%0 Journal Article %T CALCULATION OF COMPOSITE WOOD BEAMS IS BASED ON VARIATIONAL METHOD %A Shevchenko, A.V. %A Shapovalov, S.. %K hardwood timber, composite rods, the method by V. Z. Vlasov. %J Bulletin of Belgorod State Technological University named after. V. G. Shukhov %D 2017 %N 2 %P 3 %I Belgorod State Technological University named after V.G. Shukhov