Kopnes aprēķins būvmehāanikā

∑x=0;
-N7-8*Cos 6.34-N2-8*Sin 56.3+N3-8*Sin 56.3+N8-9*Cos 6.34 =0;
277.69-74.4-10.8-192.9=-0.41≈0

∑x=0;
-N7-8*Sin 6.34-N2-8*Cos 56.3-N3-8*Cos 56.3-N8-9*Sin 6.34-P1=0;
30.85-49.6+7.21+21.4-10=-0.14≈0
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