Joint former apparatus

Abstract

A joint former apparatus for forming a joint between concrete elements, the joint former apparatus including an upper wall and a lower wall below the upper wall, wherein the upper wall forms a wavelike configuration, the lower wall forms a wavelike configuration, and wherein the wavelike configuration of the lower wall is longitudinally offset relative to the wavelike configuration of the upper wall.

1 . A joint former apparatus for forming a joint between concrete elements, the joint former apparatus comprising:
 an upper wall having a wavelike configuration;   a lower wall below the upper wall and having a wavelike configuration, wherein the wavelike configuration of the lower wall is longitudinally offset relative to the wavelike configuration of the upper wall.   
     
     
         2 . The joint former apparatus of  claim 1 , wherein the wavelike configuration of the lower wall is out of phase with the wavelike configuration of the upper wall. 
     
     
         3 . The joint former apparatus of  claim 1 , wherein the upper wall is vertical. 
     
     
         4 . The joint former apparatus of  claim 1 , wherein the lower wall is vertical. 
     
     
         5 . The joint former apparatus of  claim 1 , wherein the wavelike configuration of the lower wall is at a same frequency as the wavelike configuration of the upper wall. 
     
     
         6 . The joint former apparatus of  claim 1 , wherein the wavelike configuration of the lower wall is at a same amplitude as the wavelike configuration of the upper wall. 
     
     
         7 . The joint former apparatus of  claim 1 , wherein the wavelike configuration of the lower wall is shifted by one half cycle relative to the wavelike configuration of the upper wall. 
     
     
         8 . The joint former apparatus of  claim 1 , wherein the wavelike configuration of the lower wall has a plurality of same lateral extremities as the wavelike configuration of the upper wall. 
     
     
         9 . The joint former apparatus of  claim 1 , wherein the wavelike configuration of the lower wall and the wavelike configuration of the upper wall are each formed by a series of planar sections. 
     
     
         10 . The joint former apparatus of  claim 9 , wherein the wavelike configuration of the lower wall and the wavelike configuration of the upper wall are each formed alternating between respective ones of the plurality of planar sections longitudinal to the joint and the planar sections at an angle to the joint. 
     
     
         11 . The joint former apparatus of  claim 10 , wherein the wavelike configuration of the lower wall and the wavelike configuration of the upper wall are each formed alternating between respective ones of the plurality of planar sections longitudinal to the joint and the planar sections at a 45° angle to the joint. 
     
     
         12 . The joint former apparatus of  claim 1 , which includes a horizontal separation barrier at lateral offsets between the upper wall and the lower wall. 
     
     
         13 . The joint former apparatus of  claim 1 , which is formed from a plastic material. 
     
     
         14 . The joint former apparatus of  claim 1 , wherein lateral offsets between the upper wall and the lower wall are arranged such that each lateral offset is configured to form a dowel protrusion on one concrete element which is slideable laterally with vertical support from the other concrete element. 
     
     
         15 . The joint former apparatus of  claim 1 , wherein the upper wall has the same height as the lower wall. 
     
     
         16 . The joint former apparatus of  claim 15 , wherein the upper wall height is half a panel thickness of one of the concrete elements and wherein the lower wall height is also half the panel thickness. 
     
     
         17 . The joint former apparatus of  claim 1 , which is part of an intersection apparatus configured to form an intersection between three or more concrete elements. 
     
     
         18 . The joint former apparatus of  claim 17 , which is part of an intersection apparatus configured to form the intersection between four concrete elements. 
     
     
         19 . The joint former apparatus of  claim 1 , which includes a body formed by the upper and lower walls and configured to be coupled to a plurality of supports at spaced locations along a length of the body, and which is configured such that each of the supports is rotatable through a partial rotation about a longitudinal axis of the support between an unlocked condition and a locked condition. 
     
     
         20 . The joint former apparatus of  claim 19 , wherein each support is height adjustable relative to the body in the unlocked condition and wherein each support is locked against height adjustment relative to the body in the locked condition.