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  Void Former & Coupler:  
     
 
Void former tubes are embedded to reduce the concrete cross sectional area and are thus useful to save the volume of concrete. The reduction in dead weight is substantial, thereby ensuring economy in design of substructure. Void forming tubes obtain very high radial rigidity by means of special corrugations.
Dynamic group has developed machine for manufacturing void formers for various sizes-diameters ranging from 250mm to 1500mm. Void former machines are portable, which can be installed at site thereby reducing the transportation cost & saving time.
Dynamic Void formers are installed on many prestigious National Highway Projects for contractors like LG-Patel JV for Galaxy Flyover (2000m), Persys-ATL JV for Yamuna Bridge (1000 ID), UPSBCL for Delhi Flyover (600 ID-1200m), LIMAK-SOMAJV (800ID-510m), Unitech Ltd. for Delhi Project (1200 ID) etc.
Void forming tubes meet the requirements of concrete structures for a highly rigid but light sheet metal tube that can withstand concrete pressure without deformation. The seam is highly tight, thus preventing water from entering the tube. The low weight makes tube handling easy and their internal seams and corrugations ensure that the tubes do not catch on each other and faciliate the mounting of female end cones or caps.
 
 
       
   
       
 
 
 
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