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The roof space frame type of the university library is bolted ball joints and is placed in a square pyramid; the supporting form: multi-point support around the lower chord.
The canopy for the grandstand of the large stadium is crescent-shaped on the plane, 183.5m long, 39.6m wide at the widest point, with a maximum cantilever of 30.0m, fan-shaped laterally, and a sagittal height of 24m.
The application of inclined trusses has altered the unidirectional load characteristics of ultra-large-span maintenance hangar roofs, enhancing the spatial load-carrying capacity of the roof and effectively reducing the burden on the door-side trusses, making the construction of large-span maintenance hangars in extremely low height restriction areas feasible.
According to the layout characteristics of the roof steel truss structure system, the construction technology of "hydraulic synchronous push and slip" is proposed to adopt the installation method of bidirectional rotation and cumulative slip.
To construct a single-layer grid shell system that meets structural safety requirements, multiple factors must be considered. When designing a single-layer grid shell based on the petal profile, the cross-sectional dimensions of the members must be relatively large to ensure structural safety. This is due to the significant reaction forces at the supports of the grid shell, which necessitate additional reinforcement of the main structure. To address this, vertical struts are added below the petal beam nodes to act as supports, which reduces the span of the main beams and thereby decreases the cross-sectional dimensions of the grid shell components.
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