Patent attributes
A structure for supporting concrete reinforcement bars in an orthogonal relationship above a surface includes a base member having a central opening and first and second pairs of leg members extending upward at an angle from the base member on opposite sides of the central opening, wherein the first leg members are longer than the second leg members. Attached to shoulders of the first and second leg members are first and second cradles having opposing upper and lower sidewalls that form channels therebetween. The first and second cradles receive reinforcement bars that are retained within the cradles by retaining members protruding from the opposing sidewalls into the channels. A ridge extending from the base member has a central portion and first and second portions sloping down from the central portion toward the base member which form a channel for receiving a reinforcement bar. The structure also includes various upper and lower fillets and edge brace portions at various points on the upper and lower cradles, including fillets between the opposing upper and lower sidewalls and first and second leg members and edge brace portions between the outer edges and bottom edges of the opposing upper and lower sidewalls and first and second leg members.
