Hazama Ando Tohoku Branch Office Building
Facility Management (FM) Initiatives

HAZAMA ANDO CORPORATION is looking to transform its business portfolio into one that balances both flow and stock businesses. In doing so, the Company aims to stabilize earnings in response to changes in business conditions surrounding the construction industry.
As a part of this endeavor, HAZAMA ANDO is engaging in the facility management (FM) business to promote the effective use of real estate including a branch building held in Japan.

Also engaged in realizing a carbon-neutral society, as it sets out to rebuild the Tohoku Branch Building, HAZAMA ANDO aims to create a next-generation, energy-saving office building that enables good health and high productivity utilizing local characteristics, and will therefore adopt various environmental technologies, including a ceiling mounted radiant cooling system^（Note1） using well water. The Company plans to acquire Net-ZEB certification (at least 100% energy reduction) for the office floors and ZEH-M Oriented certification (at least 20% energy reduction) for the rental apartment floors.
Along with applying and verifying its know-how regarding the benefits of ZEB conversion, including comfort and BCP performance, as seen from multiple angles in one of its own properties, the Company will also connect this effort to future proposals to customers.

With work to demolish the old branch building currently underway, and construction of a new branch building scheduled to begin in July 2022, operations are projected to commence around the end of fiscal 2023.

１．Environmental Technologies

（１） Energy-saving and Energy-creating Technologies

1. Ceiling-mounted radiant cooling system using well water (energy-saving technology)
   The air conditioning system for the office floors will utilize a ceiling-mounted radiant cooling system in aims of saving energy, as well as of creating an office environment that is healthy and comfortable. This system will also allow for on-site groundwater (well water) sampling, and satisfies all well water usage criteria, thereby enabling the use of well water as an air conditioning heat source to further improve energy-saving effectiveness.

2. Passive energy-saving technology
   The Company will enhance the insulation performance of the entire building by selecting external wall materials with high insulation performance, reinforcing external rooftop insulation, adopting Low-E double-glazed glass^（Note2）, and reinforcing insulation between dwelling units, and will control solar radiation using eaves and balconies in aims of reducing air conditioning loads. The office floors are also designed with a natural ventilation system centered on internal stairwells as a means of reducing air conditioning energy during intermediate periods.

3. High-efficiency facilities and equipment (energy-saving technology)
   All of the lighting will use LED lights. In particular, office lighting fixtures will be designed to allow for individual control, which will enable offices to employ daylight sensors as a means of significantly reducing lighting energy. In addition, water heaters and air conditioning units on the apartment floors will use high-efficiency facilities and equipment to achieve energy-saving rates on the level of ZEH-M Oriented certification.

4. Solar power generation using building walls (energy-creating technologies)
   Installing solar panels over most of the rooftop area and the south-facing wall will ensure the building meets the energy-creating rates required to achieve Net-ZEB. The wall-mounted solar panels installed on the building’s south-facing side will also act as eaves that control solar radiation. Together with private power generators and storage batteries, these solar panels will also function as an emergency power source, and will contribute to ensuring BCP performance as the Company’s local flagship office.

（２）Environmentally-friendly Building Materials

The mat slabs and CFT columns will be made from a low-carbon, environmentally-friendly concrete that reduces CO₂ emissions originating from concrete materials. Depending on the area of use, structures will be made from CfFA (using high-quality fly ash) and BBFA (using type B blast furnace cement and fly ash). Both types of concrete reduce CO₂ emissions by replacing some of the raw materials with industrial by-products.

２．Structural Technologies: HAZAMA ANDO Buckling Restraint Brace (AH-BRB)

AH-BRB is an original technology owned by the Company. AH-BRB clads the core member with a buckling restraint material, which acts as a brace that can resist seismic forces to stabilize the core member when subject to compression in the same manner as when subject to tension.
Standard steel frame braces will buckle when subject to high compression, and therefore display an unstable behavior. Using this technology, however, the structure exerts the same stable seismic performance when subject to compression as it does when subject to tension, thereby improving the seismic performance of the entire building. In addition, this technology enables a more compact buckling restraint steel member for excellent economy.