The solver of the large column distance problem:

With the continuous improvement of the owner’s requirements for space utilization, to meet the production needs of various industries, the column spacing has been expanded from the previous 6~9m to the current 12m and above. For the column spacing of 12m and above, ordinary purlins can no longer meet the requirements. , The truss-type purlin can easily solve the problem and solve the problem for the owner.
GB51022-2015 [Technical Specification for Steel Structures for Lightweight Portal Framed Buildings] Chapter 9, Purlin and Wall Beam Design 9.1.1 clearly states that "truss-type components should be used for simply supported purlins with a span greater than 9m".


Customized service:

Truss-type purlins can be customized according to the height, span, load-bearing capacity and customer needs. RK series steel trusses have up to 96 models in the standard load table for customers to choose from, but not limited to this; truss-type purlins allow pipes , Bridge, and electrical pipes pass through the structure.



Advanced hanging system:

Due to the special structure of the Peterson truss with an advanced hanging system, the hanging problem can be easily realized without welding or drilling. And in the early stage of the design, you can reserve the position in advance, and the hanging position can be moved at will, saving the amount of renovation.


Save total project cost:

Peterson steel trusses can save the total project cost by saving steel consumption and advanced hanging system. At the same time, the company continues to study new truss connection modes, so as to reduce costs and improve product core competitiveness. The owner can choose different connection methods for use according to their needs.


Replacement of C/Z Purlin:


Comparison table of technical and economic analysis of steel truss purlins and 

cold-formed thin-walled Z purlins - general working conditions

Steel truss purlin

Z-shaped purlin

Steel truss purlin

Z-shaped purlin

Bay Spacing

12m

Spacing

1500mm

1500mm

1500mm

1500mm

Bay Spacing

PSJ-R500K01

XZ300*80*25*2.3/3.0

PSJ-R600K02

XZ300*85*25*2.8/3.3

Material

Q420

Q345B

Q420

Q345B

Normal load

Dead load:0.2KN/Live load:0.5KN/Wind load:0.3KN/
Snow load:0.2KN/Suspended load:0.15KN/

Dead load:0.2KN/Live load:0.5KN/Wind load:0.35KN/
Snow load:0.6KN/Photovoltaic:0.2KN/Suspended load:0.15KN/

Steel consumption for linear meters

8.366kg/m

10.373kg/m

9.63kg/m

13.048kg/m

Steel consumption per square meter

5.577kg/m*m

6.915kg/m*m

6.42kg/m*m

8.699kg/m*m

Conclusion

For the roof system with 12m column spacing, 
under the same load requirements, 
the use of Peterson purlins can save up to 19% of the steel 
consumption than the cold-formed thin-walled C.Z purlins.

For a roof system with a column spacing of 12m,
under the same load requirements,
the use of Peterson purlins can save up to 26% of the steel
consumption compared to the use of cold-formed thin-walled C.Z purlins.



Comparison of technical and economic analysis of steel truss purlins and 

 cold-formed thin-walled Z purlins - main line conditions

Steel truss purlin

Z-shaped purlin

Steel truss purlin

Z-shaped purlin

Bay Spacing

12m

Spacing

1500mm

1500mm

1500mm

1500mm

Bay Spacing

PSJ-R500K02

(2)XZ300*80*25*2.0/2.3

PSJ-R600K03

(2)XZ300*85*25*2.3/2.8

Material

Q420

Q345B

Q420

Q345B

Load requirements

Dead load:0.2KN/Live load:0.5KN/Wind load:0.3KN/
Snow load:0.2KN/Suspended load:0.15KN/

Dead load:0.2KN/Live load:0.5KN/Wind load:0.35KN/
Snow load:0.6KN/Photovoltaic:0.2KN/Suspended load:0.15KN/

Special load

Main line load:180kg/m

Main line load:240kg/m

Steel consumption for linear meters

9.26kg/m

17.742kg/m

10.62kg/m

21.826kg/m

Steel consumption per square meter

6.173kg/m*m

11.828kg/m*m

7.08kg/m*m

14.551kg/m*m

Conclusion

For main line hanging, the special suspension system 
of Peterson steel truss purlin can save 48% of steel. 
And in the installation of mechanical and electrical 
equipment in the process of eliminating the traditional 
installation process of the necessary air welding and drilling.
For main line hanging, Z-purlins must be suspended by 4 purlins, 
and special suspension system of Peterson steel truss purlins is used. 
Only 2 purlins are suspended, saving 51% of steel. 
And in the installation of mechanical and electrical 
equipment in the process of eliminating the traditional 
installation process of the necessary air welding and drilling.



Replacement Of High Frequency Welding Purlin:


Technical and economic analysis comparison table of steel truss purlin and 
high frequency welded H-shaped steel purlin

Steel truss purlin

High frequency welding H-shaped rigid purlin

Steel truss purlin

High frequency welding H-shaped rigid purlin

Column distance

12m

15m

Spacing

1500mm

1500mm

1500mm

1500mm

Section size

PSJ-R500K01

H350*150*3.2*4.5

PSJ-R650K02

H350*150*4.5*6

Material

Q420

Q345

Q420

Q345

Load

Dead load: 0.2KN/; Live load: 0.5KN/; Wind load: 0.45KN/;

Snow load: 0.45KN/;Suspension load: 0.3KN/

Steel consumption for linear meters

8.366kg/m

17.91kg/m

9.82kg/m

24.3kg/m

Steel consumption per square meter

5.577kg/m*m

11.94kg/m*m

6.547kg/m*m

16.2kg/m*m

Expanded area (m*m)

11.3

15.6

14.6

19.5

In conclusion

For the roof system with 12m column spacing,

The use of Peterson steel truss purlins saves up to 53% 
of the steel consumption compared to the use of high-frequency 
welded H-shaped steel purlins

For the roof system with 15m column spacing,

The use of Peterson steel truss purlins saves up to 60% of the 
steel consumption than the use of high-frequency welded H-shaped steel purlins

It can be seen from the above data that under the same load, the higher the column spacing requirement, 
the greater the saving of steel by using Peterson steel truss.

At the same time, it can save more than 25% of the fireproof coating area and more 
than 30% of the engineering cost of the roof substructure;

Because the Peterson hollow steel truss purlin system has a special suspension system,

it saves the air welding and drilling necessary for traditional installation during the electromechanical equipment

installation process, thereby saving more than 30% of the labor cost of the electromechanical contractor.


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