Waldemar Moderhak
Sea Fisheries Institute, Kołłątaja 1, 81-332 Gdynia, Poland

Key words: breaking strength, netting, meshes turned through 90°.

Abstract.
This paper presents preliminary results of investigations of the breaking resistance of both standard and turned through 90° meshes. Due to the inappropriate load on the knots during standard breaking, the tests were carried out in a different manner than standard tests. It was determined that turning meshes through 90° does not result in the decrease of their  resistance to breaking force. An increase of tensile force was registered by about 15% to 25% for meshes with 1.1 mm and 1.8 mm bar thickness, respectively.