H-Shaped Steelhigh-performance thermal insulation, ventilation moisture-proof materials provide extremely high living comforts
difference is not significant. When the roof slope increases, the efficiency of the flexural modulus of z-type purlin
symmetrical in the vertical direction increases. Therefore, Z-purlin is suitable for the roof with a larger slope. For metope,
choosing Z or C does not make much difference. If a purlin is to be made into a continuous member, it is best to Z purlin,
because it is easy to lap.


noise caused by rain and hail obviously. after sandwich is used.












