Complex sentence: Also beyond their usage as viewing platforms they are frequently built around the chimney of the residence creating an easy access route to the chimney allowing the residents of the home to pour sand down burning chineys which would otherwise continue to burn the house down unchecked.
Split into simpler sentences: Also beyond their usage as viewing platforms they are frequently built around the chimney of the residence creating an easy access route to the chimney. This allows the residents of the home to pour sand down burning chimneys which would otherwise continue to burn the house down unchecked.