Modular Truss-Beams

actually it´s only a test-thing for getting some inspiration and physical response.
An assembled Beam weights around 380g/m (rods + PLA).

element-size: 50x50x50

1x truss-element = 10g
1x m3 threaded rod = 42g/m
1x washer+nut = 1,5g

m_b = (4 x 42g/m) + (20/m x 10g) + (8/m x 1,5g)
m_b = 168g/m + 200g + 12g/m
m_b = 380g/m

• put 4 threaded rods (m3) through the holes along the edges
• take some washers and nuts and tighten these evenly

the beam has a relative high mechanical load capacity,
although i didn't tried to breakdown it.
The shown two side pivoted beam on the photo shows a load of 10kg (also tried 15kg) in the middle of a 0,85m long element-bond. However, the deformation is small.

For make it even lighter, you should try to get the tensile loads in it with nylon filament or something like that.

Doesn't Matter

Doesn't Matter