Open Section (AP-OM)

These kinds of steel sheets are shaped in the form of a trapezoidal object in a way that the lower level of the prepared roof appears serrated.

The sheet in this model is in a form that reduces the consumption of concrete and using steel which eventually decreases the dead load.

Among benefits of the model is performing the secondary beams up to 5.5-meter span without installing the pile. Besides, they can be stored conveniently in a limited space.