... not possible to chair a crossing entirely prototypically if the flangeway is not to scale. regards, Martin. Hi Martin, Screenshot below. Hope this explains what I'm on about. The bends in the wingrails are quite close to the centerline of the X timber. If I understand correctly, the X chair has to be positioned either before or after the bends, but when I do that it's overhanging the edge of the timber. It's easy enough to nudge the timber to accommodate the chair if that's legitimate. Regards, Andy 2983_121750_410000000.png posted: 12 Feb 2016 23:22 from: Andrew Barrowman Hi Martin, Your point has sunk in I think I will either have to make a special chair to accommodate the bend in the rail, or shove the timber a bit further away from the A timber. Regards, Andy posted: 12 Feb 2016 23:32 from: Martin Wynne Andrew Barrowman wrote: It's easy enough to nudge the timber to accommodate the chair if that's legitimate. Hi Andy, The rail separation in the X chair (and all ...