Durable GRC and GRG systems engineered for a tunnel to enhance mobility
Location
Makkah
Sector
Tunnel
Year
2025
Key Quantities
5500m²
Scope
GRC/GRG
The Jabal Omar underpass form a critical component of the broader Masar urban development in Makkah, an area that supports the continuous movement of visitors entering the holy city. Our scope focused on delivering a complete architectural package for the underpass corridors and lobby interfaces, incorporating GRC cladding for large exterior transitions and GRG elements throughout the interior spaces.
The works required consistent alignment with Masar’s design standards while maintaining strict control over installation quality in zones that experience heavy day-to-day footfall and constant operational oversight.
Challenges
Several site and installation conditions required a controlled and technical approach:
Continuous pedestrian and vehicle movement required controlled installation windows coordinated with city access regulations.
Long-span GRG and exterior GRC elements demanded precise moulding, alignment, and consistent finishing across large surfaces.
Limited staging areas required steady material turnover without obstructing active circulation zones.

Our Solutions
Technical Approach
- Engineered GRC and GRG elements with precise molding and finishing to achieve consistent surfaces and long-span transitions.
- Applied accurate setting-out and alignment controls across extended wall lengths and intersecting architectural lines.
- Maintained strict inspection and quality protocols to ensure durability, uniform finishes, and full compliance with Masar standards.
Execution
Scheduled deliveries and phased installations to maintain progress without disrupting active pedestrian or traffic flow.
Coordinated daily with the main contractor and city authorities to align access routes, work windows, and installation clearances.
Executed precise finishing works to achieve a cohesive architectural result befitting a prominent urban gateway.
