Peris+Toral Arquitectes’s 85 Social Dwellings in Cornellà is Spain’s largest wood-structure residential constructing. Its facade of metal-screened terraces lifts off the bottom, suspended by a sequence of columns. The Spanish agency received the undertaking by a 2017 competitors organized by the Àrea Metropolitana de Barcelona and supported by El Instituto Metropolitano de Promoción de Suelo y Gestión Patrimonial (The Metropolitan Institute for the Land Promotion and Heritage Administration). Conscious of the hassle’s tight price range, Peris+Toral sought a design that maximized condo sizes whereas remaining value delicate.
The ten,000-square-meter (107,639-square-foot) constructing incorporates 114 equally sized squares per flooring, for a complete of 543 models. The constructing has no inside corridors; as a substitute, rooms are linked by an enfilade of openings and surrounded by a terrace on each the street- and interior-facing facades.
Circulation is facilitated by a courtyard, with a portico that’s opened to the road. The courtyard acts as a gathering area for residents, and offers entry to the staircases at every nook of the constructing. The staircases result in the inside terraces, the place residents can entry personal entrances to their condo.
On every flooring, 4 or 5 models are grouped collectively, organized to permit for cross air flow and twin orientation. Every unit incorporates 5 – 6 modules—for 2 or three bed room flats—organized round a central kitchen reasonably than linked by a hallway. This structure maximizes dwelling area and permitting residents extra management over how they prepare their flats.
The freestanding constructing was constructed out of 8,300 sq. meters (91,493 sq. ft) of zero kilometer wooden handled domestically within the Basque Nation. The wooden framing was bolstered by a bolstered concrete construction on the bottom stage, which incorporates shops and public amenities. Using wooden additionally allowed for an industrialized manufacturing course of, which improved high quality management and decreased carbon dioxide emissions. By setting up 0.24 cubic meters (8.47 cubic ft) of wooden per sq. meter of constructed space, the design group was capable of decrease prices—essential for a social housing undertaking. Pilotis open the bottom flooring to the road, accommodating not solely the shops, however permitting for extra clear entry to the courtyard.
Peris+Toral co-founder José Toral mentioned that the facade was designed to “account [for] photo voltaic safety in summer season from the Mediterranean local weather,” with “fastened textile solar safety utilized in entrance of the opaque elements of the façade and wood curler shutters in entrance of the home windows.” Gentle-colored pavement additionally reduces the constructing’s warmth absorption. Toral mentioned these two pure cooling strategies account for a complete discount of two to a few levels celsius in summer season months.
Steel mesh railings on the facade—manufactured by Bianchini Ingeniero S.A. utilizing an electro-welding course of—was wanted to maintain prices at a minimal. With 3,500 sq. meters of railings and fences, Toral mentioned that electro-welding decreased prices by 33% in comparison with manually welding railings and bars. Peris+Toral had labored with Bianchini Ingeniero S.A. on a twisted mesh steel undertaking 5 years prior, and mentioned that it was important to have a producer who can be concerned within the undertaking.
The profiled sheet steel on the outside of the housing models provides the facade a extra inflexible look whereas utilizing a minimal quantity of fabric, and its white coloration additional prevents warmth achieve in the summertime. The structural Basque wooden was left uncovered on ceilings—together with on the terraces—to manage humidity. Screens on the terrace present photo voltaic shading and an middleman area between the inside and the road for residents.
Toral famous that “the development technique of the facade was designed in order that all the pieces may very well be assembled from the within with out the necessity for scaffolding,” and the railing fastening system was designed to be much like that of a low-cost curtain wall. Regardless of working inside tight budgets, the ensuing array of screened terraces current a clear metallic look, moderated by wooden on the shutters and uncovered ceiling.