General Information
Figure 1 shows a steel canopy roof.
![Steel canopy roof with four suspension rods.](canopy-roofs/structure-6/1-canopy-roof.jpg)
Arrangement of Suspension Rods
Figure 2 shows the canopy roof viewed from below.
![Steel canopy roof structure viewed from below.](canopy-roofs/structure-6/2-canopy-roof.jpg)
The roof structure consists mainly of transverse beams, a longitudinal front beam, four suspension rods (placed in pairs), purlins, and metal roofing sheets. The longitudinal and transverse beams are made of rectangular hollow sections, while the purlins and the suspension rods are made of square hollow sections. The transverse beams are connected to the RC balcony structure and the longitudinal front beam.
A suspension rod pair consists of a front (f) and a back (b) rod. The former are welded at the ends of the longitudinal front beam, while the latter are welded at the ends of a purlin. The back (building) connection of each rod pair (f and b) is located on an external RC column. Figure 3 shows a schematic three-dimensional view of the structure.
![Three-dimensional drawing of a steel canopy roof with four suspension rods.](canopy-roofs/structure-6/3-3d-view.jpg)
A transverse beam has a length of t ≅ 3 m, and a longitudinal beam has a length of l ≅ 8 m.