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CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is the U.S. National Phase of PCT/DK2012/050384 filed Oct. 12, 2012, which claims priority of Danish Patent Application PA 2011 000847 filed Nov. 2, 2011. 
     FIELD OF THE INVENTION 
     The present invention relates to a construction-unit as a solution to the problem of resettlement of displaced or poor populations. 
     BACKGROUND OF THE INVENTION 
     One of the most pressing worldwide problems, with regards to construction, is the widespread shortage of family housing in poor countries. 
     Natural disasters have repeatedly contributed to declining conditions for many already poor populations. Development of a housing construction method that is fast, efficient and appropriate is, therefore, of great importance. 
     SUMMARY OF THE INVENTION 
     With the previously described background in mind, it is a huge advantage that the homes being built for house disaster victims are well insulated and cost-efficient as regards the used materials. Designing these dwellings to withstand future natural disasters is critical. 
     The simplicity of the light-weight constructing method involves the recipients and demands only very simple instructions. 
     The production process can take place locally in order to involve local entrepreneurs and help local economic growth. 
     The proposed solution can have particular relevance in cold and inaccessible territories and can also be very suitable for use in areas threatened by earthquakes or in those areas where wood and steel are in short supply. 
     The present invention relates to a construction-unit that is adapted for being combined with one more similar unit to constitute a self-carrying structure to use for shelter or dwelling wherein each construction-unit make up for both one sidewall and half a roof in one segment. 
     The units may be shaped as half an arch and can be joined with a similar unit to make a whole self-carrying shelter. 
     The shelter can, in an emergency situation, be used as a temporary or transitional insulating shelter. 
     Due to its light weight the shelter can easily be transported to another location to be placed on a plinth to be used as the primary part of the building envelope of a permanent house. 
     BRIEF DESCRIPTION OF THE INVENTION 
     The unique aims for the invention are to avoid transitional waste and to avoid future slum. 
     Too many shelter solutions consist of emergency tents or transitional housing materials that turn into waste after a relatively short life. The invention is both economically and environmentally attractive as they can be reused for permanent dwellings. 
     The concept inspires housing construction method away from the typical corrugated iron-sheeted roof-structures that architecturally defines slum. By integrating local materials such as clay or lime-stone, it is possible to plaster the shelter until it has a more permanent solid structure. 
     The present invention relates to a construction-unit that is adapted for being combined with one more similar unit to constitute a self-carrying structure to use for shelter or dwelling wherein each construction-unit make up for both one sidewall and half a roof in one segment and where the weight is less than 75 kg. The self-carrying structure can be obtained by placing the two similar units rotated 180 degrees relative to each other in a horizontal plane and making them face each other at their top. This means that when two construction-units are joined they can transfer static and dynamic loads to the base. A limited weight makes it easy to handle without machinery. 
     In an embodiment of the invention the weight is less than 60 kg. 
     In an embodiment of the invention the weight is less than 50 kg. 
     In an embodiment of the invention the weight is less than 25 kg. 
     In an embodiment of the invention the weight is less than 20 kg. 
     In an embodiment of the invention the weight is less than 15 kg. 
     In an embodiment of the invention at least 30% of the volume consists of polymer. The use of polymer can in an expanded version secure a low weight in relation to the volume which is an advantage when handling the construction-units. Expanded polymer also secure a high insulating effect in order to obtain a warm indoor climate when used for housing. Polymer can in a harder version give a high strength. 
     In an embodiment of the invention at least 40% of the volume consists of polymer. 
     In an embodiment of the invention at least 60% of the volume consists of polymer. 
     In an embodiment of the invention at least 80% of the volume consists of polymer. 
     In an embodiment of the invention at least 90% of the volume consists of polymer. 
     In an embodiment of the invention the main constituent is a material-composition based on polymers such as polyurethane or polystyrene. The fabrication of construction-units of polyurethane is basically a process of mixing the two-part composite and filling the mixed liquid into a separable mold right after mixing it. This solution demands certain procedures of production that relates to security of handling Polyurethane. It is important to make the mold able to stand up to the forces within the expanding polyurethane. In an embodiment of the invention the material-composition may include or be based on other organic or synthetic materials. 
     In an embodiment of the invention the main constituent is a cement-based material-composition such as polystyrene concrete or aerated concrete. This combination can make the unit insulating towards cold, heat or sound. The combination of materials can contribute to making the unit light in weight and thereby possibly manageable with only manpower and without machinery. If using expanded polystyrene with cement a buoyancy-restricting additive is added to the polystyrene to prevent it from seeking towards the top in the unhardened mixture. The material-composition may include clay, mud, dirt, limestone, chalk or ash combined with other organic or synthetic materials. In an embodiment of the invention there are multiple horizontal holes in the longitudinal direction of the construction-unit for ventilating the unit to avoid problems caused by moisture. 
     In an embodiment of the invention the thickness of the construction-unit may be between 10 mm and 600 mm. 
     In an embodiment of the invention the thickness of the construction-unit may be between 10 mm and 400 mm. 
     In an embodiment of the invention the thickness of the construction-unit may be between 10 mm and 200 mm. 
     In an embodiment of the invention the thickness of the construction-unit may be between 10 mm and 100 mm. 
     In an embodiment of the invention the thickness of the construction-unit may be between 1 mm and 50 mm. 
     In an embodiment of the invention the construction-unit is adapted for being assembled with a similar construction-unit in a direction perpendicular to the span of the self-carrying structure in a horizontal plane by having tongue or groove or by using an assembling-unit that fits into holes, grooves or dents in the side of the construction-units that has contact after being assembled. 
     In an embodiment of the invention the construction-unit is adapted for being assembled and tightened together with multiple similar construction-units by leading tension-bars through precast horizontal holes in the construction-units. When a desired number of units have been assembled the units can be tautened by making threads at the end of the previously described tension-bars and fasten with nuts and washers. 
     In an aspect of the invention the static functional shaping of the construction-unit when in use is related to a curved design in the direction where two construction-units form a span when they are combined to constitute a self-carrying structure and in relation to that direction form a linear design in the perpendicular direction in a horizontal plane when placed as a part of an assembled shelter. 
     In an aspect of the invention the upright position of the construction-unit is obtained when in use by connecting it with a similar construction-unit at their top by letting a groove in the top of the construction-units enclose a pole, a pipe or a band or by fitting into a profile-beam. 
     In an aspect of the invention the horizontal static forces at the lowest part of the construction-unit in the direction where two construction-units form a span when they are combined to constitute a self-carrying structure can be adapted by a frame or a band that is both able to fix the lowest part of the construction-unit and is also able to be fixed on to a foundation, plinth or a wall. Alternatively the construction-units can be placed and possibly there is made a tongue on the top of the plinth to fit into a groove in the bottom of the construction-units. Another way to absorb horizontal forces is to connect supports in the transverse direction by for either bars, wires, rafters or poles. 
     In an aspect of the invention the horizontal static forces, at the top of the construction-unit in the direction of the span of the self-carrying, can be adapted by connecting the two similar construction-units with a rope or a steel wire that is twisted around a tension-bar running through holes in the construction-units. 
     In an aspect of the invention the horizontal static forces, at the top of the construction-unit in the direction of the span of the self-carrying, can be adapted by connecting the two similar construction-units with a plate consisting of metal or polymer placed right under a top-tube and provided with holes that secure passage of the tension-bar running through holes in the construction-units. 
     In an aspect of the invention the stability can be increased by a stabilizing wall placed in the direction where two construction-units form a span when they are combined to constitute a self-carrying structure. 
     In an aspect of the invention the stability can be increased by a stabilizing wall placed in the direction where two construction-units form a span when they are combined to constitute a self-carrying structure and fixed with a band that grabs the wall and fix the wall between the construction-units at the same time. 
     In an aspect of the invention where it is possible to place the wall under the assembled shelter at any desired connection between the construction-units. 
     In an aspect of the invention the wall has the same material-composition as the construction-unit. 
     In an aspect of the invention the wall consists of multiple wall-units that can be assembled by having tongue or groove or by using an assembling-unit that fits into holes, grooves or dents in the side of the wall-units that has contact after being assembled. 
     In an aspect of the invention it relates to the use of a plurality of construction-units as described above for constructing a static functional self-carrying structure the shape which has a curved design related to the mathematical expression The Hyperbolic Cosine or part of an Ellipse in the transverse direction and a linear design in the longitudinal direction when placed as a part of an assembled shelter. The construction-unit can be designed as an optimal compression-arch that minimizes inner bending moments from evenly distributed static or dynamic loads. A version of the construction-unit refers to the shape of a hanging chain rotated 180 degrees in a vertical plane. The unit can have a varying curvature with a decreasing radius in the vertical plane towards its top. Another version of the construction-unit could be shaped angular, circular, elliptic or with another variation of curvature 
     In an aspect of the invention the self-carrying structure to be used for shelter or dwelling which structure comprises two or more construction-units. 
     In an aspect of the invention a self-carrying structure according to any of the preceding claims, which structure is placed on a foundation, plinth or a wall to be part of a permanent construction or dwelling. If the construction-units are placed on a plinth, the units can be secured to the base by tightening steel straps that may be cast into the plinth or mounted later. The plinth can be designed as a composition of multiple layers or as a one material-composition. The permanent structure must in all cases be able to obtain and transfer static and dynamic loads to the ground according to applicable regulations. 
     In an aspect of the invention the top of the wall has a ventilation-unit. The ventilation-unit can turn out very convenient in certain climate condition. Ventilation of the construction can be obtained by leaving holes in the top of the end-walls secured with insect net. The holes for ventilation in the end-walls could be either functioning as natural or mechanical ventilation. 
     In an aspect of the invention the connection between the construction-units is supported by a beam of steel, metal, cement or polymer. 
     In an aspect of the invention the construction-units are tightened together in the direction perpendicular to the span of the self-carrying structure in a horizontal plane by rope, wire or tension bars going from one end to the other in same direction. 
     In an aspect of the invention the construction-units are tightened together by rope or wire going from an end piece one end made from either wood, cement, metal or polymer to a similar end-piece in the other end of the shelter. 
     In an aspect of the invention the wire or rope used for tightening the construction-units towards each other is hidden within holes inside the construction-units. 
     In an aspect of the invention is used as a part of a cabin for sanitary installation such as toilets, latrines, zincs or baths. 
     In an aspect of the invention it is used for storage of for example food or medicine. 
     In an aspect of the invention the assembled structure is covered with roofing felt, metal sheeting or a cloth containing cement. 
     In an aspect of the invention the assembled structure is covered with a tarpaulin and possibly secured on both sides with sand, stones or sandbags placed on the tarpaulin or by a tension band secured to the ground. The self-carrying structure can provide immediate shelter. For a temporary immediate version of the shelter the loads can be led to the supports by for example fixing the whole assembled shelter by wrapping it with tarpaulins and fixing these with sandbags that are put on the outside to secure both vertical and horizontal movements. The construction can be water-tightened by adding waterproof coating, tape or cover onto the surface of the outside of the structure. The construction could also have a separate waterproof cover that might be placed with a little distance from the surface of the construction. 
     In an aspect of the invention, the top of the stabilizing wall has a ventilation-unit. 
     In an aspect of the invention, the ventilation-unit comprises a solid frame, which is formed to follow a curve of the construction-units from which the self-carrying structure is composed. 
     In an aspect of the invention the structure normally made from two construction-units is created integrally in one unit that makes up for both two side-walls and one roof. 
    
    
     
       LIST OF DRAWINGS 
       In the following, a few embodiments of the invention are described and explained with more details with reference to the drawing, where 
         FIG. 1  illustrates a three-dimensional view of the assembled construction in a version consisting of sixteen construction-units in order to indicate the longitudinal and the transverse direction of the construction placed as when in use, 
         FIG. 2  illustrates a cross-section in a vertical plane in the transverse direction of a construction-unit, 
         FIG. 3  illustrates a cross-section in an arbitrary plane in the longitudinal direction and perpendicular to a tangent of the curve of a construction-unit, 
         FIG. 4  illustrates a three-dimensional view of a construction-unit from a chosen viewpoint where the position of the construction-unit is turned 0 degrees in a horizontal plane, 
         FIG. 5  illustrates a three-dimensional view of a construction-unit from a chosen viewpoint where the position of the construction-unit is turned 90 degrees in a horizontal plane, 
         FIG. 6  illustrates a three-dimensional view of a construction-unit from a chosen viewpoint where the position of the construction-unit is turned 180 degrees in a horizontal plane, 
         FIG. 7  illustrates a three-dimensional view of a construction-unit from a chosen viewpoint where the position of the construction-unit is turned 270 degrees in a horizontal plane, 
         FIG. 8  illustrates a three-dimensional view of two similar construction-units joined in the longitudinal direction, 
         FIG. 9  illustrates a three-dimensional view of two similar construction-units that have been joined in order to assemble them in the longitudinal direction, 
         FIG. 10  illustrates a three-dimensional view of two similar construction-units being put together in the transverse direction, 
         FIG. 11  illustrates a three-dimensional view of two similar construction-units joined in the transverse direction, 
         FIG. 12  illustrates a three-dimensional view of a construction-unit that reveals the one of two parts of an assembling-method, 
         FIG. 13  illustrates a three-dimensional view of a construction-unit that reveals the second of two parts of an assembling-method, 
         FIG. 14  illustrates a three-dimensional view of two units being brought together to connect by a possible assembling method, 
         FIG. 15  illustrates a three-dimensional view of multiple construction-units connected by the possible assembling method, 
         FIG. 16  illustrates a three-dimensional view of how multiple construction-units are added the opportunity to be tightened together in the longitudinal direction by putting tension-bars through the holes precast in the construction-units, 
         FIG. 17  illustrates a three-dimensional view of how a version of multiple construction-units can be tightened together in the longitudinal direction, 
         FIG. 18  illustrates a cutout part the of top of the cross-section shown on  FIG. 1  that reveals a possible solution of composite layers of the construction unit, 
         FIG. 19  illustrates a cutout part the of top of the cross-section that reveals a possible solution of composite layers of the construction-unit, 
         FIG. 20  illustrates a band that is able to makes a hidden fixed connection between the construction-units and a wall put up in the transverse direction of the shelter, 
         FIG. 21  illustrates a band that is connected into the grooves of a wall put up in the transverse direction of the shelter, 
         FIG. 22  illustrates how tour basic parts makes it possible to make a hidden fixed connection between the wall and the construction-units, 
         FIG. 23  illustrates how it is possible to make a hidden fixed connection between the wall and the construction-units, 
         FIG. 24  illustrates how it is possible to make a hidden fixed connection between the wall and the construction-units, 
         FIG. 25  illustrates a three-dimensional view of two similar construction-units being able to join in the longitudinal direction by enclosing a series of assembling units, 
         FIG. 26  illustrates a three-dimensional view of two similar construction-units joined in the longitudinal direction by enclosing a series of assembling units, 
         FIG. 27  illustrates a three-dimensional view of two similar construction-units being able to join in the longitudinal direction by enclosing an assembling unit, 
         FIG. 28  illustrates a three-dimensional view of two similar construction-units joined in the longitudinal direction by enclosing an assembling unit leaving only a part of the assembling-unit visible, 
         FIG. 29  illustrates a three-dimensional view of the three separate parts that becomes an assembling unit when joined, 
         FIG. 30  illustrates a three-dimensional view of the three separate parts that has been joined to become an assembling unit, 
         FIG. 31  illustrates a three-dimensional view of a series of assembling-units attached to a construction-unit its holes going in the longitudinal direction, 
         FIG. 32  illustrates a profile-band with a raised mid-section that can be used for fixing the construction-unit in the horizontal transverse direction of the shelter, 
         FIG. 33  illustrates an assembling of a profile-band and a construction-unit, 
         FIG. 34  illustrates a series of construction-units assembled as a shelter placed on a frame of profile-bands leaving only the profile-band in the transverse direction visible, 
         FIG. 35  illustrates a series of construction-units assembled as a shelter placed raised from a frame, 
         FIG. 36  illustrates how the profile-band in transverse direction enfolds the profile-band going in the longitudinal direction, 
         FIG. 37  illustrates an alternative version of the profile-band, 
         FIG. 38  illustrates an alternative version of the profile-band, 
         FIG. 39  illustrates how a series of construction-units are ended in the longitudinal direction, 
         FIG. 40  illustrates how a series of construction-units are ended in the longitudinal direction by an end-piece that fits the shape of the construction-unit after being assembled, 
         FIG. 41  illustrates how a series of construction-units are ended in the longitudinal direction, 
         FIG. 42  illustrates how a series of construction-units are ended with an end-piece leaving a closed nut visible, 
         FIG. 43  illustrates how a series of construction-units are ended with end-pieces can be added a wall going in the transverse direction at the end of the shelter, 
         FIG. 44  illustrates how a series of construction-units are ended with end-pieces can be added a wall going in the transverse direction recessed from the end of the shelter, 
         FIG. 45  illustrates the three wall-units separated to reveal how they are connected with a connection-unit that fits into horizontal holes in the wall-units, 
         FIG. 46  illustrates how the three wall-units are connected to become an assembled wall-unit, 
         FIG. 47  illustrates a wall-unit is placed on the profile-band placed in the transverse direction, 
         FIG. 48  illustrates a top-connector which is a plate with two holes that secure the passage of the tension-bars, 
         FIG. 49  illustrates a top-connector, which is a plate with two holes that secure the passage of the tension-bars, 
         FIG. 50  illustrates a top-connector, which is a plate with two holes assembled with two conic tubes, 
         FIG. 51  illustrates a top-connector, which is a plate with two holes assembled with two conic tubes, 
         FIG. 52  illustrates a shelter covered with a tarpaulin stretched in the transverse direction and secured to the ground by placing a series of sandbags on the end flaps of the tarpaulin, 
         FIG. 53  illustrates a shelter covered with a tarpaulin stretched in the transverse direction and a raised opening held up by poles and rope, 
         FIG. 54  illustrates a shelter placed on a base and covered with a tarpaulin stretched in the transverse direction, 
         FIG. 55  illustrates a shelter placed on an adjustable plinth and covered with a tarpaulin stretched in the transverse direction, 
         FIG. 56  illustrates a shelter placed on a floor tarpaulin and covered with a tarpaulin stretched in the transverse direction, 
         FIG. 57  illustrates three phases of transforming an immediate shelter into a more permanent structure, 
         FIG. 58  illustrates how a series of immediate shelters are integrated in the roof-structure in two-story terraced houses. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  illustrates a three-dimensional view of the assembled construction  40  in a possible version consisting of sixteen construction-units  23  in order to indicate the longitudinal direction  1  and the transverse direction  2  of the assembled shelter-construction  40  placed as when in use. The construction-units  23  can make a construction in any desired length by adding more construction-units  23 . 
       FIG. 2  illustrates a cross-section of a possible version of the invented construction-unit  23  in a vertical plane in the transverse direction  2  of the assembled construction. The cross-section reveals four following functional details: 
     First function revealed on  FIG. 2  is the curved design that is similar to a hanging chain turned 180 degrees in a vertical plane. Mathematically this is a Hyperbolic Cosine. This Hyperbolic Cosine gives an ideal compression-arch in order to lead evenly distributed load to the supports with minimal or no bending moments. 
     Second function revealed on  FIG. 2  is a groove  3  in the top of the construction-unit  23 . This is meant for enfolding  11  a pole or a tube  10  placed in longitudinal direction  1  perpendicular to the cross-section. The enfolding  11  is possible when assembling the unit with a similar unit facing each other at the top. This is illustrated on  FIG. 10  and  FIG. 11 . 
     Third function revealed on  FIG. 2  is one or more horizontal holes  4  meant to tighten multiple construction-units  23  together in the longitudinal direction  1  by leading a steel-bar  17  through and fastened with thread, washer  19  and nut  18 . This is illustrated on  FIG. 16  and  FIG. 17 . 
     Fourth function revealed on  FIG. 2  is the groove  5  at the bottom of the construction-unit suitable for fitting onto a tongue on top of the plinth or foundation. 
       FIG. 3  illustrates a cross-section in an arbitrary plane in the longitudinal direction  1  perpendicular to a tangent of the curve of a construction-unit  23 .  FIG. 3  reveals the tongue  6  and groove  7  that could be one of more possible ways to assemble the construction-units  23  continuously in the longitudinal direction  1  until the desired length is obtained. An alternative assembling method is illustrated on  FIG. 12  and  FIG. 13 . 
       FIG. 4  illustrates a three-dimensional view of a construction-unit  23  placed as in use from a chosen viewpoint where the position of the construction-unit  23 . 
       FIG. 5  illustrates a three-dimensional view of a construction-unit  23  placed as in use from a chosen viewpoint where the position of the construction-unit  23  is turned 90 degrees in a horizontal plane compared to the similar construction-unit  23  illustrated on  FIG. 4 . 
       FIG. 6  illustrates a three-dimensional view of a construction-unit  23  placed as in use from a chosen viewpoint where the position of the construction-unit  23  is turned 180 degrees in a horizontal plane compared to the similar construction-unit  23  illustrated on  FIG. 4 . 
       FIG. 7  illustrates a three-dimensional view of a construction-unit  23  placed as in use from a chosen viewpoint where the position of the construction-unit is turned 270 degrees in a horizontal plane compared to the similar construction-unit  23  illustrated on  FIG. 4 . 
       FIG. 8  illustrates a three-dimensional view of two similar construction-units  23  being put together in the longitudinal direction  1  while the arrows indicate the movement  8  of the construction-units  23  in order to assemble them in the longitudinal direction  1 . 
       FIG. 9  illustrates a three-dimensional view of two similar construction-units  23  that have been joined  9  in order to assemble them in the longitudinal direction  1 . 
       FIG. 10  illustrates a three-dimensional view of two similar construction-units  23  being put together in the transverse direction  2  while the arrows indicate the movement of the construction-units in order to assemble them in order to make shelter in a vertical plane in the transverse direction  2  by enclosing around a pole or a pipe  10  in the top with the groove  3  in the top of each of the two similar construction-units  23 . 
       FIG. 11  illustrates a three-dimensional view of two similar construction-units  23  put together  11  in the transverse direction  2  in order to make shelter in a transverse plane by enclosing around a pole or a pipe  10  in the top with the groove  3  in the top of each of the two similar construction-units  23 . 
       FIG. 12  illustrates a three-dimensional view of a construction-unit  23  that reveals the one of two parts of an assembling-method as an alternative to the “Tongue and Groove”-principle where the revealed detail shows a circular conic dent  12  in the side of the unit that is a possible substitute for a groove in relation to the “Tongue and Groove”-principle. 
       FIG. 13  illustrates a three-dimensional view of a construction-unit  23  that reveals the second of two parts of an assembling-method as an alternative to the “Tongue and Groove”-principle where the revealed detail shows a circular conic assembling-tongue  13  in the side of the unit that is a possible substitute for a groove or dent  12  in relation to the “Tongue and Groove”-principle. 
       FIG. 14  illustrates a three-dimensional view of two units that can be connected to each other by an assembling method for assembling the construction-units  23  in the longitudinal direction  1  based on a separate circular double-conic assembling-unit  14 . The assembling-unit  14  will transfer loads from one constriction-unit  23  to another in a vertical plane in the transverse direction  2 . When placed correctly the assembling-unit  14  may have a hole  24  in the middle in the longitudinal direction  1  giving the opportunity to put a tension-bar  17  through it. The assembling-unit  14  could comprise a groove  25  or a hole in order to help keeping the construction-units  23  together in the transverse direction  2 . This requires tension strings or bars  16  attached to the assembling-units  14  as illustrated on  FIG. 15 . The assembling unit  14  should fit into a version of the construction-unit  23  with multiple circular conic dents  15  on both sides as an alternative to tongue  6  and groove  7 . 
       FIG. 15  illustrates a three-dimensional view of multiple construction-units  23  connected by the assembling method from  FIG. 14 , which offers the opportunity to keep the assembling-units  23  connected in the transverse direction  2  by adding tension strings, wire or bars  16 . The strings, wire or bars  16  are supposed to fit into a groove  25  or a hole in assembling-units  14 . This makes it possible to connect and keep together the two sides of the construction around the pole  10  in the top of the construction. 
       FIG. 16  illustrates a three-dimensional view of how multiple construction-units  23  can be tightened together in the longitudinal direction  1  by putting tension-bars  17  through the holes  4  precast in the construction-units  23 . The tension-bars  17  are supposed to be put through the construction units  23  and through the centre of the assembling-units  14 . 
       FIG. 17  illustrates a three-dimensional view of how a plurality of construction-units  23  can be tightened together in the longitudinal direction  1  by finishing the tension-bars  17  from  FIG. 16  by cutting a thread and adding a washer  19  and a nut  18 . For a permanent construction the dents  15  could be plastered with cement and for a transitional construction the assembling could be covered with tarpaulins and fixed with sandbags. 
       FIG. 18  illustrates a cutout part the of top of the cross-section shown on  FIG. 1  that reveals a possible solution of composite layers of the construction-unit  23  where the main constituent  22  and core is cement-based material-composition like polystyrene concrete or aerated concrete. The next layer on both sides is a cement plaster  21  that is possibly closed with a waterproof  20  coating, plastering or casting on the outside. Surfaces are possibly added in a prefabrication process or possibly added when the units has been assembled to make the whole shelter. Reinforcement of possibly steel wire or net is added according to static recommendations. 
       FIG. 19  illustrates a cutout part the of top of the cross-section shown on  FIG. 1  that reveals a possible solution of composite layers of the construction-unit  23  where the main constituent  28  and core material is Expanded Polystyrene (EPS). The next layer on both sides is a cement-based plaster  26  that enfolds a reinforcement net of glass fibres. Surfaces are possibly added in a prefabrication process or possibly added when the units has been assembled to make the whole shelter  40 . Reinforcement of possibly made with steel wire or steel net, added according to static recommendations. Edges are protected by a band  27  that is glued to the edges of the construction-unit  23  before coating it. This band  27  is made of extruded plastic and has 3 basic functions. First function is protection of edges. 
     Second function is defining thickness of the coating. Third function is being a weather strip that holds back water and draught when the construction-units  23  are connected and tightened together. 
       FIG. 20  illustrates a band  32  that is able to makes a hidden fixed connection between the construction-units  23  and a wall  33  put up in the transverse direction  2  of the shelter. The band can be made of steel, metal or polymer. The band  32  can fix the wall  33  in both back and forth in the longitudinal direction  1  of the shelter with two rows of flaps  29 + 30  that are bended 90 degrees in proportion to the plate they are made from. The band  32  has a row of flaps  31  that are bend 180 degrees in proportion to the other flaps  29 + 30 . The parallel flaps  29 + 30  can fit into grooves  34  made in the wall units  33 . 
       FIG. 21  illustrates a band  32  that is connected into the grooves  34  of a wall  33  put up in the transverse direction  2  of the shelter. Only one row of flaps  31  are now exposed. Thereby it is able to be hidden in a fixed connection between the construction-units  23  and a the wall  33 . 
       FIG. 22  illustrates how tour basic parts makes it possible to make a hidden fixed connection between the wall  33  and the construction-units  23  seen from outside of the shelter. The band  32  is connected into the wall  33  put up in the transverse direction  2  of the shelter. By connecting the construction-units  23  it is now able to make a hidden and fixed connection between the construction-units  23  and the wall  33 . 
       FIG. 23  illustrates how it is possible to make a hidden fixed connection between the wall  33  and the construction-units  23  seen from inside of the shelter before assembled. The band  32  is connected into the wall  33  put up in the transverse direction  2  of the shelter. By connecting the construction-units  23  it is now able to make a hidden and fixed connection between the construction-units  23  and the wall  33 . 
       FIG. 24  illustrates how it is possible to make a hidden fixed connection between the wall  33  and the construction-units  23  seen from inside of the shelter after assembled. The band  32  from  FIG. 23  is no longer visible. 
       FIG. 25  illustrates a three-dimensional view of two similar construction-units  23  being able to join in the longitudinal direction by enclosing a series of assembling units  35 . 
       FIG. 26  illustrates a three-dimensional view of two similar construction-units  23  joined in the longitudinal direction by enclosing a series of assembling units  35 . 
       FIG. 27  illustrates a three-dimensional view of two similar construction-units  23  being able to join in the longitudinal direction by enclosing an assembling unit  35  by making it fit into the holes  4  in the construction-units. The view reveals the assembling unit  35  before joining the construction-units  23  in the longitudinal direction  1 . 
       FIG. 28  illustrates a three-dimensional view of two similar construction-units  23  joined in the longitudinal direction by enclosing an assembling unit  35  leaving only a part of the assembling-unit visible. The view reveals the part of the assembling unit  35  that makes it possible to hang something up after joining the two similar construction-units  23  in the longitudinal direction  1 . 
       FIG. 29  illustrates a three-dimensional view of the three separate parts that becomes an assembling unit  35  when joined. The first part that is included in the assembling unit  35  is a conic tube  36  that has an end  67  with a smaller diameter. The second part that is included in the assembling unit  35  is a conic tube  37  that has a dent  70  in one end that fits the end  67  of the other conic tube  36 . The third part  88  has a hole  68  that fits around the end  67  of the other conic tube  36 . Hole  69  makes it possible to hang something up inside the shelter after joining the two similar construction-units  23  in the longitudinal direction  1 . 
       FIG. 30  illustrates a three-dimensional view of the three separate parts that has been joined to become an assembling unit  35 . The hole  71  makes it possible to lead a tension bar  17  through the holes  4  of two construction-units  23  joined in the longitudinal direction  1 . The assembling unit  35  can be made of wood, steel, metal or polymer. 
       FIG. 31  illustrates a three-dimensional view of a series of assembling-units  35  attached to a construction-unit  23  its holes  4  going in the longitudinal direction  1 . The assembling-unit can be twisted in order to make the flat part of the assembling-unit  35  visible or hidden. 
       FIG. 32  illustrates a profile-band  38  with a raised mid-section  72  that can be used for fixing the construction-unit  23  in the horizontal transverse direction  2  of the shelter  40 . The band also has a row of holes  73  for fixing it to the ground, a plinth, a base or a wall. The band can be made of steel, metal or polymer. 
       FIG. 33  illustrates an assembling of a profile-band  38  and a construction-unit  23 . The profile-band  38  has a raised mid-section  72  that fits into a groove in the lowest part of the construction-unit. This makes it able to fixing the construction-unit  23  in the horizontal transverse direction  2  by securing it to the ground, a plinth, a base or a wall. 
       FIG. 34  illustrates a series of construction-units  23  assembled as a shelter  40  placed on a frame of profile-bands leaving only the profile-band  39  in the transverse direction  2  visible. 
       FIG. 35  illustrates a series of construction-units  23  assembled as a shelter  40  placed raised from a frame of two parallel profile-bands  39  placed in the transverse direction  2  and two parallel profile-bands  38  placed in the longitudinal direction  1 . 
       FIG. 36  illustrates how the profile-band  39  in transverse direction  2  enfolds  75  the profile-band  38  going in the longitudinal direction  1  by letting the lower part of the profile-band  39  continue with a smaller displacement  76  under the profile-band  38  in the longitudinal direction and enfolding  75  it. 
       FIG. 37  illustrates an alternative version of the profile-band  38 . 
       FIG. 38  illustrates an alternative version of the profile-band  38 . 
       FIG. 39  illustrates how a series of construction-units  23  are ended in the longitudinal direction  1  by an end-piece  43  that fits the shape of the construction-unit  23  and secures the passage of the tension-bars  17  so the can be ended with a nut  45  just before being fully assembled. 
       FIG. 40  illustrates how a series of construction-units  23  are ended in the longitudinal direction  1  by an end-piece  43  that fits the shape of the construction-unit  23  after being assembled. 
       FIG. 41  illustrates how a series of construction-units  23  are ended in the longitudinal direction  1  by leading a tension-bar  17  through a conic tube  37  and fit into an inner thread  42  in a connection-unit  46  going through a hole  73  in an end-piece  43  leaving a outer thread  44  visible to be ended with a closed nut  45 . 
       FIG. 42  illustrates how a series of construction-units  23  are ended with an end-piece  43  leaving a closed nut  45  visible. 
       FIG. 43  illustrates how a series of construction-units  23  are ended with end-pieces  43  can be added a wall  33  going in the transverse direction  2  at the end of the shelter  40 . 
       FIG. 44  illustrates how a series of construction-units  23  are ended with end-pieces  43  can be added a wall  33  going in the transverse direction  2  recessed from the end of the shelter  40 . 
       FIG. 45  illustrates the three wall-units  47 + 48 + 49  separated to reveal how they are connected with a connection-unit  35  that fits into horizontal holes  74  in the wall-units  47 + 48 + 49 . 
       FIG. 46  illustrates how the three wall-units  47 + 48 + 49  are connected to become an assembled wall-unit  33 . 
       FIG. 47  illustrates a wall-unit  33  is placed on the profile-band  39  placed in the transverse direction  2 . 
       FIG. 48  illustrates a top-connector  50  which is a plate with two holes that secure the passage of the tension-bars  17 . The top-connector  50  has an upper middle area  51  that can fit around the lower half of the top tube  10 . The top-connector also has two holes  52  for hanging something up inside the shelter  40  when assembled. The top-connector can consist of metal, polymer or steel. 
       FIG. 49  illustrates a top-connector  50 , which is a plate with two holes  53  that secure the passage of the tension-bars  17  by leaving holes  53  the fit the conic tube  36  that can be placed in the upper hole of the two similar construction-units  23  facing each other in the top on each side of the top tube  10 . 
       FIG. 50  illustrates a top-connector  50 , which is a plate with two holes  53  assembled with two conic tubes  36  that can be placed in the upper hole of the two similar construction-units  23  facing each other in the top on each side of the top tube  10   
       FIG. 51  illustrates a top-connector  50 , which is a plate with two holes  53  assembled with two conic tubes  36  that are placed in the upper hole of the two similar construction-units  23  facing each other in the top on each side of the top tube  10   
       FIG. 52  illustrates a shelter  40  covered with a tarpaulin  51  stretched in the transverse direction  2  and secured to the ground by placing a series of sandbags  53  on the end flaps  52  of the tarpaulin  51 . The end has an opening  55  and a ventilated top  54 . The tarpaulin can be made from polymer or treated canvas. 
       FIG. 53  illustrates a shelter  40  covered with a tarpaulin  51  stretched in the transverse direction  2  and a raised opening  55  held up by poles  56  and rope  57 . 
       FIG. 54  illustrates a shelter  40  placed on a base  58  and covered with a tarpaulin  51  stretched in the transverse direction  2 . End flaps  52  of the tarpaulin can be secured to the base  58 . The wall in the transverse direction has been equipped with a ventilation-unit  59  and a door with a lower part  61  and a upper part  60  that can open separately. 
       FIG. 55  illustrates a shelter  40  placed on an adjustable plinth  62  and covered with a tarpaulin  51  stretched in the transverse direction  2 . End flaps  52  of the tarpaulin can be secured to the adjustable plinth  62 . The wall in the transverse direction has been equipped with a ventilation-unit  59  and a door with a lower part  61  and an upper part  60  that can open separately. 
       FIG. 56  illustrates a shelter  40  placed on a floor tarpaulin  63  and covered with a tarpaulin  51  stretched in the transverse direction  2 . Flaps  64  welded on to the down-side of the tarpaulin  51  are connected to the floor tarpaulin  63 . 
       FIG. 57  illustrates three phases of transforming an immediate shelter  77  into a more permanent structure and thereby having the advantage the simplicity of moving the light weight construction-units up on a base  79  to obtain a more permanent dwelling  78 . 
       FIG. 58  illustrates how a series of construction-units  40  possibly from immediate shelters  77  are integrated in the roof-structure of two-story terraced houses  79 . This makes it possible to obtain well insulated homes.

Summary:
A construction-unit ( 23 ) that is adapted for being combined with one more similar units ( 23 ) to constitute a self-carrying structure ( 40 ) to use for shelter or dwelling wherein each construction-unit ( 23 ) make up for both one sidewall and half a roof in one segment. A plurality of construction-units ( 23 ) are adapted for constructing a static functional self-carrying structure ( 40 ) where the shape has a curved design related to the mathematical expression The Hyperbolic Cosine or part of an Ellipse in the traverse direction and a linear design in the longitudinal direction when placed as a part of an assembled shelter ( 40 ).