02 precast concrete panels

Session 2Precast Concrete Façades

2.1. Classification2.2. Concrete panels (one layer)2.3. Concrete sandwich panels2.4. Design, manufacturing and installation2.5. Case studies2.6. Blibliography

Based on the original presentations by Prof. Luis Beltrán - luisfelipe.beltran@upm.es

Adapted by Prof. Julián GarcíaTranslated by Luis M. Martín

Torre Getesa Chamartín Madrid. Bunch ArqtConst. FCC, Prefabricación Prehorquisa

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2.1. Classification

PrefabricatedFaçades

ConcreteSystems

LightSystems

Loadbearing Concrete Panels

Non Loadbearing Systems

Non Loadbearing Systems

One layerConcrete Panel

SandwichConcrete Panel

One layerConcrete Panel

SandwichConcrete Panel

GFRC/GRC

GRP

Metal Façade Panel

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2.2. Concrete panels (one layer)· Materials.

Concrete. Ha-25,30,35. Aggregate<15 mm. Steel. B500T welded mesh, 5 to 10 mm diameter. Reinforcements on edges and corners.

· Standard measures (Size limits given by the load capacity of the available machinery: <1000 kg standard tower crane; <5000 kg mobile crane)

Thickness > 12 cm in structural panels. 8- 12 m in non-load bearing panels.Height < 3.50 m normal truck; < 4.00 m

truck loader. Length < 13.50 m normal truck

· As an example, a 8cm thick panel would weight 200 kg / m2. Considering a 3, 50 m. height and a 5,00 m. length, the total weight would be 3.50 x 5.00 x 200 kg / m2 = 3.500 kg

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2.3. Concrete sandwich panels· Same materials, but including an insulations, usually extruded polystyrene.· Standard measures

Thickness 6+10+6 (300kg/m2).Height around 2,00mLength 3,00 to 10,00m

· Total weight would be 1.800 to 6.000 kg/unit

www.precastpaneldetailing.com

SEIS. Manufacturing processes

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2.4. Design, manufacturing and installation· Design

Modulation · Manufacturing

Formwork Reinforcement Concrete (pouring, vibrating, curing, striking formwork)Superficial treatmentsStorage

· Installation Assembly and anchorage Joint treatment

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Manufacturing – Reinforcement· Welded steel mesh placed in the center of the piece, with reinforced edges and corners.· Steel plates for anchoring.· Steel connectors for demolding and assembling elevation

Reinforcement separators. Steel plates for anchoring. Steel connection for elevation.

Photo: LB

Different textures

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Manufacturing – From formwork to finishing· Steel formwork with external vibrators· Use of release agents that do not affect concrete texture or color· Textures imitating stone, timber, etc.

CS Leganés ProjectArq. Arderíus, Beltrán, 2003

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Design goals· Modulation and repetition· Standard families of similar elements, based on slight variations on the same mould· Size limits given by the load capacity of the available machinery

Installation anchoring.

Photos: FrimedaErection process. Photos:

Prehorquisa

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Installation· Transport & elevation

Installation· Standard connection

Bearing Connection - Steel section

Embed plate

Concrete floor

Flexible Connection – Steel section

Hilti HSA-K for connection

Weldedconnection

W1

W2

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Joints· Sealing · Durability · Aesthetics · False joints

A sealed joint. Photo: LB

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Details: buildingscience.com

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Details: buildingscience.com

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Other systems· Sandwich panels

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Details: buildingscience.com

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Other systems· Precast concrete panels with inner frame

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2.5. Case studies· 131 viviendas en Oviedo. Arch. Aranguren y Gallegos. Prefabricados Prehorquisa

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Case studies· DAH Library, Pasadena California, Arqt W.Macdonouh, House & Robertson, 2009. Photo M. Beltrán.

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Case studies· DAH Library, Pasadena California, Arqt W.Macdo- nouh, House & Robertson, 2009. Photo M. Beltrán.

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Case studies· 101 viviendas en Alcorcón. Arch. Ángel Fernández Alba. Prefabricados Prehorquisa

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Case studies· 72 viviendas en C. Real. Arch. Rojo y Fernández. Prefabricados Prehorquisa

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Case studies· Edif. C. de Salud en Valladolid. Arch. Arderíus, Beltrán. Constructora Ferrovial

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Case studies· C. Salud y Especialidades en Leganés Arq. Beltrán, Cabrejas, Arderíus. Escultor J. Vaquero Turcios. Constructora OHL. Prefabricados Indagsa

02. Precast Concrete Façades p.29

2.6. Bibliography

Deplazes, A (Ed.) (2009) Constructing Architecture. Materials, processes, structures. Birkhäuser, BaselHerzog, T. et al (2004) Facade Construction Manual. Birkhäuser, BaselKnaack, U.; Klein, T.; Bilow, M.; Auer, T. (2007) Façades. Principles of Construction. Birkhäuser, BaselPoirazis, H. (2004) Double Skin Façades for Office Buildings. Division of Energy and Building Design. Department of Construction and Architecture. Lund Institute of Technology. Lund University.Reichel, A. (2007) Open-Close. Windows, Doors, Filters. Birkhäuser, Basel

Spanish regulations:CTE DB HE, Ahorro de energíaCTE BD SU, Seguridad de utilizaciónCTE DB SI, Seguridad de incendioCTE DB HS, Salubridad