RAP3 DTA Humla has trialled a new approach for road surfacing using a Camber Board made from locally available wooden planking. The main purpose of the board is to determine the correct camber for RAP3 roads. In the photo the road has no drains so that when it rains the runoff is channelled across to the roads outer edge by the slope of the camber. As per LRN rule the outward slope of the road surface should be 5% across the roadway width of 4.5m. The board is designed in a format of right angle triangle following the Pythagoras rule and a small spirit level is indented on the upper edge of the board. If the Camber board is made properly it can be used in place of a pipe level.