mesh of reinforcement the grid to be truly effective must be supported slightly above the casting pallet surface 42 the invention provides accurate placement of preformed mesh 40 at the correct height and lessens time consuming wire tying of the mesh to bottom strand 44 the reinforcing bars of mesh 40 are supported in slot 50 in the central strand cups 12 of the lower chair portion 10 preferably when the finished plank is to be cut to desired lengths the saw cuts in th cured plank 56 are made between transverse rods 52 of the invention when a predetermined mesh width is utilized placement of the strand chairs positively aligns the strand both vertically and laterally to the casting bed and to the mesh the strand chairs of the invention eliminate the need for conventional strand guides forces in the product are more uniform due to the strand chairs which greatly lessens strand sagging in the uncured concrete the position alignment provided by the strand chairs also prevents twisting of the strand the strand mesh and other reinforcing rods may therefore be more accurately positioned within the concrete panels attachment plates and end lifters may be accurately positioned in the concrete panels due to the accurate placement of the fabricated mesh supported by the strand chairs fig9 through 12 show transverse reinforcing rods 52 in phantom enlarged and higher above the casting pallet 42 than preferred for drawing clarity fig7 and 8 clearly illustrate the relative diameter of transverse rods 52 and their close proximity to the casting pallet 42 fig8 shows basically the same arrangement as fig7 for the lower strand 44 reinforcing bar mesh 40 and transverse reinforcing bars 52 but shows additionally the use of an upper chair 29 which supports.