Structure and Features of Fully Automatic Glass Roofs
Fully automatic glass roofs are widely used in modern buildings, from civil structures to industrial plants, from public corridors to shared spaces in large commercial buildings. When natural light is needed from above, illuminating the roof is the natural choice. In recent years, as energy efficiency and environmental protection have gained importance, natural daylighting has been widely applied in architectural design.
With advances in construction technology and new building materials, structural forms and materials for fully automatic glass roofs have become increasingly diverse, and skylight shapes more artistic—from simple squares, rectangles, and circles to saddle shapes, ellipsoids, irregular curved surfaces, and three-dimensional folded forms.
Point-supported fully automatic glass roofs are named for how glass panels are supported—all panel loads transfer through individual support points to the support structure. In service, the support structure bears loads from each point. As long as the structure has sufficient strength without excessive deformation, the design is viable. Many support structures exist in practice; architects can choose the best fit for style and environment. Common support types include:
1) Steel structure support: steel truss, steel space frame, steel beam, steel arch, etc.
2) Cable structure support: fish-belly cable truss, spoke cable structure, saddle cable structure, tensioned beam-arch, spatial cable net, single-layer cable net, etc.
3) Glass beam support: steel-glass composite, cable-glass composite, glass composite with other materials, etc.
Architectural design of fully automatic glass roofs is carried out by design-institute architects and curtain wall manufacturers. The institute selects the skylight, determines main form, panel division, materials and performance, support method, and support structure type and layout; the manufacturer then refines requirements for detailed and construction drawing design. This generally includes:
1) Performance requirements: wind resistance, air tightness, water tightness, and national energy standards for insulation, thermal performance, and shading;
2) Smoke exhaust design: natural ventilation and smoke exhaust when height ≤ 12 m; mechanical smoke exhaust when > 12 m;
3) Drainage design: drainage scheme, channels, and appropriate roof slope;
4) Lightning protection: independent systems unless surrounding buildings provide protection;
5) Fire protection: fire layers on steel supports or sprinkler accessories; 6) Safety: appropriate panel materials and connection design to prevent panel fall injuries.
7) Shading design for fully automatic glass roofs: awnings and canopies; manual, electric, or intelligent control systems.
