The N55 SPACEFRAME is a low-cost, movable lightweight construction that can easily be transformed. It is dimensioned as a living unit for 3-4 persons and demands practically no maintenance. The construction can be erected by anybody in a short time.
The N55 SPACEFRAME is configured as a truncated tetrahedron with an indoor ground floor of approx. 20 m˜. According to needs and economy, the size and configuration may be changed, and extra floors and rooms may be included: it is easy to add to the construction in stages.
The entire unit is constructed from small lightweight components which all can be handled without the use of cranes or other heavy machinery. All components are materially minimised, have a low degree of manufacturing and are produced by a few simple machines, which anybody can operate. When stacked, the components take up very little space. The construction is assembled by hand. It can be erected directly onto the ground, since a cast foundation is not necessary. The structure can be dismantled and rebuilt many times over without damaging any of the components. The construction can be moved either fully assembled, or partly dismantled.
By constructing spaceframes one is able to utilize geometry to achieve very strong, self-load-bearing structures and at the same time save materials and work.
The building system in N55 SPACEFRAME is configured as a space lattice known as the common space lattice, the octet truss, or the octahedron-tetrahedron complex.
The geometry of this space lattice does not depend on gravity for strength or integrity, and therefore is suitable for employment in satellites and space platforms, in big halls etc, but is rarely employed for housing and other small-scale purposes.
The distribution of tensile and compressive forces, the rigidity and the ability of the structure to deform locally makes it safe under extreme conditions like earthquakes or sudden impacts. Because of the geometry, loads are distributed well throughout the construction.
All the struts in the construction are of equal length, ensuring an economic production with few different components.
The octet truss is among the structures in which one obtains the greatest strength using the least materials.
The struts used in the building system for the N55 SPACEFRAME are acid resistant stainless steel, highly durable, prepared for numerous reassemblies and chemically immune to most conditions. The equal-length struts are bent in 70° angles for tetrahedra and 110° angles for octahedra. The struts are assembled by hand using stainless acid resistant bolts and nuts that are tightened with a screwdriver. Two tetrahedra and one octahedron make the basic building "brick", with which one can build walls, foundation and roof.
The structure can be thinned out to use fewer struts. The resulting space enclosure has walls of 50 cm, inclining at angles of 70° and 110°. The walls can be filled with insulating material, or be used as cupboards, to hide electrical installations or for growing plants inside.
On the outside the construction is covered with plates in acid resistant stainless steel, which need no maintenance.
Inside planes are covered with moisture-absorbing plaster-fibreboard plates. The floor is made of birch plywood and polycarbonate is used for windows. The window frame is covered with plates of insulating, light-reflecting polyethylene foam.
The door is a plate of honeycomb aluminium. Polycarbonate is used for skylight. If the walls are properly insulated, there should be no need to heat the room except under extreme conditions. Lighting, sun radiation, cooking and normal activities will provide sufficient heating. All kinds of insulating material can be used: Rockwool, sheep wool, paper, polystyrene, and so on.
Alternating tetrahedra/octahedra are put together to form girders which are combined to form the base. The walls are built onto the base one girder at the time. During assembly, the struts are bolted only loosely together, and the bolts are finally tightened when all the parts of a layer are in place.
There is no need for maintenance of the main construction or the outside plating. The floor and walls may need extra varnish every now and then.
Weight: approx. 4.5 tons.
Height/width: approx. 5.5 m.
Approx. 3000 pc 110° / 4500 pc 70° struts, 1 mm stainless, acid-resistant steel AISI 316 L. 144 pc 55° struts for mounting square outside plates.
All struts with 4 pc holes Ø 6 mm. Approx. 8000 pc M6 x 12 mm stainless set screws and M6 stainless lock nuts. Fishplates 80 mm, hole Ø 6.5 mm.
540 pc 62.5 cm regular triangles / 36 pc 62.5 x 65 cm squares in 1 mm stainless, acid-resistant steel AISI 316 L, M6 x 100 stainless set screw, M6 top nut, 24/ 8 mm disc, M6 stainless nut, 6/10 mm draught strip, nylon wedges.
330 pc 60 cm triangles, 3 squares in 10 mm plaster/fibreboard, acid proof insex screw M6 x 35 mm, 24/8 mm disc, M6 stainless nut, 6/10 mm draught strip.
60 pc 60 cm triangles in 4 mm polycarbonate, stainless insex screw M6 x 35 mm, 24/8 mm disc, M6 stainless nut, 6/10 mm draught strip, nylon wedges. Window frame: 35 mm polyethylene-foam.
110 pc 60 mm triangles in 10 mm birch plywood, stainless insex screw M6 x 35 mm, 24/8 mm disc, M6 stainless nut, 6/10 mm draught strip, nylon wedges.
6 pc 62.5 cm triangles in polycarbonate, 27 pc 62.5 triangles in stainless, acid-resistant steel AISI 316 L. All plates with 12 holes Ø 7 mm, M6 x 100 mm stainless set screw, 24/8 mm disc, M6 stainless nut, 6/10 mm draught strip, flat rubber washer, nylon wedges.
Hexagonal 6 mm sandwich plate, 120 cm across, 10 mm rubber strip, rubber handle, lock.
31 pc low density PE tanks with water and disinfectant.
N55 SPACEFRAME situations
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