Commercial Door Specification Changes
That gap matters for commercial doors too, because commercial parks tend to go up in the same building waves as the housing around them. A door and track system installed in the early-to-mid 1980s is built to a different spec than one from the 1960s stock common closer to Wheaton itself - heavier gauge track in some cases, but also opener technology and spring counterbalance systems that are now thirty-plus years into their service life either way.