Complex sentence: The building's structure was particularly innovative for its time, its concrete arches have a span of 165 ft (50.3m) from side to side, are 42 ft (12.8m) high and spaced 42 ft (12.8m) apart.
Split into simpler sentences: The building's structure was particularly innovative for its time. Its concrete arches have a span of 165 ft (50.3m) from side to side, are 42 ft (12.8m) high and spaced 42 ft (12.8m) apart.