Nigeria Sahara SOIE UNILAG School Building Shell Roof Space Frames
Nigeria Sahara SOIE UNI
Nigeria Sahara SOIE UNILAG School Building Shell Roof Space Frames
Elliptical Semi-Cylindrical Bolt-Ball Space Frame Project Profile
Located at University of Lagos (UNILAG), Akoka, Lagos, Nigeria, the Sahara School of Innovation and Extrapreneurship (SOIE) features a landmark elliptical semi-cylindrical shell roof adopting professional bolt-ball joint steel tube space frame technology. As a high-end commercial and education complex building, the project integrates reinforced concrete substructure and steel space frame superstructure, creating a composite structural system of lower RC frame + upper steel space frame canopy, which becomes a iconic architectural landmark for innovation incubation, entrepreneurship training, data science, artificial intelligence, fintech and digital culture research in West Africa.
Overall Structural Geometry & Key Dimensions
The space frame covers the entire building roof and two curved side walls, presenting a perfect semi-elliptical cylindrical curved surface design.
Roof:Shell Roof Space Frame, Standing Seam Roof, Solar PV Power Generation Plant
Siding: Brise Soleil Panel, PVDF Aluminium Facade
Endwall: Roof Fascia, Aluminium Alloy Fin Facade with wire meshes;
Clear span width: 34mRise height: 18m
Longitudinal total length: 56m
Elliptical semi-axes: a=17m, b=18m
Horizontal projected area: 1,904 m²
Developed curved surface area: approximately 3,781 m²
Total steel structure weight: 130–150 tonnes
Design service life: 50 years
Structural safety grade: Class II
Seismic design standard: 7-degree seismic intensity (0.10g)
Adopting square-on-square pyramid curved space frame layout with typical top chord grid size 1.5m×3.6m and frame layer height around 1.1m, the structure adopts perimeter support mode, fixed on RC beam and column via embedded steel plates, with installation height ranging from ±0m at the lowest point to 18m at the crown.
Material Specification & International Standard Compliance
All structural design, material selection and construction strictly comply with Chinese national standards: GB 50017-2017, JGJ 7-2010, GB 50205-2020, GB/T 16939-2016.
Steel Tube Members
Main load-bearing chords and web members adopt Q355B seamless steel tubes complying with GB/T 8162-2018, specification Φ60.3×3.5mm and Φ75.5×3.75mm; secondary structural members adopt Q235B carbon steel. Premium raw material brands including Ansteel, Baosteel and Hualing are applied to guarantee structural durability and load-bearing performance.
Bolt-Ball Joint System
Standard 45# steel quenched and tempered bolt balls (HB 241–286) in three specifications for chord nodes, web concentration nodes and support nodes, matched with Grade 10.9 high-strength bolts (M16/M20/M22/M24), cone heads and end plates, fully implemented per GB/T 16939-2016. Total sets of high-strength fasteners reach 15,000–18,000 sets.
Envelope & Auxiliary System
The roof is equipped with standing seam roof panel, Mansafe safety system and solar panel power generation system; curved side walls adopt brise soleil louver panels. Endwall facade applies 500×125×2.5mm aluminium alloy rectangular hollow section with 3-layer PVDF coating (RAL 7004), achieving 20 years of service life. Cold-formed purlins in C120, C140 and □100×50 specifications are arranged at 2.4m transverse spacing and 1.5m longitudinal spacing for secondary structural support.
Anti-Corrosion & Protection System
Factory prefabricated three-coat anti-corrosion system: epoxy zinc-rich primer ≥60μm DFT, epoxy micaceous iron intermediate coat ≥80μm DFT, two-component polyurethane topcoat ≥60μm DFT. Steel shot blasting treatment and special anti-rust grease for bolt-ball interior ensure long-term corrosion resistance in tropical coastal climate of Lagos. Fire-retardant coating is exempted due to overhead installation height away from ground floors.
RC Ancillary Structure & Construction Standard
The whole construction follows GB 50755-2012 steel structure construction code, JGJ 80-2016 high-altitude safety standard and relevant hoisting and fire safety codes, implementing standardized construction organization design for large span curved space frame installation.
Project Advantages & Application Value
We provide one-stop integrated services including space frame structural design, material customization, prefabrication, on-site installation and technical consultation, delivering high-standard steel space frame solutions for overseas large-span architectural projects.
Core Keywords: Nigeria Sahara School, UNILAG Akoka, SOIE Innovation Campus, Elliptical Semi-Cylindrical Space Frame, Bolt-Ball Joint Steel Structure, Shell Roof Space Frame, Standing Seam Roof, Brise Soleil Panel, PVDF Aluminium Facade, Large Span Steel Space Frame
Why ZHM Huawu Metal School Building Shell Roof Space Frames ?
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| Reliable and Customized Designs | Cutting Edge Designing Process | Free Online Price System | Easy Bolt-by-number Assembly |
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| Over Two Decades of Experience | Value For Money | Unmatched in Quality and Craftmanship | Excellent Customer Service |
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