Some bad advice here applying a “no deeper than wide” rule to beach conditions. Wet sand with shifting density won’t behave like regular earth, and a pit at the beach is going to behave differently than a trench in regular dirt. If someone said they’re going to stick you in a 6’x6’x6’ pit surrounded by unstable wet concrete and let it go with you in the middle you’d probably say this wasn’t the best safety advice.
Some bad advice here applying a “no deeper than wide” rule to beach conditions. Wet sand with shifting density won’t behave like regular earth, and a pit at the beach is going to behave differently than a trench in regular dirt. If someone said they’re going to stick you in a 6’x6’x6’ pit surrounded by unstable wet concrete and let it go with you in the middle you’d probably say this wasn’t the best safety advice.
Its also likely to just hit the water table at the beach.