Improvements in and relating to road barriers and parts and fittings therefor

Abstract

An impact extension frame assembly for an impact attenuator system wherein the carriage frame assembly includes left and right side frames connected at an upstream end via: i. a top plate adapted to receive a connection component; and ii. a cross member; wherein the left and right side frames are also connected at a downstream end thereof via at least one shearing member.

1 - 11 . (canceled) 
     
     
         12 . An impact extension frame assembly for an impact attenuator system wherein the carriage frame assembly includes left and right side frames connected at an upstream end via:
 i. a top plate adapted to receive a connection component; and   ii. a cross member;   wherein the left and right side frames are also connected at a downstream end thereof via at least one shearing member.   
     
     
         13 . The impact extension frame assembly for an impact attenuator as claimed in  claim 12 , wherein the impact extension frame assembly projects a distance X ahead of the end face of an upstream terminal barrier section to which the impact extension frame assembly is attached. 
     
     
         14 . The impact extension frame assembly for an impact attenuator as claimed in  claim 12 , wherein the shearing member, in use, passes through an aperture in an upstream terminal barrier section to further connect the energy absorbing element thereto. 
     
     
         15 . The impact extension frame assembly for an impact attenuator as claimed in  claim 12 , wherein the left and right side frames have horizontal and vertical members which in use are configured to fit within channel portions on the outer surface of the barrier section. 
     
     
         16 . The impact extension frame assembly for an impact attenuator as claimed in  claim 12 , wherein the left and right side frame members do not contact the ground or other support surface. 
     
     
         17 . The impact extension frame assembly for an impact attenuator as claimed in  claim 12 , wherein the left and right side frame members only longitudinally extend around 33% the length of the terminal barrier section to which they are attached. 
     
     
         18 . An impact attenuator system which includes:
 at least two adjacent plastic hollow barrier sections (barrier sections) which are filled with water and are connected to one another at respective ends thereof wherein one barrier section has an upstream position relative to the other barrier section(s); and   an energy absorbing element which includes:   i. a carriage frame assembly comprising left and right side frames connected at an upstream end thereof via:   ii. a top plate adapted to receive a connection component;   iii. a cross member;   wherein the left and right side frames are also connected at a downstream end thereof via at least one shearing member, the shearing member further securing the carriage frame assembly to the forward end of the barrier section having the upstream position.   
     
     
         19 . The impact attenuator system as claimed in  claim 18 , wherein all the barrier sections are filled with water. 
     
     
         20 . A kit of parts for a carriage assembly for an impact attenuator system which includes:
 left and right side frames;   a top plate;   a cross member; and   a shearing member securely connected to side frames.   
     
     
         21 . A kit of parts for an impact attenuator system which includes:
 a plurality of hollow barrier sections adapted to be filled with water;   a kit of parts for a carriage assembly, as claimed in claim  20 , to be fitted in use, to an upstream hollow barrier section;   an asymmetric twin pin connector for connecting the carriage assembly to the upstream hollow barrier section;   a symmetric twin pin connector for connecting the plurality of hollow barrier sections.