Abstract: A concrete-reinforcement bar, especially a tension bar, provided with hot-rolled, helically-arranged ribs, which are located on two mutually-facing sides of the periphery of the bar and form parts of a thread. The ribs of the thread extend over roughly a third of the periphery of the bar and are inclined toward one another with their front faces which merge into the smooth bar surface of the core cross section. In order to improve the fatigue strength, and mechanical strength, and to simplify the production of the threaded bars and reduce the required tolerances, the cross-section of the bar has a regular, smooth undulating profile in an axial plane in the region of each rib (2); the wave-shaped tops of the ribs and the valleys between the ribs thus form cavities in the otherwise circular core cross-section. The cavities penetrate into the core cross-section only at localized points.

Abstract: A cable for structures, especially suspension bridges, has a plurality of bundled tension elements spacedly surrounded by a tubular sheath, the space between tension elements and sheath being filled with a material, preferably injected mortar. To reduce the cost of producing, transporting and assembling such a cable, the tubular sheath is formed at the worksite from at least one sheet-steel strip in a shaping and seaming station and progressed along already tensioned tension elements, then sealed against anchorings for the cable, and filled with the mortar under pressure.

Abstract: A tension-band bridge having one or more main openings (2) and possibly subsidiary openings (3), comprises a tension band (4) gripped between abutments (5) and possibly taken over supporting pillars (6). The traffic route over the bridge is disposed on a saddling (7), which bends in the longitudinal direction of the bridge, in the region of the main openings (2), while the tension band (4) can be travelled over directly in the region of any subsidiary openings (3) which may be present. The saddling which bends in the longitudinal direction of the bridge preferably consists of a latticework construction (10, 11, 12) which is rigid in the transverse direction of the tension band (4) and which is connected, in the longitudinal direction of the bridge, by means of diagonal struts (13) in each of which shock absorbers (14) are disposed.

Abstract: A hollow reinforced concrete sphere can be used as a container for transporting compressed gas, such as natural gas. Such containers can be interconnected and towed from one place to another by an ocean-going tugboat. Each container is formed with three band-like groups of reinforcing rings. Each group has its reinforcing rings disposed at right angles to the reinforcing rings in the other groups. The inner and outer surfaces of the container walls can be covered with a desired coating. In constructing the containers, they can be built at the water's edge and then rolled into the water.

Abstract: A flowable concrete mixture which possesses high strength and which provides facile placement of the mixture in structural forms composed of cement glue and aggregates, the viscosity of the cement glue and volume weight of the aggregates being adjusted so that the aggregates are suspended in the cement glue and remain suspended until the cement glue hardens.

Abstract: Floating platforms for various offshore facilities are formed of float members monolithically connected to a superposed platform. The float members are spherically shaped and are formed of reinforced or prestressed concrete. The platform can be a hollow planar member or it can be curved in one or two directions, and the platforms are formed of prestressed concrete. Cylindrical shafts can be used to connect the spherically shaped floats and the platform. Individual floating platforms can be connected by expansion joints and used as a runway. The float members can be constructed at the shoreline, launched into the water and held in a regular pattern while decked over with the platform. After completion of the construction procedure, the floating platform can be moved to an offshore location for use.

Abstract: Containers for storing crude oil or other liquids at offshore locations are formed preferably of reinforced concrete, though prestressed concrete can be used. The containers can be floated into position and sunk onto the ocean floor. Each container is bottle-shaped and consists of a lower storage section and an upper or neck section. The lower section is located below water and the neck section extends upwardly to a point above the water level. The maximum diameter of the lower section is considerably greater than the maximum diameter of the upper section. A platform or platform section can be provided on the upper end of the upper section. A number of containers can be grouped together and interconnected at their upper ends by a platform.

Abstract: In the construction of a prestressed concrete structure, such as a bridge girder, forms for at least a part of the structure are built and a thin-walled sheathing tube is placed within the forms. Axially displaceable stiffener tubes extend through the sheathing tube. After the concrete is poured into the forms around the sheathing tube and sets, a steel bar is pushed through the sheathing tube and displaces the stiffener tubes. The steel bar can be left in the sheathing tube as the tendon or replaced with a tendon. Subsequently, the tendon is tensioned. Spacers encircling the steel bar keep it centered as it is pushed through the sheathing tube. Preferably, the stiffener tubes consist of an inner tube and an outer tube and each is made up of a plurality of short axially extending lengths with the joints of the inner tube staggered relative to the joints of the outer tube.

Abstract: A floating roadway assembly adapted to support road vehicles is formed from a plurality of pontoons consisting of concrete material and connected together by a plurality of elongated metal carrying rods which extend longitudinally through each of the pontoons to join them together to form the roadway. The rods are resistant to traction and pressure and the connection between the rods and each of the pontoons is made so as to enable relative movement therebetween longitudinally of the rods.

Abstract: There is disclosed a process for the production of a bridge girder system of prestressed concrete in sectional cantilever construction in which prefabricated sections comprising the whole superstructure cross-section formed as hollow boxes, are drawn tightly together in the longitudinal direction of the bridge to form a monolithically acting girder system, the process comprising the steps of arranging a plurality of bridge sections in succession in the longitudinal direction of the bridge, assembling said sections to form a set, said set of sections having been simultaneously prefabricated while separating the surfaces which are to be turned toward one another (in the subsequent incorporation of the individual sections in the bridge structure) by steel sheets, and then moving the sections into position individually so that they are held solely by means of the frictional connection produced by the prestressing between their contacting surfaces.

Abstract: A float for the intermediate storage at sea of crude oil, liquefied gas and the like, is formed of a toroidal body of revolution having a vertical axis. The toroidal body consists of a bottom plate in a form of a shallow annular shaped dish closed across its top by a circular cover plate. Partitions divide the interior of the body into individual compartments. Extensions projecting radially outwardly from the circumferential pheriphery of the body form docking surfaces and can house driving engines for propelling or positioning the float.

Abstract: A monolithic ship's body is formed of a hull containing bulkhead partitions disposed in a hexagonal arrangement to form a grid symmetrical about the longitudinal axis of the hull. The partitions are formed integrally with the hull. The junction between the side walls and the bottom of the hull is curved. Further, the bottom of the hull also has a curved configuration transversely of the longitudinal axis providing alternating convex and concave surfaces so that the bottom acts a hollow arch. The deck is formed integrally with the hull and the bulkhead partitions and is curved transversely to the longitudinal axis with its upper surface being convex. Steel concrete or prestressed concrete can be used in forming the monolithic ship's body.

Abstract: A container for liquefied gas in which a vapor-tight sealing layer is placed on the inside of an outer layer of reinforced concrete. On the inside of the vapor-tight sealing layer, a heat insulating layer is deposited consisting of closed-cell synthetic resin foam.

Abstract: The tank ship is made of monolithic reinforced concrete and is formed with two symmetrical, longitudinal chambers for tanks, and an intermediate space for the operating mechanisms thereof. The massive reinforced concrete slabs which form the ship are reinforced partly by prestressed steel tendons and partly by mild (non-stressed) steel rods. The prestressed tendons running lengthwise of the ship are unspliced. The transverse bulkheads forming the ends of the tanks are curved in two directions, e.g. in the form of sections of hemispheres. Insulation is provided on the interior surface of the tank chambers and on both sides of the bulkheads.