2013 Grand National to modifications made for the previous year's race, Aintree announced that a number of further changes had been made for the 2013 National. Twelve of the 16 fences on the course were rebuilt with the timber frames within them replaced by a softer material known as "plastic birch". The fences are still covered with at least 14 inches of spruce and will remain the same height. The starting line was also moved 90 yards closer to the first fence, further away from the spectators' stands and thereby reducing slightly the overall distance. Aintree and the Professional Jockeys' Association jointly issued
Canal Turn those who were pulled up, carried out or refused at the fence: Canal Turn The Canal Turn is a fence on Aintree Racecourse's National Course and thus is jumped during the Grand National steeplechase which is held annually at the racecourse, located near Liverpool, England. Named for the Leeds & Liverpool Canal which passes alongside the racecourse at this point, it is jumped twice during the race, as the eighth and 24th fences. The fence is notable for the sharp left turn that the runners have to take as soon as they have negotiated the fence. The turn is almost