hollow-core construction

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• Hollow-core slab — A hollow core slab , also known as a voided slab ( de. Hohlkörperplatte, nl. Kanaalplaat or Welfsel, sv. hålplatta, fi. ontelolaatta) is a prefabricated slab of prestressed concrete typically used in the construction of floors in multi story… …   Wikipedia

• building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …   Universalium

• Magnetic core — A magnetic core is a piece of magnetic material with a high permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, inductors and magnetic …   Wikipedia

• Egyptian pyramid construction techniques — There have been many hypotheses about the Egyptian pyramid construction techniques. The construction techniques seem to have developed over time; the earliest pyramids were built in different ways than later ones. Most of the construction… …   Wikipedia

• arts, East Asian — Introduction       music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature.       Some studies of East Asia… …   Universalium

• Door — For other uses, see Door (disambiguation). A door is a movable structure used to open and close off an entrance, typically consisting of a panel that swings on hinges or that slides or rotates inside of a space. When open, they admit ventilation… …   Wikipedia

• Voided biaxial slab — Voided biaxial slabs are reinforced concrete slabs in which voids reduce the amount of concrete.While concrete have been used for thousands of years, the use of reinforced concrete is a relative recent invention, usually attributed to Joseph… …   Wikipedia

• Photonic-crystal fiber — (PCF) is a new class of optical fiber based on the properties of photonic crystals. Because of its ability to confine light in hollow cores or with confinement characteristics not possible in conventional optical fiber, PCF is now finding… …   Wikipedia

• Legacy Foundation — provides training, technology and media services for biomass fuel briquette production, environmental conservation and income generation throughout the world. External links* [http://www.legacyfound.org/ Official site] LEGACY FOUNDATION: THE… …   Wikipedia

• Drilling rig — For a detailed diagram of a Petroleum drilling rig, see List of components of oil drilling rigs. Drilling rig preparing rock blasting …   Wikipedia

• Concrete — This article is about the construction material. For other uses, see Concrete (disambiguation). Outer view of the Roman Pantheon, still the largest unreinforced solid concrete dome.[1] …   Wikipedia