What are the rules for securing concrete pipe?
• Applicability. • The rules in this section apply to the transportation of concrete pipe on flatbed trailers and vehicles, and lowboy trailers. • Concrete pipe bundled tightly together into a single rigid article that has no tendency to roll, and concrete pipe loaded in a sided vehicle or container must be secured in accordance with the provisions of & sect; & sect;393.100 through 393.114. • (b) General specifications for tiedowns. • The aggregate working load limit of all tiedowns on any group of pipes must not be less than half the total weight of all the pipes in the group. • A transverse tiedown through a pipe on an upper tier or over longitudinal tiedowns is considered to secure all those pipes beneath on which that tiedown causes pressure. • Blocking. • Blocking may be one or more pieces placed symmetrically about the center of a pipe. • One piece must extend at least half the distance from the center to each end of the pipe, and two pieces must be placed on the opposite side, o
