check the minimum of 5 sections, on each test cross-sectional thickness 2 place (wrong number + 10 cm width, thickness (above) + 0, 5 cm and (under nail)-2 cm to + 1, 0cm, horizontal surface slope error curb + 5% 0).
test a minimum of 5 sections, on each test section thickness of 2 seats (+ 10cm width tolerance, thickness (the nail on) + 0.5cm and (nail bottom) -2cm to + 1,0cm, wrong transverse slope of the sidewalk + 5% 0).