What class of stones for riprap ranges from 100 kgs to a maximum of 200 kgs with at least 50% weighing more than 150 kgs?

The class of stones for riprap defined as ranging from 100 kilograms to a maximum of 200 kilograms, with at least 50% of the stones weighing more than 150 kilograms, aligns with the specifications set out for Class D riprap. This classification is critical for applications where effective erosion control is necessary, as the size and weight of the stones contribute to stability and resistance against water movement.

Riprap serves to protect shorelines, streambeds, and embankments by absorbing and deflecting the energy of flowing water, so using the appropriate class of stone is essential for ensuring the performance of the riprap structure. In this case, the specific weight range ensures that the stones are substantial enough to withstand forces such as waves and currents, particularly because at least half of the stones exceed 150 kilograms, providing added stability.