Specification:

I 200 x 100 x 5.5 x 8 x 12m: 20.9 kg/m: 10 beams

I 250 x 125 x 6 x 9 x 12m: 29 kg/m: 101 beams

I 300 x 150 x 6.5 x 9 x 12m: 36,7 kg/m: 100 beams

I 350 x 175 x 6 x 9 x 12m: 41.2 kg/m: 10 beams

I 400 x 200 x 7 x 11 x 12m: 56.1kg/m: 522 beams