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 fig3 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 fig3 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 fig3 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 fig3 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.