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Old August 13th, 2013, 03:37 AM   #11921
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the army of cranes...
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Old August 14th, 2013, 06:12 PM   #11922
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Makkah Clock


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Old August 14th, 2013, 11:26 PM   #11923
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Who would actually buy that?
Come on, you know you want one.
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Old August 15th, 2013, 12:32 AM   #11924
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Is this edifice really 600m high ? Looks less than.

Ist dieses Bauwerk wirklich 600m hoch ? Sieht kleiner aus, gerade auch im Vergleich mit der Umgebung.
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Old August 15th, 2013, 01:22 AM   #11925
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The spire on top pushes it to 600 meters.
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Old August 19th, 2013, 09:42 PM   #11926
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This is a big monstrosity. How could they built this so close to such a special place such as the Black Rock?
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Old August 20th, 2013, 08:57 AM   #11927
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wow.. this is impressive...
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Old August 21st, 2013, 08:42 AM   #11928
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Old August 21st, 2013, 07:40 PM   #11929
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incredible amazing pics , i hope see pics inside clock thanks Roukaya19
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Old August 22nd, 2013, 05:03 PM   #11930
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unreal
and now

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Old August 22nd, 2013, 05:43 PM   #11931
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Wow, incredible sight!
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Old August 22nd, 2013, 05:59 PM   #11932
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breathtaking!!!
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Old August 23rd, 2013, 06:17 PM   #11933
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Old August 24th, 2013, 02:59 AM   #11934
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Makkah Royal Clock

for the King Abdul Aziz Endowment Project, Makkah





Royal Clock for the King Abdul Aziz Endowment Project, Makkah, K.S.A., 2006 - 2011

SL-RASCH http://www.sl-rasch.de/p_1601.html

With the dedication of the Clock Tower commences a new era. Mandatory for the whole globe the largest clock of the world determines Makkah Time. It introduces a second time standard besides Greenwich Mean Time. Muslims in Berlin, London, New York or Jakarta know now exactly when with the rising sun in Makkah the Ramadan starts, when fasting can be broken after sunset or when the five daily prayers are to be performed towards Makkah. The Muslim World is synchronized to seconds’ accuracy by the time zones, Makkah marking the zero axis for calculation. The seventh tower of the King Abdul Aziz Endowment Project is not only a sky scraper; it is a gigantic compass and manifest of faith.

The idea of the Clock Tower was born when the group of hotel-towers at the gate to the Great Mosque was under construction. The structure had been calculated. It was not decided what the new tower top should look like, but its weight could not exceed 82,000 tons with all gears and clock dials. At the end of 2006 SL Rasch was entrusted with this specific task.

In order to maintain minimum weight and maximum load bearing capacity, the building engineers devised a skeleton construction with composite profiles comprising high tensile steel and concrete. Four V-shaped columns provide the basic frame of the tower’s supporting structure. Above the clock, the columns merge into a conical steel truss that follows the contours of the tower top and carries the forces directly from top to bottom.





But who shall build a clock with 43 x 43 meter dials, two of which must have oval shapes since the ground plan of the building is not square? Who will construct clockworks with the bulk of four overseas containers, which can move clock hands 17 or 22 meters long? And who is able to design the ten-storey high clock faces for storm proof installation at 450 meter height?

In the Swabian town Calw Bodo Rasch found the turret clock manufacturer Perrot who would take up the challenge. And in Dubai he found a builder specialized in open-sea yacht construction, who had experience with lightweight yet super high-strength glass and carbon fiber components.

The Clock’s huge faces, hands and pediments are all made of advanced composite materials which, while extremely durable, need to be protected from damaging UV rays. Extensive testing proved that glass mosaic is very effective at reflecting UV light and it serves as an excellent decorative material. It was decided for these reasons to furnish the faces of the Makkah Clock with custom-made glass tiling. With day and night temperature variations of up to 70°C, the tiles and adhesive had to be particularly resistant to the effects of thermal expansion.

In order to meet the demands of the project, which called for 46,000 sqm of mosaic, an automated production system was established. The extensive use of state of the art computer software in this project allowed for the prefabrication and preassembly of the composite elements inclusive of mosaic tiling and lighting devices.

The amount of research and optimization effort invested into the project can be exemplified by the clock’s hands. In some places they are built up using as many as 150 layers of carbon fiber laminate. It was through the use of Finite Element Analysis (FEA) that the team was able to verify the structural behavior of the clock hands down to the very smallest of details. FEA also gave the team the invaluable opportunity to assess the strength of these purpose-built composite materials. In order to allow for the maintenance of the installed LEDs, the hands had to be hollow and accessible via a concealed hatch in the clock face. Structurally the hands are also notable for being self bearing constructions, which have no supporting internal frame and, much like the hull of a boat, derive all their support and rigidity from their outer shell alone. At a combined total of 12 tons, the carbon fiber hands require an exceptionally strong and robust clock drive consisting of high-quality worm wheels, cogs and shafts. The final design was a classic central drive unit weighing 21 tons. It is the heaviest clock drive in the world.




The structure situated above the clock, the so called ‘glass jewel’ resembles the shape of a diamond. The design of the glass façade’s complex geometry was extremely difficult to achieve from a structural point of view, because nearly every glass pane was of a different shape and size.

At the top of the glass jewel solar panels have been installed to generate the power to drive the four clock units. A 45 m tall spire connects the glass jewel with the golden crescent. On the outside of the spire 160 loudspeakers have been installed in eight line arrays. Capable of broadcasting the call to prayer over a distance of 7 kilometers, the Clock Tower’s sound system is intended to make the call to prayer audible to all residents across the Holy City of Makkah, offering optimal sound levels at varying distances.

The innovative lighting system includes 44 beacon lights, 21,000 flashing bulbs and 2,200,000 LEDs.

The crescent is the largest crescent ever built, As a monocoque construction – with no steel structure inside – the crescent is entirely free from columns and beams, creating a space which includes the world’s highest prayer room inside a building.










Cosmology center and public exhibition facilities

The interior space behind the clock faces houses a cosmology center and public exhibition facilities. On four floors visitors will gain information about the development and construction of the clock tower, about the history of Islamic time measurement as well as the history of the Qur’an. The Cosmology Center highlights the significance of the moon in Islamic religion and the crucial role it plays in establishing the calendar.

Lunar Center and Makkah Time Institute

The ‘glass jewel’ above will be the home of the Lunar Center and the Makkah Time Institute. The Makkah Time Institute is one of sixty time-institutes worldwide and its atomic clock is one of approximately 400 atomic clocks around the world. The lunar center provides astronomers and scholars of Islamic sciences with the latest modern research instruments, including a large telescope and is affiliated with all Islamic research centers worldwide. With this program of activities the foremost Clock Tower of the Arab World attains a higher sense as mediator between religion and science. Finally, SL Rasch succeeded in giving it an Islamic character by integrating main features of Islamic artwork in its design.




Specifications

Steel structure: 12,000 tons. Lowest steel section starts 347 meters above ground, peaks 607 meters above ground
Clock Drive and Hands:4 clock drives, 21 tons each
Minute hand: 23 meters long, hour hand: 17 meters long; minute and hour hand combined weigh 12 tons
Clock Faces:North and south faces: 43 meters x 43 meters, east and west faces: 37 meters x 43 meters
Composite Materials: 43,000 sqm of composite cladding, 600 glass fiber-reinforced panels on the clock faces
Mosaic: 98 million glass mosaic tiles in 6 colors, 13,000 sqm in gold mosaic
Lightning Protection: Approx. 800 fixed lightning rods, 20 telescopic Franklin rods
Glass Jewel: 3000 sqm of glass. Glass panes are 65 mm thick and withstand wind forces of up to 170 kg/sqm
Observatory: 1.2 diameter scientific telescope
Solar Panels: 288 solar panels, 11,000 individual photovoltaic cells, nominal power: 34,5 kWp
Spire and Crescent: Spire is approx 50 meters high
Observation deck at the tip of the spire is 558 meters above the ground
Crescent weight: 107 tons, crescent diameter: 23 m Crescent and base is covered with 1050 sqm gold mosaic
Loudspeakers: 160 speaker units, each unit weighs approximately 200 kilograms.
Total acoustic output of over 160 decibels, audible at a distance of up to 7 kilometers
Makkah Time Institute: One of more than 50 time institutes worldwide, connected to the UTC network; 5 cesium standards




















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Old August 24th, 2013, 11:16 AM   #11935
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Why is it Green? Shouldn't it be yellow like most of clock towers?
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Old August 24th, 2013, 11:30 AM   #11936
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In the ctbuh it is completet but why it is here t/o
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Old August 24th, 2013, 12:03 PM   #11937
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such a shame so many people dislike the tower. i think it is just a masterpiece, the design is unique, the building is as massive as a mountain. the building does make a good job combining modernity with the lights with traditional architecture. it serves an important purpose and the details on the building are simply astonishing. it is by far the most underrated supertall.
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Old August 24th, 2013, 03:52 PM   #11938
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Quote:
Originally Posted by erkantang View Post
In the ctbuh it is completet but why it is here t/o
We discussed this in the World One thread:
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Originally Posted by Vito Corleone View Post
As far as calling a building completed goes, it has to be topped out, fully clad and at least occupiable. Also, a building cannot be officially ranked unless it has a status of "completed." (This was changed 5 years ago. The original criteria stated that a building could be listed in the official rankings when it topped out).
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Makkah Royal Clock Tower Hotel cannot be fully clad and hence cannot be completed because there are two cranes mounted on the wall.
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Originally Posted by Vito Corleone View Post
Good catch! Unfortunately my hands are tied on this one, since the CTBUH claimed that it was one of the 20 tallest buildings completed in 2012.

Last edited by pteranodon; September 8th, 2013 at 06:56 PM.
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Old August 24th, 2013, 10:24 PM   #11939
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such a shame so many people dislike the tower. i think it is just a masterpiece, the design is unique, the building is as massive as a mountain. the building does make a good job combining modernity with the lights with traditional architecture. it serves an important purpose and the details on the building are simply astonishing. it is by far the most underrated supertall.
Well, some people dislike it simply because this is not "genuine" architecture. This is a temple celebrating Allah. It's not mainly a trophy showing architectual skill.

Other people think that it's a monstrosity because it's not modern. It looks older than the Empire State Building because of its brown stone facade.

And still other people dislike the design because it's not unique. It's basically a clock tower enlarged. Like Big Ben, but Islamic. In fact, it's so enlarged that it looks like a mountain, like you said. You could basically get a picture of a desert, photoshop Makkah Royal Clock Tower in it, and normal people (not skyscraper fans) would believe it's a genuine picture even if you show them a picture of the real tower.

I think the lighting is kinda creepy, also.
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Old August 25th, 2013, 02:24 PM   #11940
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WOW WOW WOW awesome pics

thanks Roukaya19
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