| 摘要 |
A beam chair for supporting, positioning and retaining a reinforcement bar is a concrete structural member and, in particular, in a concrete structural member such as a beam or slab. The beam chair is defined by a horizontal support surface which, together with first and second vertical support members, define an open cavity for receiving a longitudinally oriented reinforcing bar and wherein the bar is adapted to be supported by the horizontal support surface. The second vertical support member is provided with an upper side extension having a remote edge. The first and second vertical support members are provided, respectively, with first and second depending members which terminate in lower edges. A lower side extension projects from the second depending member parallel to the upper side extension. The beam chair is adapted to be placed within a form for the structural member by resting the lower edges and the lower side extension upon the bottom surface established for the form, and by placing the outer edge of the upper side extension against the side of the form. A plurality of beam chairs are adapted to be so arranged within the form, whereby they support upon their respective horizontal support surfaces at longitudinally spaced locations a reinforcing bar. The beam chair is adapted to accept a range of different sized reinforcing bars, and is particularly configured to locate the reinforcing bars the requiste distance inside the face of the concrete at the sides and bottom of the structural member.
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