of protuberances depressions grooves ridges or the like which would affect the course of a bowling ball rolled on the bowling surface 14 the longitudinal length of each of the lanes 12 is generally 60 feet from the foul line 16 to the center of the location of the number one pin 22 at the pin deck area 16 each of the lanes 12 has a transverse width indicated at w of 42 inches and the edges 12 u2032 and 12 u2033 of each of the lanes 12 are bounded by a gutter 24 extending below the bowling surface 14 of the lanes 12 and each of the gutters has a width g of nine inches the dimensions as above stated are the nominal dimensions as specified by the abc and wibc bowling organizations as shown on fig1 alternate gutters 24 of adjacent lanes 12 are separated by a single division capping 26 and a ball return capping 28 the single division capping 26 and the ball return cover capping 28 extend vertically above the level of the bowling surface 14 of the lanes 12 the transverse width single division capping as indicated a a may be on the order of 2 u00be inches and the transverse with of the ball return cover capping 28 as indicated a b may be on the order of 9 to 10 u00bd inches which are not abc specified dimensions but are an accepted in the bowling alley industry as standard dimensions some bowling alley facilities 10.