A support apparatus (10) for providing a robust load bearing support for screed rails (12) during the laying of concrete in which the height of the screed rails can be accurately adjusted and supported so as to allow the screed rails to be used for carrying concrete levelling devices such as a roller beam levelling device consists of a ground engaging base block (14), a first member (22) releasably connected at its lower end to the base block and a support member (28) releasably connected to the upper end of the first member for supporting the screed rails (12) at a desired height above the ground (16) where the first member and support member combination is of adjustable length to permit adjustment of the height of the screed rails carried thereby.
A rebar support is provided through an arm-type apparatus, which may have a plurality of dimensions for different concrete constructions. A tube in the apparatus is slid over an upright support such as a grade stake to hold the apparatus in place. Multiple instances of the apparatus may thus be placed over multiple stakes to hold rebar in the correct position for the grid pattern required to strengthen the concrete in a particular structure. Rebar may then be quickly and securely snapped into notches on the apparatus without tying or extensive training of personnel. In an embodiment different designs of the apparatus are provided with notches designed to fit rebar of different diameters. In another embodiment snap-out tabs in the notches are used so that one design of the apparatus may be employed with rebar with different dimensions. The apparatus may be Y-shaped to further strengthen the arms.
A chair for supporting bars is comprised of telescoping sections which lock in an extended position. The chair is intended for supporting the reinforcing bars utilized in reinforced concrete construction, but can also support other long bodies. The sections of the chair can be extended and locked individually, so the height of the chair is determined by which sections of the chair are extended and which sections are collapsed.
