns are cold-formed and high-frequency welded CFST composite columns with a cross-section of 500mm×500mm×12(14)mm, 400mm×400mm×12mm, and the joints are rigid beam-column joints through the transverse partition of the column.
| Square tube 1 |
500mm×500mm×12mm |
Square tube 2 |
500mm×500mm×14mm |
| Square tube 3 |
500mm×500mm×12mm |
丨Wuhan century home residential community
The project is located in the Jiangan District of Wuhan City, consisting of 11 high-rise residential buildings of 14-24 floors, with a total construction area of about 250,000 square meters. The frame columns are mainly cold-formed and high-frequency welded square rectangular steel tubular concrete composite columns, with a cross-section of 380mm×380mm×(8~14)mm, 300mm×400mm×(8~10)mm. The joint is a rigid beam-column connection node through the transverse partition of the column.
| Square tube 1 | 380mm×380mm×(8~14)mm | Square tube 2 | 300mm×400mm×(8~10)mm |
丨Angola housing project
The project department is located in Angola, Africa, all are 15-story high-rise residential buildings. The frame columns are mainly cold-formed and high-frequency welded square tube concrete composite columns, with a cross-section of 400mm×400mm×(14~16)mm, 350mm×350mm×(8~14)mm, and the joints are rigid beam-column connection nodes with through transverse partition of the column.
| Square tube 1 | 400mm×400mm×(14~16)mm | Square tube 2 | 350mm×350mm×(8~14)mm |
丨Xiamen World Overseas Chinese Center
Xiamen Shiqiao Center is located in the old city of Xiamen Lujiang Road, east of West Yingdian Street, south of Xiahe Road, adjacent to the bustling Zhongshan Road commercial street. The planned total construction area of the project (including the basement) is nearly 60,000 square meters, and the initial planning is a 43-story building, with a total investment of about 800 million yuan. The project is characterized by "international, modern, intelligent and low-carbon", which is an international landmark top-level complex building in the central district of the city, integrating 5A Grade A office building, international famous brand center, palace hotel and other multi-functions. The project uses 1100t of 400mm×600mm×14mm galvanized rectangular pipe, 1200t of 250mm×250mm×12mm galvanized square pipe and 500t of 380mm×250mm×12mm rectangular pipe. In addition to the performance advantages held by ordinary square pipes, galvanized square pipes have a stronger protective effect and strong corrosion resistance. The entire structure is made of zinc, forming a dense quadruple junction crystal, which forms a barrier on the steel plate and thus effectively prevents the penetration of corrosion factors. Corrosion resistance The barrier layer from zinc provides strong protection. When zinc is sacrificed for protection in the cut edges, scratches and abrasion parts of the coating, zinc forms an insoluble oxide layer, which acts as a barrier protection.
| Square tube 1 | 400mm×600mm×14mm | Square tube 2 | 250mm×250mm×12mm |
| Square tube 3 | 380mm×250mm×12mm |
丨Zhengda Times Square
Zhengda Times Square is located at the intersection of Jiefang Road and Lishan Road, the main road of Jinan City. With a total construction area of 34,000 square meters, it is an all-around apartment integrating business office, home and investment. The project construction uses 350mm×250mm×14mm low alloy square pipe 1100t, 300mm×300mm×16mm galvanized square pipe 500t, 250mm×200mm×10mm low alloy rectangular pipe 1200t, accounting for 20% of the entire steel structure engineering pipe volume.
| Square tube 1 | 350mm×250mm×14mm | Square tube 2 | 350mm×250mm×16mm |
| Square tube 3 | 350mm×250mm×10mm |
丨All cold formed Steel roof structure of Baotou Steel's large rail and Beam Workshop (1966)
The workshop area of 8800 square meters, the use of cold formed steel roof. The roof structure is composed of 30m span roof frame, 12m span skylight frame, windscreen frame, support and bracket. The roof plate is galvanized corrugated plate. The roof truss, skylight frame, air baffle, and support are all cold-formed thin-walled square steel pipes or C-shaped steel or Z-shaped steel. The main pipe sections are 160mm x 4mm, 140mm x 120mm x 3mm, 120mm x 100mm x 3mm. 12m bracket member adopts hot-rolled Angle steel. An on-site inspection carried out in 1996 (30 years after completion) found that the roof was structurally in good condition.
| Square tube 1 |
140mm×120mm×3mm |
Square tube 2 |
120mm×100mm×3mm |
丨Cold-formed section Workshop of Wuhan Steel Rolling Mill (1993)
The workshop is 30m two-span, column distance is 6m, each span is set up 20t intermediate working crane. The steel roof structure is composed of 30m anti-trapezoidal roof truss, 12m trapezoidal skylight frame, purlins and supports. Structural rods and purlins are made of cold-formed thin-walled rectangular steel pipes (welded from cold-formed C-type steel) and C-shaped steel, the main specifications of welded square rectangular pipes are 180mm×120mm×4.5mm, 160mm×100mm×4.5mm, 120mm×100mm×4.5mm and 100mm×100mm×4.5mm. Single weight of roof truss 2.6t. The plant structure was built in 1993 and has been in good condition ever since.
| Square tube 1 | 180mm×120mm×4.5mm | Square tube 2 | 120mm×100mm×3mm |
| Square tube 3 | 120mm×100mm×4.5mm | Square tube 4 | 100mm×100mm×4.5mm |
丨Cold-formed square (rectangular) tubular roof truss used in the third phase of Baosteel project (1995)
The roof truss of the pilot project is 24m trapezoidal roof truss, and the rods are made of domestic cold-formed square (rectangular) steel pipe, and the material is SM50B steel. The upper chord section is 150mm×150mm×4mm, the lower chord section is 120mm×80mm×4mm, the belly rod is 120mm×80mm×4mm, 80mm×80mm×4mm, 60mm×60mm×4mm. The theoretical steel used for the roof truss is 1.26t, which saves about 40% of steel compared with the traditional Angle steel roof truss. The production time can be reduced by 16% and the cost can be saved by about 20%.
| Square tube 1 | 150mm×150mm×4mm | Square tube 2 | 120mm×80mm×4mm |
| Square tube 3 | 80mm×80mm×4mm | Square tube 4 | 60mm×60mm×4mm |
丨Shaogang tower system structure of big converter project
The tower system structure of the big converter project of Shaogang is a load-bearing steel structure, with a height of 59m, including 14 layers of steel platforms, with a total weight of more than 5400 t. The main structural form of the member is box-shaped structure, including 6 box-shaped beams, 6 box-shaped columns and so on. The project uses 400mm×600mm×14mm seamless rectangular tube 500t, 350mm×350mm×12mm seamless rectangular tube 1200t, and 300mm×300mm×16mm seamless square tube 800t.
| Square tube 1 | 400mm×600mm×14mm | Square tube 2 | 350mm×350mm×12mm |
| Square tube 3 | 300mm×300mm×16mm |
丨Suzhou Zhoushi residential project "three board" structural stairs
With the increasing use of prefabricated "three-panel" structure, the prefabricated stair board is generally hoisted behind the first floor of the structure, so a side hole is formed in the stair part, and the operation frame for the construction of the protection frame and wall panel is set up. The steel pipe fastening system or disc fastening system is used directly to set up the frame body. After the construction of this floor is completed, all stairs should be removed before hoisting. After the hoisting of the stair board is completed, it needs to be set up again on the upper floor. This construction method is slow, low efficiency and high labor cost. The construction technology of the operation platform in the stair part of the three-panel structure can not only effectively protect the stair entrance and improve the construction safety, but also be used as the operation frame for the construction of the upper wall panel and reduce the cost.
The construction technology uses 60mm×40mm×3mm square steel pipe as the frame support, the platform part uses 50mm×40mm×2.5mm square steel pipe @300 as the cross bar, the surface layer is laid with 15mm thick plywood, and the square pipe is firmly fixed by using self-tapping screws. The size of the frame is slightly smaller than the size of the hole, which is convenient for the transport of the tower crane. The erection height is 1.2m above the building level. When hoisting the stair board, use the tower crane to lift the operating platform to the upper floor. After the stair board is installed, lift it back to the stair opening again. This method not only can effectively achieve the protective effect of the stair entrance, but also can be used as an operating platform during the construction of wall panels. In high-rise construction, only one floor of the operation platform can be used repeatedly until the main structure is completed. The construction speed is faster, the efficiency is improved, and the reuse effectively reduces the labor cost. The schematic diagram of the prefabricated operation platform is shown in the figure above.
| Square tube 1 | 60mm×40mm×3mm | Square tube 2 | 50mm×40mm×2.5mm |
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