The components which make up this structural system are:

 Purlings.
 Frames.
 Front ends or lintels.
 Bracing.
 Anchorage.
 Roof.

 Skylights:

Skylighting is distributed on the roof planes in lengthways strips (parallel to the ridge) or crosswise strips (perpendicular to the ridge).
The first system is recommended for fibre cement roofs and the latter for roofs made of other materials. Unless otherwise indicated, the surface percentage taken up by skylighting ranges from 10% to 15%. The great majority of the materials currently available on the market can be coupled to the roof: glass fibre-reinforced polyester, compact or cellular polycarbonate, PVC, etc.

 Gutters.
 Heat insulation.
 False ceiling.