Complex sentence: A rig mat is a portable platform used to support equipment used in construction and resource-based activities including drilling rigs, camps, tanks, helipads, etc. It also includes a structural roadway to provide passage over unstable ground, pipelines and more.
Split into simpler sentences: A rig mat is a portable platform used to support equipment used in construction and other resource-based activities, including drilling rigs, camps, tanks, and helipad. It may also be used as a structural roadway to provide passage over unstable ground, pipelines and more.