Anchor for use in joining concrete slabs

Abstract

A headed loop anchor ( 10 ) comprising a “U” shaped section having parallel spaced legs ( 11 and 12 ) and a looped adjoining section ( 13 ), the free ends ( 14 and 15 ) having heads ( 16 and 17 ). The headed loop anchor is formed by bending and then forging the head from the legs so the anchor is an integral unit. In use, the headed loop anchors are positioned in parallel spaced relation so that the looped sections ( 13 ) project from a slab so that a suitable connector may be used to hook over the loop sections ( 13 ) in order to connect adjacent concrete sections together.

1 . A headed loop anchor ( 10 ) when used in concrete for connection to reinforcing bars in an adjacent concrete slab to be poured afterwards, the headed loop anchor comprising a “U” shaped anchor having parallel spaced legs ( 11 , 12 ) each having respective free ends ( 14 , 15 ) and a loop section ( 13 ) bridging between the parallel spaced legs, each free end of the legs having a head ( 16 , 17 ), the headed loop anchor being locatable in a concrete slab with the loop section projecting from the slab and being adapted for connection to reinforcing bars in an adjacent slab to be poured afterwards. 
     
     
         2 . A headed loop anchor according to  claim 1  wherein the loop section is a circular section of bar. 
     
     
         3 . A headed loop anchor according to  claim 1  wherein the headed loop anchor is formed as an integral unit having heads formed from the loop anchor material in a hot forging process. 
     
     
         4 . A headed loop anchor according to  claim 1  wherein the loop anchor material is at least 600 grade wire. 
     
     
         5 . A headed loop anchor according to  claim 1  wherein the loop anchor is formed from a hard drawn wire of at least 600 grade high tensile wire. 
     
     
         6 . A partially completed concrete construction comprising a concrete slab employing spaced apart headed loop anchors, each headed loop anchor comprising a “U” shaped anchor having parallel spaced legs ( 11 , 12 ) each having respective free ends ( 14 , 15 ) and a loop section ( 13 ) bridging between the parallel spaced legs, each free end of the legs having a head ( 16 , 17 ), the headed loop anchors being located in the concrete slab with the loop section projecting from the slab and being adapted for connection to reinforcing bars in an adjacent slab to be poured afterwards. 
     
     
         7 . A partially completed concrete construction according to  claim 6  wherein the headed loop anchors have their heads set at 120 mm to 170 mm deep into the slab. 
     
     
         8 . A partially completed concrete construction according to  claim 6  wherein the headed loop anchors project from a rebate in the slab. 
     
     
         9 . A partially completed concrete construction according to  claim 6  wherein the headed loop anchors project from a rebate in the slab and each loop has a connector coupled thereto and connecting reinforcing to the respective loop sections. 
     
     
         10 . A partially completed concrete construction according to  claim 6  wherein the headed loop anchors project from a rebate in the slab and each loop has a connector coupled thereto and connecting reinforcing to the respective loop sections and the connectors having D-shaped lands matched to the loops and fitting inside the loops. 
     
     
         11 . A partially completed concrete construction according to  claim 6  wherein a connector used to connect the headed loop anchors to reinforcing in an adjacent concrete slab, the connector comprising a unit having a loop attachment means at one side to attach the connector to a loop section of the headed loop anchor and a reinforcement attachment means at the other side to attach the connector to the reinforcing in the adjacent concrete slab. 
     
     
         12 . A method of connecting two adjacent concrete slabs together using headed loop anchors ( 10 ) comprising the steps of first setting reinforcement for a first one of the two slabs ( 19 , 21 ) and then placing the legs ( 11 , 12 ) of plural headed loop anchors amongst the reinforcing with the loop section ( 13 ) positioned to project from the first slab ( 19 ) when poured, pouring the first slab, allowing it to cure sufficiently to begin preparation to pour the second slab, tie the headed loop anchors to reinforcing steel in the second slab and subsequently pour the second slab. 
     
     
         13 . The method according to  claim 12  wherein the headed loop anchors comprise headed loops anchors comprising a “U” shaped anchor having parallel spaced legs ( 11 , 12 ) each having respective free ends ( 14 , 15 ) and a loop section ( 13 ) bridging between the parallel spaced legs, each free end of the legs having a head ( 16 , 17 ). 
     
     
         14 . The method according to  claim 12  the headed loop anchors have a loop section comprising a circular section of bar. 
     
     
         15 . The method according to  claim 12  wherein a connector used to connect the headed loop anchors to reinforcing in an adjacent concrete slab. 
     
     
         16 . canceled 
     
     
         17 . canceled 
     
     
         18 . canceled