Dear Stovers
Rebars 12x12x700 mm x15 p. I used 40 years ago . Later 4mm iron sheet with 5x5 mm holes and 5x5 mm closed spaces .. Now I prefer stainles steel 6 mm woven round wires with 10x10 mm spaces . 350x700 mm . It supports the load 6-20 Kg wood . It last for ever if covered with stainless seeve made of 1 mm thick stainless cut in windows 3x6 mm quenced .The later , It last 1 year and gives white ash protecting partly the grates due it smal size and its isolation !! The smal mass dont rob heat as rebars do . Rebars have no protection by ash isolation . Rebars gives carbon loss, no white ash . Alumine ceramic plate Al2O3 must be the ideal grate if 10 mm thick and conical holes and 3X6 mm .open on the top . 4x8 mm under . Spaces 4 mm . It can be mouldes as perles for electric heaters have . Regards Frans.
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