Those materials are cold-formed steel z represents what

Wherein A, B, C, D, E representative of the impact of temperature is not the same. A representation is not to shock B indicates temperature of 20 degrees C, said the impact of the impact of D 0 degrees -20 degrees, says the impact of E represents the impact of -40 degrees. Q represents what does that mean? In fact, the yield value of Q represents the cold-formed steel, and behind the back of the Q value represents the lower limit of the yield strength and yield strength of this unit is MPa, and the yield value of cold-formed steel will increase and decrease the thickness of the material small, that is, the yield value and the thickness of the material is inversely proportional to 

Specifications from 50mm-350mm, materials are Q195-Q235B or Q345B material, installation thickness 1.5mm-3.5mm, can be customized according to customer needs galvanized cold-formed steel, cold-formed steel purlins lap, widely used in steel plant .