Torre Altus

Torre Altus

Torre Altus stands as one of Mexico City’s most iconic residential skyscrapers. With a roof height of 174 m spread over 45 storeys, it commands the exclusive Bosques de las Lomas district. Completed in 1998, the tower combines robust seismic engineering with high-end residential amenities, setting a benchmark for vertical luxury living in seismic zones.

Project Overview

Location and Site Context

Torre Altus occupies a prime corner at Paseo de los Laureles and Alcanfores, nestled within the hilly terrain of Bosques de las Lomas. The site required extensive stabilization to account for volcanic and alluvial soils, as well as sloping topography. Its orientation maximizes panoramic views toward Chapultepec Park and the western mountain ranges.

Timeline and Delivery

Construction commenced in early 1994 and reached completion by mid-1998. Major milestones included:

• Site excavation and slurry wall installation: 1994
• Foundation piling and raft construction: 1995
• Superstructure rise and façade installation: 1996–1997
• Interior fit-out, systems commissioning, and handover: 1997–1998

Architectural Design and Concept

Form and Massing

The slender form features a central concrete core flanked by two narrower wings, creating a Y-shaped plan that enhances wind performance and daylight access. A two-storey penthouse crowns the tower, linked by an internal sky lobby. Horizontal metal fins on the upper levels accentuate its verticality while shading glazed surfaces.

Floor Plate and Vertical Circulation

Each typical residential floor offers approximately 1 750 m² of column-free space. The building incorporates:

• One exclusive apartment per floor with private elevator lobby
• Fifteen high-speed passenger lifts traveling at up to 6.2 m/s
• Two pressurized stairwells serving as emergency egress

Foundation and Geotechnical System

Subsoil Conditions

Borehole investigations identified a 15–25 m layer of soft volcanic ash and silty clays over firmer deposits. To reach competent strata, deep foundations were essential.

Pile and Raft Foundation

The foundation consists of 100 reinforced-concrete bored piles, each extending 25 m below grade, tied together by a 2 m-thick raft slab. This system distributes gravity and lateral loads into stiffer subsoil, while a contiguous slurry wall contained groundwater and supported the excavation.

Structural System and Seismic Design

Core and Frame

A cast-in-place high-strength concrete core resists lateral forces, while post-tensioned composite slabs span to perimeter columns. Steel reinforcement in coupling beams and moment-resisting connections ensures ductility.

Seismic Mitigation

Given Mexico City’s high seismicity, Torre Altus employs:

• Tuned mass damper at level 44 to absorb wind and quake–induced sway
• Ductile detailing in shear walls and core coupling beams
• Base-level energy-dissipation devices to limit interstory drift to under 1% of story height

Building Envelope

Curtain Wall Assembly

The façade is a unitized aluminum-frame system with double-glazed, low-emissivity tempered glass. Horizontal sun-shades and vertical fins reduce direct solar gain and glare.

Thermal and Acoustic Performance

• Overall U-value of envelope: 1.8 W/m²·K
• Solar heat gain coefficient: 0.30
• Sound Transmission Class (STC): 42

These parameters contribute to reduced HVAC loads and superior acoustic comfort.

Vertical Transportation and Accessibility

Elevator System

• Fifteen machine-room-less high-speed elevators with destination dispatch
• Redundant power and seismic sensors for automatic lofting to safe floors
• Two service elevators (2 000 kg capacity) for logistics and maintenance

Accessibility Features

Accessible routes connect all public areas, with level thresholds and tactile signage guiding residents and visitors.

Mechanical, Electrical, and Plumbing Systems

HVAC and Environmental Controls

• Central chiller plant with absorption and electric chillers totaling 3 200 kW
• Variable Air Volume (VAV) boxes controlled by a Building Management System (BMS)
• Heat-recovery wheels in air-handling units achieving 60% energy reuse

Electrical Infrastructure

• Dual-feeder supply from two substations with automatic transfer-switching
• Roof-mounted photovoltaic array delivering 150 kWp peak
• LED fixtures with occupancy and daylight sensors throughout common zones

Plumbing and Water Conservation

• Automatic water-saving fixtures reducing potable use by 40%
• Rainwater harvesting for irrigation and cooling-tower makeup
• Greywater system for toilet flushing and landscape irrigation

Smart Building and BMS Integration

Intelligent Building Management

The BMS oversees HVAC staging, lighting levels, elevator traffic, and fire-safety systems in real time. Key features include:

• Fault detection analytics to preempt equipment failures
• Adaptive scheduling based on occupancy patterns
• Remote monitoring and mobile alerts for facility managers

Automated Water and Lighting Control

Integrated controls modulate lighting via daylight sensors and regulate pump speeds to match demand, achieving annual energy savings of up to 20%.

Fire Protection and Safety Systems

Sprinkler and Alarm Systems

• Fully zoned wet-pipe sprinkler network complying with NFPA standards
• Addressable fire-alarm panels with voice-evacuation capability
• Smoke exhaust fans and pressurized stair enclosures on every level

Emergency Power and Egress

An on-site 1 200 kVA diesel generator supports critical circuits, including emergency lighting, elevators, and fire pumps.

Amenities and Residential Features

Luxury Living Spaces

Each full-floor apartment features:

• Floor-to-ceiling glazing with panoramic views
• 3.45 m floor-to-ceiling height for spacious volumes
• Automated climate, shading, and lighting control

Resident Facilities

• Indoor pool, spa, and fitness center
• Multipurpose function room and private lounge
• Helipad and rooftop terrace with landscaped gardens
• Secure underground parking for 200 vehicles and bicycle storage

Performance under Seismic Events

Since opening, Torre Altus has withstood several significant quakes, including a magnitude 7.6 event in 2003 without structural damage. Post-event inspections confirmed system resilience and minimal residual drift, validating the seismic design strategy.

Conclusion

Torre Altus exemplifies a high-rise residential tower engineered for luxury and resilience. Its combination of deep foundations, ductile concrete core, tuned mass damper, and state-of-the-art building services positions it as a benchmark for seismic-safe skyscrapers. Nearly three decades after completion, it continues to set the standard for technical excellence and elevated living in Mexico City.