Culverts can be manufactured in either Helibore pipe (up to 3.6m
span/diameter) or bolted plate (up to 12m span/diameter). A wide
range of profiles is also available including pipe, pipe-arch, arch,
underpass and ellipse.
abrasion and this is normally in the form of in-situ concrete but other
options such as Reno mattresses are sometimes used.
