minutes if wood glue is used another layer of the truss can be put on it according to the same principle as it is indicated at in fig9 the completed truss 5 consists of many identical cells which have the shape of an equilateral triangle and obtains thus optimal stability of course another also three dimensional structure of a truss 5 can be chosen if required for instance in the form of two planar and parallel trusses connected to each other or the like favourably the bamboo tubes 4 always have a length of only approximately 1 to 2 m so that no buckling effects can appear due to a excessive flexural stress at a too long bamboo tube 4 the node elements 52 can be individually finished on the spot at the construction site like all other connection elements 1 14 21 34 38 for this purpose initially base bodies 55 of the desired circumferential shape are cut out of a plate of preferably wood in particular of moulded plywood which can take place at a factory or sawmill as applicable the required connecting structures 3 22 43 are then worked into these base bodies 55 on the spot even in already mounted condition as required a cutting tool 56 shown in fig1 and 11.