Dalzell's 1,204 households sit inside a service area with 10,145 households total and 4,749 owner-occupied houses, so this is one piece of a larger coverage footprint we run from Sumter. The area-wide housing stock mostly dates to the 1980s and 90s across the 13 named communities we cover, and Dalzell's median year of 1990 puts it toward the newer end of that span rather than the older end.
That newer-leaning stock generally means standard torsion spring setups rather than the older extension spring arrangements you'd find on pre-1980s construction, and openers that are more likely to already have basic safety sensors built in from the factory - even if those sensors are decades old now and due for replacement. We don't have a count of how many Dalzell garages have been renovated or had doors swapped since original construction, so some houses here will differ from this general pattern. If you're not sure which camp your door falls into, that's a quick thing to check on a visit.