Trenches are excavations in the ground that are generally deeper than its width. In the civil engineering field of construction or maintenance, trenches are created to install or search for underground infrastructure or utilities (such as gas and water pipe lines or telephone lines, etc).

The construction of a trench is usually done in an environment with limited space. Sheet piles are an ideal solution to dig a trench under a steep slope with limited occurring displacement in the environment while providing a dry construction space at the bottom of the trench. In the situation the trench is dug to build a fluid transportation network, steel tubes are an ideal product to enclose the transported material. Whether they are carrying clean potable water for domestic or industrial consumption or discharging wastewater from a residence, transmission lines are essential to keeping the system operational. Steel pipe has been recognized by engineers as one of the most reliable products for this application.