Compression in Lbs. … Compression in kg. A 7 m girder with lattice strips 10 x 0. 5 mm on tubes 30 x 0.8 mm in equilateral triangular position of 0.3 m was designed to support 8550 kg. Weight of girder 20 kg. Length tested, 700 mm with tubes 30 x 0.8 mm. At 8300 kg one of the tubes buckled toward the axis of the gir-…
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