Project Description

iCITY - The new business center high-rise of A + class is part of CITY TPU, which will combine the Moscow Business Center Business Center station, the Mezhdunarodnaya metro station and the Business Center metro station, public transport stops, the building is equipped with a helipad and 1443 parking lots.

Two towers of 26th and 52th floors are respectively united by a common stylobate and atrium.

The complex has a developed infrastructure: a fitness center, a conference center, shops, cafes and restaurants and comfortable lobbies.

Clancy Engineering, in close collaboration with the JAHN Architects, and personally with Helmut Jan, developed the concept of engineering and structural solutions to best meet the commercial needs of the customer. The solutions were coordinated with the architectural concept, facade solutions, the fire protection concept and vertical transport solutions. The technological requirements, the wishes of the customer and potential tenants were taken into account in order to increase the commercial area of the project and the location of shafts that.

Helmut Jahn is a German and American architect, whose style was influenced by Mies van der Rohe and Soviet constructivists. The architect tries to pay attention to both the functionality and the beauty of his buildings. Among Jan's work are stadiums, airports and skyscrapers around the world, including the famous Sony Center in Berlin.


Pic. 1. Orientation of buildings to the cardinal points / Helmut Jahn

On the south side of the facades it was proposed to use shading glazing (fritts) and arrange "loggias" that communicate with the outside air, which will save office workers from the "aquarium syndrome", allow you to enjoy the views and breathe in fresh air during the working day, without leaving the office floor.


Pic. 2. The device of loggias

The entrance group of the complex is located in a tunnel under the stylobate, crossing the border of the building, visitors enter the space of a multi-level atrium, which, expanding on the upper floors, forms a multi-functional lobby space.


Pic. 3. Roofing stylobate

Pic. 4. The interior of the atrium

The fundamental principle in the design of a high-rise business center is the use of rational, three-dimensional, architectural, planning and structural solutions and solutions for engineering systems that will allow you to get an effective core and maximum rental area, reduce energy consumption, negative impact on the environment and increase comfort employees.

Clancy Engineering's goal was to design a world-class skyscraper using international best practices and standards. Therefore, we used both Russian and best international practices and American standards when designing HVAC systems - ASHRAE, which require a more detailed analysis of comfort and energy efficiency.

When creating the concept of engineering systems solutions, the Clancy Engineering team was advised by Peter Simmonds, an international expert on high-rise building systems engineering, who implemented skyscraper projects in the USA, Hong Kong, China, Korea and other countries.

Particular attention was paid to the selection of the most energy-efficient engineering solutions, analysis of the comfort of employees in the office, the possibility of periodic use of natural ventilation. The task in this case was to reduce heat loss, preserve the building’s biological environment, guided by the principles of adaptability, sustainable development, environmental friendliness and energy efficiency.

The following bioclimatic techniques were applied on this project: natural shading of the front glazing, the location of the building on the cardinal points so that energy losses were minimized, natural ventilation.

A detailed analysis of the facade systems, which form the shell of a skyscraper, is a very important part of the building, which to a greater extent affects the performance indicators of the building. At the same time, the facade must meet aesthetic requirements, an important factor in the commercial component.

Part of the facade has an internal shading layer - fritt, which is able to protect against excessive external thermal radiation, but at the same time practically does not reduce the transparency of the structure.

Analysis of the thermal comfort of office workers

Analysis of the climatic comfort of employees makes it possible to choose the best option for engineering solutions according to the parameters of temperature, humidity and air mobility, as well as the temperature of radiation. This analysis allows you to calculate and take into account the percentage of people who are not satisfied with the indoor climate and make decisions that reduce this percentage.

As a solution, a system of radiant ceilings was proposed, which makes it possible to increase the level of comfort of workers with workplaces near the facade.

Natural ventilation

The analysis showed the possibility of periodic use of natural ventilation. Solutions were suggested for periodically ventilating the premises with the help of the opening facade elements - in manual or automatic mode. Periodic transition to natural ventilation in offices is possible in the period from April to September, with automatic shutdown of the central air conditioning system of the office.
Radiant ceilings - cooling and heating mode

In the course of our work, we made a comparison of applicability and operational efficiency for various alternatives of ventilation, air conditioning, and heating systems. As a result of the work, about 32 options were checked, comparative diagrams of energy consumption were constructed, the values of heat and refrigeration loads, air consumption, Energy Use Intensity (EUI) - specific energy consumption per m2 per year.

This analysis showed the customer a complete picture of the HVAC solutions. As a result, the most effective solution for this building was proposed radiant ceilings that work both for cooling and heating, and the traditional option for office buildings in the Russian Federation - 4-pipe fan coil units with an inverter engine. Radiant ceilings will achieve greater comfort for visitors by cooling / heating the surface of the facade and get greater energy efficiency due to the lack of engines in their design.

Zoning of engineering systems

Tall buildings require the organisation of hydraulic fractures, zoning in height. To preserve the architectural concept, the proposed technical zones were used - intermediate and upper technical floors.To accommodate the main engineering equipment, a power unit was created, located on the lower floor of the stylobate.

The power unit includes: a zone for transformers and main switchgear, a refrigeration center, a central heating station, a central control room and a fire department. Thus, the main technical rooms and premises of the building operation and monitoring service are located in close proximity.

Structural Solutions

Structural Solutions play a fundamental role for the entire project. When developing the concept of Structural solutions, special attention was paid to safety, the issue of optimising the core, the possibility of implementing Architectural Solutions, the mutual influence on engineering systems, vertical transport and facades.

The core study included the analysis of numerous options for the layout of vertical transport shafts, the placement of aircraft, mines and rooms for engineering systems. Together with architects, engineers, the optimal kernel layout option was proposed.

An analysis was made of the possibility of maintaining the proposed step of the columns using the post-tension technology.The use of outriggers on the intermediate and upper technical floors of a high tower made it possible to achieve greater building stability. The proposed design solutions made it possible to achieve “lightness” and at the same time rigidity of the building frame.


  • We have developed, coordinated and are fully responsible for solutions up to the construction of the building
  • 9.1% of the commercial space was added compared to the original architectural concept as a result of the development of solutions for the core, vertical transport, fire safety and engineering systems
  • 15.2% of the commercial space was added to the premium upper floors of the taller tower
  • 14.5% of concrete was saved as a result of post-tention technology
  • The proposed solutions have received full justification and confirmation of optimality, they are implemented in Russia and comply with both Russian and international standards
  • Customer requirements are satisfied: maximum rental area, required ceiling height, required density of seating (10 m2 / person) is maintained. The architectural solutions of the JAHN concept were maintained and refined in compliance with concept architects requirements; an increased level of comfort for office workers was provided
  • The project introduced new energy-efficient technologies that minimize operating costs
  • A detailed and comprehensive technical task has been drawn up for the development of the Permit stage, which does not require additional analysis

Clancy Engineering Team

  • Olga Vinogradova
  • Olga Semenova
  • Roman Motor
  • Evgeny Rypalov
  • Mikhail Malygin
  • Maxim Medvedev
  • Evgenia Antonova
  • Ivan Bobrovsky

Clancy Engineering - Designing the Future!


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Project Information

239000 м2






Helmut Jahn / US


  • MR Group