ST 331 TWO-HINGED PARABOLIC ARCH
GENERAL DESCRIPTION

    The equipment allows direct measurement of the horizontal component of the abutment thrust of a two hinged parabolic arch by using a simple model. It is to be used with ST300 Universal Structural Frame (separately supplied)

    A parabolic arch of uniform cross-section has one end of the arch on a fixed hinged pin and the other is on bearings on a horizontal force support.  The horizontal movement of the roller end is monitored by a dial indicator. Measurement of horizontal thrust by the roller end is by using a pulley and a load hanger.

TECHNICAL DATA
Arch : Mild steel 19 x 4.5 (approx) mm. section.      
  : 600 mm. span, 100 mm. rise.        
Loading point   :     7, equally spaced.        
ST119 Horizontal Force Support : 1 ea.          
ST131 Dial Indicator : 1 required (separately supplied).      
Loading hangers : 7 ea.          
Weights   : 1 lot.