General Information
Figure 1 shows a freestanding carport.
![Freestanding carport with triangular space trusses and suspension rods](parking-lot-structures/structure-7/1-carport.jpg)
Triangular Space Truss
Figure 2 shows the carport.
![Freestanding carport with triangular space trusses and suspension rods](parking-lot-structures/structure-7/2-carport.jpg)
The carport is made of a reinforced concrete structure and a steel structure: the former consists of a frame made of columns, transverse beams, and longitudinal beams; the latter, of triangular space trusses (made of circular hollow profiles), suspension rods, purlins, roof braces, and metal roofing sheets. Figure 3 shows a schematic partial three-dimensional view of the carport.
![Three-dimensional drawing of a carport with triangular space trusses and suspension rods](parking-lot-structures/structure-7/3-3d-view.jpg)
The triangular space truss length s ≅ 5 m, and the distance between the columns d ≅ 4 m. The suspension rods are connected to the mid-length of the trusses and the RC longitudinal beam. Figure 4 shows a carport sector viewed from below.
![Triangular space trusses of a freestanding carport](parking-lot-structures/structure-7/4-carport-space-trusses.jpg)
The triangular space truss has a bottom and two upper chords (inverted triangle), verticals, and diagonals. The back-end connection is pinned and located on the bottom chord's axis.
What are some possible reasons for using the above shown triangular steel space trusses?
Roof Bracing
Figure 5 shows a roof sector viewed from below.
![Roof bracing of a carport with triangular space trusses and suspension rods](parking-lot-structures/structure-7/5-bracing.jpg)
The roof bracing consists of horizontal cross braces made of steel tension rods with bent ends; they are placed along the entire roof and connected to the front and back ends of the bottom chords by plates, as shown in figure 6.