What is the difference between C-shaped steel and Z-shaped steel?

For C-shaped steel and Z-shaped steel, many people think that except for the different models, most of them are the same, especially when we choose materials for the wall, both can be used. In fact, there is a big difference between C-shaped steel and Z-shaped steel.

1. From the appearance, the angles of Z-shaped steel purlins and C-shaped steel purlins are different. The C-shaped steel purlins are 90 degrees, while the Z-shaped steel purlins are less than 90 degrees, roughly 60 to 75 degrees. Therefore, when purlins are used on roofs with a certain slope, It is necessary to consider the angle of the purlins based on the knowledge of stress. The Z-shape can be used to make full use of its bending resistance when the slope is large.

2. If the purlins are to be made into continuous components, Z-shaped steel purlins should be chosen over C-shaped steel purlins because the overlap of Z-shaped steel purlins is more convenient.

3. From the perspective of bending resistance, when the roof slope is small, the bending section modulus of Z-shaped steel purlins is slightly larger than that of C-type purlins, but the difference is not big; when the roof slope increases, the bending resistance of Z-shaped steel purlins in the vertical direction is The section modulus utilization rate increases, so Z-shaped steel purlins are suitable for roofs with larger slopes;

4. From the cross-section point of view, the mechanical properties of the strong and weak axes of C-shaped steel and Z-shaped steel are quite different, and the connection with the steel frame is mostly bolted. When calculating, it needs to be considered as simply supported, while the Z-shaped section can be Reliable overlap realizes the connection, which can be calculated as a continuous beam. Therefore, from the perspective of stress state, calculation results and structure, the Z type is more reasonable. Therefore, in addition to processing door and window openings and other special processing needs, Z-shaped steel is still the first choice. During the entire steel structure processing process, C-shaped steel can be used for wall purlins and roof purlins with a small shelving slope. Z-shaped steel purlins are suitable for roof purlins with a large shelving slope, so that the roof load force can be reduced through the Z-shaped purlin section.