When securing concrete pipe with a diameter up to 45 inches loaded crosswise as a group, a crosswise tiedown should be used every how many feet?

As a group Place lengthwise tiedowns over the group of pipes: Either one 13 mm (1/2 in) chain or wire rope, Or two 10 mm (3/8 in) diameter chain or wire rope Place one crosswise tiedown for every 3.0 m (10 ft) of load length. Either attach the side-to-side tiedown through a pipe Or pass the tiedown over both front-to-back tiedowns between two pipes on the top tier.