Page 232 - Moving the Earth_ The Workbook of Excavation

DITCHING AND DEWATERING

5.34 THE WORK

FIGURE 5.23 Culvert alignment.

Multiple pipes should be parallel, and spaced at a distance of at least half of their outside diam-
eters, to facilitate tamping backfill. They should not be used for streams that carry coarse debris
which might choke the openings.

LAYING CORRUGATED PIPE

Handling. Corrugated pipe can be made up in any multiple of 2 feet. Lengths of 8 to 20 feet are
usually carried in stock, and longer or shorter ones are obtainable on special order. Shorter pieces
can also be made by cutting with a torch.
Small and medium sizes are usually unloaded and placed by hand, and medium to large ones
lowered with a rolling hitch or with a crane. The crane may use a hitch around each end or around
the middle, with the help of a person to keep it balanced. Soft rope should be used so as not to
scratch the galvanizing.