Quality specifications

The building is wrapped in a double skin formed by scales of glass and aluminium which give it a unified appearance and express the dimensions of a tall building with a recognizable urban image.

This double skin allows the inner skin to be adapted to different uses, while the outer skin gives the building a homogeneous appearance.

In this way, temperature control is very efficient, using glass with exacting solar control features. The frames of the outer skin are attached to the slabs using cast aluminium.

The elements of the outer skin are composed of metal frames made of extruded aluminium and laminated glass with grey high-absorption butyral. As they are fully ventilated, they radiate the heat absorbed.

The inner facade consists of opaque or transparent modular elements, according to the needs inside. The transparent parts are double-glazed panels, while the opaque parts are insulated aluminium panels. There are opaque areas at the top and at the bottom, which cover the access floors and ceilings, including complementary protection for the sectorization of fires.

The solar factor of the glass is as follows:

• Outer skin.- 0.52
• Inner skin.- 0.39
• Together.- 0.26

The acoustic attenuation of the glass in the inner skin of the facade is 43db.

At the finial levels -of a different height for each of the three parts of the tower and which can only be accessed by authorized personnel- are the three gondolas which provide an integrated service for each of the three parts of the building. These gondolas are hidden behind the prolongation of the facade above the level of the structure, like a false parapet.

Generally speaking, the inside walls are of plasterboard and are painted in flat white plastic paint.

The garage walls were rendered and then painted with smooth vinyl paint with an eggshell finish.

The walls to the emergency staircase and the storerooms in the first basement and the machine rooms will be painted with acrylic-based petrous paint.

The circular pillars in the office lobby areas are clad with Veloglas fibre glass after resinous oil priming.

The modulation of ceilings is adjusted to the building's structural module and its façade cladding to facilitate subsequent interior compartmentalization.

The false ceilings projected for the building are basically of two types, adapted to the module of the building's structure and its façade cladding: false ceilings of smooth plasterboard in auxiliary spaces or at meeting points, false ceilings of steel plates in the offices.

In the offices, the false ceilings are 55 cm below the floors. They can be dismantled and are formed by painted perforated steel plates of 1,300 x 240 mm, with fibreglass insulation, with concealed sections and respective elements for finishing and fastening. The false ceiling includes luminaires, fire detectors, sprinklers, speakers, grills for air conditioning and emergencies.

The entire area destined for offices has false floors (also known as access floors). In this way we guarantee the total functional flexibility of the areas to be used as offices. They will have a modular technical floor raised by 20 cm and made of DM agglomerate tiles glued onto a Donn galvanized steel plate frame 650 x 650 and 32 mm thick, on steel supports protected against corrosion.

Generally speaking, in the common areas of traffic inside the building, the floor will be of polished black granite with a skirting of the same material, on a built-up edge to facilitate installations passing and so that it is level with the false floors in the offices and auxiliary spaces.

The floors in the storerooms and services areas on office floors were made with stonker tiles.

The emergency staircases will be entire steps made of pebbledash-style terrazzo.

In the basements, resin-type continuous paving is generally foreseen, on a concrete floor or slabs with a monolithic finish. The garage spaces will be indicated by lines 10 cm in width and by numbering on the walls in chlorinated rubber paint.

Three lifts for the garage service from basement 6 to the ground floor, each with a capacity for 10 people and a speed of 1 m/sec.

Eight lifts, each with a capacity for 21 people (1,600 kg) and a speed of 6 m/sec.

A general service lift with a capacity of 4,200 kg.

Two emergency lifts each with a capacity for 13 people (1,000 kg) and a speed of 4 m/sec., one of them used as a service lift for the offices.

Low-speed variable volume system, with different treatment for the façade and interior, with centralized production of cold air and hot-water battery in the terminal units.

Given the form of the building, the air-conditioning system is divided into three treatment subsystems (one for each segment of the floor plan).

Coolers and heat pumps, frigorific power: 5,404 kW
Independent units, frigorific power: 389 kW
Thermal stations, calorific power: 2,815 kW

Air-conditioners, flow of pumped air: 904,200 m³/h
Air-conditioners, minimum flow of outside air: 376,200 m³/h
Air-conditioners, maximum flow of outside air: 904,200 m³/h

In variable air volume air-conditioners, a humidification system is required with isothermal-type humidifiers through independent steam generators, which will be monitored through the Centralized Control's computer.

The humidification and dehumidification of the treated air which has to be carried out all year round will take place in the air-conditioners through the enthalpic energy recuperator, the humidification section and the cold and hot battery foreseen for each of them.

The elements which comprise the Centralized Management System are:

• Control centre
• Distributed controllers
• Field elements: sensors, damper activators, motorized valves, etc.
• Electrical lines and communications with
  their connections
• Boards for housing the controls and regulators of air-conditioning terminal units and their electro-mechanical protection.

Summer interior conditions:

• Summer temperature: 23-25 ºC
• Summer relative humidity: 40-60%

Winter interior conditions:

• Winter temperature: 21-23 ºC
• Winter relative humidity: 40-50%

Cabling under access floors for power through metal plates.

Lighting in ceilings through fluorescent strip luminaire with an aluminium diffuser and electronic reactance, fitted in the false ceiling, to achieve an average luminic level of 500 lux.

Electricity supply is guaranteed by medium-voltage double feed at 20 KV. The power foreseen for each part of the building is 4,382 kW for the hotel, 393 kW for the garage and 2,765 kW for communal areas and offices. Emergency supply will be provided by power generators (2,000 KVA for the offices, 2,000 KVA for the hotel and 400 KVA for the garage).

Distribution lines start from the General Sectioning Centre which will feed the three parts of the building: garage, hotel and communal areas-offices.

The transformer substation for the hotel is located in basement 2. The source and metering point for internal switched loops for the rest of the transformer substations for the communal areas and offices is located on the building's upper technical level (N51).

The equipment for metering each subscriber's consumption (garage-car parks, hotel and communal areas-offices) is located in basement 2, in their respective transformer substations. These substations will be equipped with a telephone line so that the electricity supplier has the possibility of telemetering.

Sockets for DTTV, AM and FM radio, telephony and optic fibre network on the floors.

Ducting under the access floor through metal plates for the four existing operators.

Network covering cell phones for the four existing operators.

The power supply networks for the different communications operators come into the building through the entrance gallery situated on the west inside road, on basement 3.

From this point the ducting continues, to link up with the main meters and interconnection points, situated in the lower telecommunications zone in basement 2, where the different operators' basic telephony + ISND and cable telecommunications converge, and where the building's common telecommunications infrastructure is also found.

The connections consist of a set of 12 rigid plastic tubes 110 mm in diameter, to be distributed as follows:

• 4 ducts for basic telephony
• 4 ducts for ISND
• 2 ducts for cable telecommunications
• 2 ducts in reserve

Access control in reception for the offices through a turnstile with a proximity card.
Access control for vehicles though an entry barrier with a proximity card.
Security cameras (CCTV) in the garage and lift hall 

The garage and office floors will have the following devices:

• 
  
• Automatic detection and alarm systems.
• Automatic extinction systems (sprinklers).
• Fire hydrant system.
• Dry and wet upright.
• Fire extinguishers.

The building is equipped to manage and monitor the functioning of all the facilities mentioned in a centralized manner, and to conduct the control and maintenance of them all.

A forced ventilation system is used, for an air flow equivalent to 7 renov/hour.