The rise of
periscope architecture
in modern construction

[ scroll tot learn more ]

Periscope architecture aspires to redefine how we build—pioneering innovative structures that shape a more sustainable world. The Periscope House is a bold exploration of this vision, seamlessly blending architecture with periscope-like elements to forge unique connections between subterranean living spaces and the surrounding landscape.

By building below ground level, the design challenges conventional basement environments, instead fostering a soft, stable microclimate. At the heart of the concept are vertically moving mirrored walls, angled precisely at 45 degrees. These dynamic elements open up surprising visual and spatial experiences—inviting light, views, and a sense of expansiveness underground.

Powered by solar energy, the telescopic mirror mechanisms rise with the sun. As they lower, their weight is harnessed as a gravity battery, storing energy for future use. This eco-conscious approach not only enhances performance but also embodies a poetic synergy between nature, technology, and design.

The Periscope House is more than a building—it is a living system. A fusion of sustainability, artistry, and transformation, it reimagines how architecture can evolve with the planet and seamlessly blend the physical and virtual worlds.

The rise of
periscope architecture
in modern construction

[ scroll tot learn more ]

Periscope architecture aspires to redefine how we build—pioneering innovative structures that shape a more sustainable world. The Periscope House is a bold exploration of this vision, seamlessly blending architecture with periscope-like elements to forge unique connections between subterranean living spaces and the surrounding landscape.

By building below ground level, the design challenges conventional basement environments, instead fostering a soft, stable microclimate. At the heart of the concept are vertically moving mirrored walls, angled precisely at 45 degrees. These dynamic elements open up surprising visual and spatial experiences—inviting light, views, and a sense of expansiveness underground.

Powered by solar energy, the telescopic mirror mechanisms rise with the sun. As they lower, their weight is harnessed as a gravity battery, storing energy for future use. This eco-conscious approach not only enhances performance but also embodies a poetic synergy between nature, technology, and design.

The Periscope House is more than a building—it is a living system. A fusion of sustainability, artistry, and transformation, it reimagines how architecture can evolve with the planet and seamlessly blend the physical and virtual worlds.

Space enhancing glass & mirrors

Glazing, in all its colourful, reflective facets, is central to every architectural design. Not only does it contribute to aesthetics, but it is also one of the key pillars in creating energy-efficient buildings.

The strategically placed mirrors used in the project maximise light reflection and create depth. At the same time, advanced glazing systems such as low-emissivity (Low-E) and dynamic glass optimise thermal comfort. Transparent glass elements enhance the connection between indoor and outdoor.

Due to the XXL dimensions of the mirrors (approximately 7.9 m in height) for the Periscope project, Group Ceyssens developed a custom ‘level system’ in stainless steel that will be mounted directly onto the base structure. This innovative solution allows for precise correction of any concave (bottom) or convex (top) deformation caused by gravity or movement within the primary structure. As a result, a pristine projection of the environment is always guaranteed.

Space enhancing
glass & mirrors

Glazing, in all its colourful, reflective facets, is central to every architectural design. Not only does it contribute to aesthetics, but it is also one of the key pillars in creating energy-efficient buildings.

The strategically placed mirrors used in the project maximise light reflection and create depth. At the same time, advanced glazing systems such as low-emissivity (Low-E) and dynamic glass optimise thermal comfort. Transparent glass elements enhance the connection between indoor and outdoor.

Due to the XXL dimensions of the mirrors (approximately 7.9 m in height) for the Periscope project, Group Ceyssens developed a custom ‘level system’ in stainless steel that will be mounted directly onto the base structure. This innovative solution allows for precise correction of any concave (bottom) or convex (top) deformation caused by gravity or movement within the primary structure. As a result, a pristine projection of the environment is always guaranteed.

Renewable energy & storage

As with most residential projects, the starting point is a set of 288 premium glass/ glass solar panels (440 Wp). The generated solar energy will be stored in a modular Energreen battery unit of 240 kWh, combined with an intelligent EMS, that can trade energy with the grid, also allowing the battery to charge at low solar activity periods (e.g. at night) when prices are low.

The stored energy in turn provides power to the lifting columns for opening up the ‘mirror roof structure’. The telescopic columns use an intelligent motor drive and generator module, that regains energy during load lowering. This regained energy is subsequently fed back into the battery for storage creating a semi-closed loop and optimal energy efficiency.

Renewable
energy & storage

As with most residential projects, the starting point is a set of 288 premium glass/ glass solar panels (440 Wp). The generated solar energy will be stored in a modular Energreen battery unit of 240 kWh, combined with an intelligent EMS, that can trade energy with the grid, also allowing the battery to charge at low solar activity periods (e.g. at night) when prices are low.

The stored energy in turn provides power to the lifting columns for opening up the ‘mirror roof structure’. The telescopic columns use an intelligent motor drive and generator module, that regains energy during load lowering. This regained energy is subsequently fed back into the battery for storage creating a semi-closed loop and optimal energy efficiency.

Draft calculation

of the energy process

[ gravity calculation upper mirrors ]
[ pieces ]
[ length ]
[ perimeter ]
[ surface - m2 ]
[ volume - m3 ]
[ weight - kg/m ]
[ weight - kg/m3 ]
[ total weight ]
Fill weight (soil)
52,00
6,00
312,00
2.000,00
624.000,00 kg
Self-weight / dead load of the mirror structure and Corten steel cladding (4mm)
52,00
22,10
0,004
4,60
7.600,00
160.519,68 kg
Internal structure in IPE 3000 of the mirror structure
7,00
52,00
42,20
15.360,80 kg
Total weight per mirror section
799.880,48 kg
Total weight of all upper mirrors (4)
3.199.521,90 kg
[ produced energy during descent of the mirrors - over a height of approximately 4.4m within a timespan of 4 hours ]
[ solar panels energy production ]
[ pieces ]
[ wp / panel ]
[ total ]
For 1 descending mirror, taking into account an inertia loss of 20%
7,68 kWh/day
zonSolar panel
(surface area 1.775m2)
288
440,00
126.720,00 wp/day
For 4 descending mirrors
30,72 kWh/day
Concerted to kWh
302,5 kWh/day
[ required energy for lifting a mirror - over a height of approximately 4.4m  ]
[ energy output ]
For 1 mirror to be lifted
9,59 kWh/day
Energy output of the system from descending mirrors in combination with the solar panels
333,22 kWh/day
For 4 mirrors to be lifted
38,36 kWh/day
Energy requirement for lifting the mirrors
-38,36 kWh/day
Total energy output per day
294,86 kWh/day

Draft calculation of the energy process

Telescopic & gravity motion

Düsterhus GmbH’s lifting technology provides the Periscope with the basis for the up and down movement concept of the mirrors and masses. The lifting columns convert rotational motion into translational movement through motor-driven rotating multiple spindle systems that facilitate the lifting process.

Special gears ensure the optimal conversion of force and speed. Lifting systems can consist of a singular column or, as in this case, multiple columns working in parallel. An intelligent control unit ensures precise synchronization of the entire system. Düsterhus GmbH’s lifting solutions offer the ability to store the energy generated during load lowering. Using the intelligent motor drive and generator module, this energy can subsequently be fed back into storage.

This sustainable approach significantly reduces energy consumption compared to conventional drive systems. By utilizing ball screws and corresponding gears, optimal efficiency is achieved, all the while maintaining minimal noise emissions.

Telescopic & gravity
motion

Düsterhus GmbH’s lifting technology provides the Periscope with the basis for the up and down movement concept of the mirrors and masses. The lifting columns convert rotational motion into translational movement through motor-driven rotating multiple spindle systems that facilitate the lifting process.

Special gears ensure the optimal conversion of force and speed. Lifting systems can consist of a singular column or, as in this case, multiple columns working in parallel. An intelligent control unit ensures precise synchronization of the entire system. Düsterhus GmbH’s lifting solutions offer the ability to store the energy generated during load lowering. Using the intelligent motor drive and generator module, this energy can subsequently be fed back into storage.

This sustainable approach significantly reduces energy consumption compared to conventional drive systems. By utilizing ball screws and corresponding gears, optimal efficiency is achieved, all the while maintaining minimal noise emissions.

Low carbon emission steel

ArcelorMittal is one of the world’s leading integrated steel and mining companies. It is the largest steel producer in Europe, among the largest in the Americas, and has a growing presence in Asia. At ArcelorMittal, we developed the Steligence® concept because we sincerely believe that we can help architects, engineers and developers work together to build more sustainable and cost-effective buildings. Moreover, we wanted our ArcelorMittal Steligence® philosophy to be thoroughly underpinned by science. Therefore, every aspect of it is based on peer-reviewed and unbiased scientific research.

With a holistic approach to construction, the concept encourages continuous innovation and enables the construction industry to analyze the social, economic and environmental impacts of different building options, maximize the use of intelligent steel, and develop buildings whose components complement each other optimally.

The engineering team of ArcelorMittal Steligence® produced the feasibility study and structural pre-dimensioning for the moving parts of The Periscope. These parts have the task of supporting the loads, ensuring the key function of stability and structural safety even in dynamic conditions, and at the same time meeting the specific functional, aesthetic and architectural functions of the building. The proposed structure is made with a truss system, built using hot-rolled sections. The structure is optimized by proposing a high strength steel grade.

Low carbon
emission steel

ArcelorMittal is one of the world’s leading integrated steel and mining companies. It is the largest steel producer in Europe, among the largest in the Americas, and has a growing presence in Asia. At ArcelorMittal, we developed the Steligence® concept because we sincerely believe that we can help architects, engineers and developers work together to build more sustainable and cost-effective buildings. Moreover, we wanted our ArcelorMittal Steligence® philosophy to be thoroughly underpinned by science. Therefore, every aspect of it is based on peer-reviewed and unbiased scientific research.

With a holistic approach to construction, the concept encourages continuous innovation and enables the construction industry to analyze the social, economic and environmental impacts of different building options, maximize the use of intelligent steel, and develop buildings whose components complement each other optimally.

The engineering team of ArcelorMittal Steligence® produced the feasibility study and structural pre-dimensioning for the moving parts of The Periscope. These parts have the task of supporting the loads, ensuring the key function of stability and structural safety even in dynamic conditions, and at the same time meeting the specific functional, aesthetic and architectural functions of the building. The proposed structure is made with a truss system, built using hot-rolled sections. The structure is optimized by proposing a high strength steel grade.

Another important aspect is the reduced equivalent carbon content of the proposed material, moving towards a structure whose greater sustainability is achieved thanks to the structural optimization combined with our XCarb® low carbon emission steel.

Through a structural analysis, the sizing of the high and low structures was achieved. An iterative optimization was applied. The sizing allowed to establish the sections and the structural behavior of the system. This led to a tonnage estimation. Particular burdens of the structure are those of ensuring a level of rigidity such as not to compromise the architectural parts, including the mirrors, which have a key architectonical function in the project, and to be able to adequately transfer the loads to the mobile supports. This considering the consistent gravitational loads resulting from the green roof and the mirrors hung around the perimeter. The two complex structures must therefore be in tune with the support devices and their technology, ensuring correct compatibility.

Another important aspect is the reduced equivalent carbon content of the proposed material, moving towards a structure whose greater sustainability is achieved thanks to the structural optimization combined with our XCarb® low carbon emission steel.

Through a structural analysis, the sizing of the high and low structures was achieved. An iterative optimization was applied. The sizing allowed to establish the sections and the structural behavior of the system. This led to a tonnage estimation. Particular burdens of the structure are those of ensuring a level of rigidity such as not to compromise the architectural parts, including the mirrors, which have a key architectonical function in the project, and to be able to adequately transfer the loads to the mobile supports. This considering the consistent gravitational loads resulting from the green roof and the mirrors hung around the perimeter. The two complex structures must therefore be in tune with the support devices and their technology, ensuring correct compatibility.

Structural analysis loads
top structure

Material quantity estimation
top structure

Structural analysis loads
lower structure

Material quantity estimation
lower structure

Structural analysis loads

top structure

[load group]
[load]
[application load]
[density-p(kg/m3)]
[dim. t-m]
[surf.load-kN/m2]
[line load-kN/m]
[incr. (-)]
[surf.load-kN/m2]
[line load-kN/m]
G1
self weight
concrete slab
surf. A, B
2500
0,160
4,000
0,10
4,400
finishing layers
surf. A, B
2400
0,080
1,920
0,10
2,112
line A
3,500
0,00
3,500
line B
2,400
0,00
2,400
line C
2,000
0,00
2,000
G2
green roof
surf. A, B
1700
1,000
17,000
0,00
17,000
line A
8,5
0,00
8,500
mirror
surf. C
2500
0,030
0,750
0,00
0,750
line C
1,058
0,00
1,058
utilities
surf. A, B
0,500
0,00
0,500
Q
category load
0,500
0,10
0,550
snow
1,000
0,10
1,100
wind
-0,800
0,10
1,100

Material quantity estimation

top structure

[ element ]
[ section ]
[ mat. ]
[ G - kg/m ]
[ S - m2/m ]
[L - m]
[ N ]
[ W - kg ]
[ S - m2 ]
Spine beams
IPE 750x147
S460M
147
2,505
376,0
1
55272
942
Elem. 1
HE 360 A
S460M
112
1,834
238,0
1
26653
436
Elem. 2
HE 200 A
S460M
42,3
1,136
144,5
1
6112
164
Elem. 3
HE 300 B
S460M
117
1,732
120,1
1
14054
208
Tie
RD 60
S460M
22
0,188
161,1
1
3575
30
Crossbeam
IPE 360
S460M
57,1
1,353
67,2
1
3837
91
Elem. 4
HE 300 A
S460M
88,3
1,717
137,2
1
12114
236
Stabilization 1
HE 200 A
S460M
42,3
1,136
418,3
1
17692
475
Stabilization 2
RD 40
S460M
10
0,126
894,6
1
8825
112
Fabrication, stiffeners, weld, bolts
5925
108
Total
154059
2803
Gross total tonnage [kg]
154059
Surface to be treated [m2]
2803

Structural analysis loads

lower structure

[load group]
[load]
[application load]
[density-p(kg/m3)]
[dim. t-m]
[surf.load-kN/m2]
[line load-kN/m]
[incr. (-)]
[surf.load-kN/m2]
[line load-kN/m]
G1
self weight
finishing layers
surf. A
1,000
0,10
1,100
G2
mirror
surf. B
2500
0,030
0,750
0,00
0,750
utilities
surf. A
0,500
0,00
0,500
Q
category load
Surf. A
0,500
0,10
0,550
snow
wind

Material quantity estimation

lower structure

[ element ]
[ section ]
[ mat. ]
[ G - kg/m ]
[ S - m2/m ]
[L - m]
[ N ]
[ W - kg ]
[ S - m2 ]
Truss chords
HE 120 A
S460M
19,9
0,677
826,8
1
16453
560
Truss diagonals
HE 100 A
S460M
16,7
0,561
718,1
1
11992
403
Truss cross-beams
HE 120 A
S460M
19,9
0,677
280,0
1
5572
190
Montants
HE 120 A
S460M
19,9
0,677
451,3
1
8982
306
Support beam
IPE A 120
S460M
8,7
0,472
736,7
1
6409
348
Fabrication, stiffeners, weld, bolts
1976
72
Total
51384
1878
Gross total tonnage [kg]
51384
Surface to be treated [m2]
1878