Star Prairie, Wisconsin

Wisconsin adopts the 2010 ADA Standards. For an automatic door in Star Prairie, you need sensor activation no more than 6 inches from the door face, opening speed under 1.5 seconds for a 32-inch wide opening, and holding time at least 3 seconds. The operator must be UL 325 listed. We test these with a stopwatch and a tape measure on every install. If your storefront or municipal entry doesn't meet those, you're exposed to a complaint — and that's not a headache you want from the state.

The freeze-thaw cycle is brutal on commercial doors here. LCN and Norton closers — the ones most commonly installed — have fluid viscosity rated for -30°F, but most units in the field aren't that spec. Below 10°F, the closer slows down dramatically, and the door stops latching. EPDM threshold seals get compression set after 2–3 winters, leaving a 1/8-inch gap that lets in snow and cold air. Aluminum expansion in the frame creates gaps that freeze shut. We see it every spring.

Dock doors and storefront entries in Star Prairie should see a technician twice a year — once before October 15 (pre-winter) and once after April 1 (post-thaw). Each visit includes closer speed verification (latch speed under 1 second), hinge pin lubrication with dry PTFE spray, threshold seal gap measurement (replace if over 1/8 inch), and a cycle test on the operator. High-cycle spring sets — rated for 25,000 cycles — should be replaced before they hit 20,000 in a cold unheated bay. We mark the date right on the steel.

A door needs replacement if the frame is twisted more than 1/4 inch out of square — you can't fix that. If the fire-rated label is missing or damaged and an insurance auditor spots it, replacement is the only option. For high-cycle dock doors, once the torsion spring counterbalance has been replaced twice, the cables and drums are usually worn enough that a full door assembly costs less than three more years of patch repairs. We'll show you the wear marks and cycle counts so you can decide on facts, not guesses.