FIELD: railway construction engineering. SUBSTANCE: this relates to upper structure of railway track. According to method, switch or frog chair 1 is installed on switch plate 2 or frog carriage. Switch or frog chair 1 is connected with switch plate or frog carriage. In installing, switch or frog chair 1 is axially aligned with axis of at least one hole preliminarily made along longitudinal axis of switch plate 2 or frog carriage. Connection is effected by welding over hole perimeter. EFFECT: high efficiency. 4 dwg
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