Expansion of Holy Mosque in Mecca, Saudi Arabia

Customer Project

The Holy Mosque in Mecca is the most important and the biggest Islam mosque in the world. An additional floor has been built in the interior around the main sanctuary of the Kaaba. The project's name is ’Mataf Extension‘.

Structural Engineering Ing.-Büro Mauss
Düsseldorf, Germany
Construction Main Contractor
Saudi Binladin Group (SBG)
Jeddah, Saudi Arabia
Investor GHI Formwork LLC
Dubai, United Arab Emirates


It is a reinforced concrete construction with a floor span of 49 ft and dimensions of the main beams are h / w = 7.2 ft / 11.8 ft with a span of 75.5 ft.

Supporting Structure Made of Steel Trusses

To allow the use of the surfaces below the new floor during construction, wide‑span steel structure supporting girders instead of conventional scaffolding were used to support the shell structure.

The beams were designed as spatial trusses and were designed for the weight of the fresh concrete of the main and secondary floor beams. Dimensions of the steel beams are h / w = 11 ft / 8 ft with a total length of up to 184 ft. They were created and designed by the engineering office Mauss using RFEM.

A substantial amount of work was due to the changes during the approval and assembly phases which were carried out under enormous time pressure.

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  • Updated 30 September 2020

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