Q345B light steel construction design prefabricated workshop large span steel structure warehouse

Who Are We ?

  Thank you for your interest in Henan CangLong Steel Structures co,.ltd ,  We are a family owned business and have been in operation since 2007, who is specializing in post frame steel buildings. Our individually engineered permanent structures are the best choice for customers requiring speed of construction and economy coupled with aesthetic value. Our buildings are ideal for residential, commercial , agricultural ,industrial and chemical factories ,warehouses & stores , hospitals & clinics,multi-storey buildings , supermarkets ..

Why is CangLong Steel Structures the Right Choice?

  Your investment is an important decision and should be realized through a financially stable company.  Our deep community roots and stout economic strength gives us an exceptional advantage in hiring experienced professionals who will complete your project to your expectations.

The Edge

 Competitive Prices Our production capacity (approximately 20000 metric tons annually) together with effective

 and economic engineering and manufacturing methods enable us to offer the most competitive prices in the industry.

Fast Quotations

 Quotations for simple buildings can be submitted quickly due to vast experience of our staff and the advanced 

software we use.

Fast Delivery 

 (1)We are able to design, detail, fabricate and supply simple buildings in approximately 4 weeks. 
 (2)Most of our buildings are delivered and erected within 8 weeks (this relies on various factors such as stock 

position, weather etc).
Site Supervision 

  (1)A site supervisor is always present at site to ensure that work is being carried out satisfactorily.
  (2)Any problems that arise are quickly dealt with to minimise any delays. 
  (3)Safety on site is also made a priority.

1. Strictly control the welding position of the relative position of size , welding pass behind the prospective;

2. Reasonablly selection of welding parameters and order to prevent crack;

3. Electrode required drying, welding area need to clean up, welding process, together with the appropriate welding current, decrease of welding speed, gas completely escape , prevent the formation of weld porosity;

4. When continuously multi-layer welding, each weld layer after cleaning, prevent the formation of slag;

5. Selection for current, avoid arc pull too long, control electrode angle and arc method, avoid the generation of undercut.

Attached: welding process parameters

welding process parameters

"Steel Design Code" (GB50017-2003)

 "Cold-formed steel structure technical specifications" (GB50018-2002)

 "Construction Quality Acceptance of Steel" (GB50205-2001)

 "Technical Specification for welded steel structure" (JGJ81-2002, J218-2002)

 "Technical Specification for Steel Structures of Tall Buildings" (JGJ99-9)

We often use Ultrasonic detector ,X-ray detector , Paint film thickness gauge to check steel frame .

1.Steel structure welding requirements

Engaged in welding of steel structure work welders must pass the examination and obtain a certificate. The holder welder must welding in its passing the examination and approval within the scope of the project.

2.Fastener connection requirements

1. Common type of the industrial building?

Reply: Portal frame is the usual type in the industrial workshop and warehouse shed. Other types also could be designed and manufacturer as per clients’ request.

2. What’s the quality grade of the steel structure components?

Reply: Q345 is used for main steel structure, Q235 is used for secondary steel structure. 
3. How about the delivery time?
Reply: Usually,within 25-30 days after the order confirmed, also depends on the fabrication quantity.
4. How about the derust grade?
Reply: Ball blasting Sa2.5 on main steel structure; 
manual derust St2.0 on secondary steel structure.
5. What is kind panel used for the roof and wall?
Reply: Color corrugated steel sheet and sandwich panel could be used. Sandwich panel performs well on the heat insulation,sound insulation.Common sandwich materials are EPS, glass wool and PU.
6. How to install it?

Reply: We will furnish you the detailed construction drawing and the construction manual which could help you to erect and install the building step by step. We also could send the engineer to your local to help you if neede

7. Maintenance:

Reply: Finish paint need be done after the frame installed, and do it again after 6-8 months. So the surface will stay more time.

   Welcome you to ask our company questions and we would like to supply best service for you !

   Contact ways : Ada Gao (Female) , Tel/Whatsapp/Viber: +86 15981850388