Abstract: An anti-spalling edging comprising: a metal strip 21,31 adapted for concrete to be cast against, a return 22,32 along a top edge of the strip and forming a corner with the metal strip, a down-turn 23,33 from the edge of the return spaced from the strip and cut-outs in 26,36 the down-turn for anchoring it in the concrete and an elongate metallic member 201,202 extending in the corner, fixed to the strip and the return for reinforcement of the anti-spalling edge at the corner.

Abstract: An anti-spalling edging comprising: a metal strip 21,31 adapted for concrete to be cast against, a return 22,32 along a top edge of the strip and forming a corner with the metal strip, a down-turn 23,33 from the edge of the return spaced from the strip and cut-outs in 26,36 the down-turn for anchoring it in the concrete and an elongate metallic member 201,202 extending in the corner, fixed to the strip and the return for reinforcement of the anti-spalling edge at the corner.

Abstract: A screed rail comprises first and second elongate plate members arranged in face-to-face configuration, the first plate member being attached to leg members by height-adjustable lock means and the second plate member being attached to the first plate member by frangible joining means with the upper edges of the plate members in registration. The second plate member is attached only to the first plate member and the first plate member is attached to the leg members and by independent frangible connections to the second plate member whereby the plate members can separate laterally as the concrete cures without the attachment of the leg members inhibiting movement of the second plate member relative to the first.