Lightweight trellis-type space frame - has flattened bar connections between main frame bars and braces retained by bolts

摘要

The frame has a top and a bottom layer of cross bars (1,2) with some diagonal bars (3) connecting the layers of bottom and top bars. The main bars have some flat parts (11,21) spaced at regular intervals along them, while the diagonal bars have some flats (31) at their ends bent according to a chosen angle. At the connecting nodes (4) of the frame, a flat (11) of the first bar (1), a flat (21) of the second bar (2) and four flats (31) of the diagonal bars come together and are held by four bolts (5), one for each diagonal bar.