Grantsburg, Wisconsin

Wisconsin follows the ADA Standards for Accessible Design — automatic doors need a minimum 32-inch clear opening and the operator must open in less than 3 seconds. Push plates must be within 34–48 inches high. For a retail storefront in Grantsburg, ANSI 156.10 applies. If your door has a manual swing closer and you're getting foot traffic complaints, it's often cheaper to add a low-energy operator than to replace the whole frame. We can verify code compliance during a site visit.

Below 0°F, most hydraulic closers thicken up — latch speed drops, and the door won't close fully. We install Norton 7500 or LCN 1460 models, rated to -30°F, but only if you spec them. EPDM threshold seals get compression set after two winters in Grantsburg; you'll see a 1/8-inch gap at the bottom. Metal thresholds contract — aluminum moves about 0.0024 inches per foot per 10°F. If the door was hung in July and it's January, expect frame-to-threshold clearance to open up. We adjust with shims, not caulk.

For a dock door seeing 200 cycles a day at a Grantsburg warehouse — lubricate hinges and rollers every 3 months, not with WD-40 but a dry PTFE spray. Torsion springs are rated for 15,000 to 25,000 cycles; track your cycle count. At 15,000, inspect for coil gap variance. Lube tracks monthly in winter. Automatic storefront operators need motor brush checks every 6 months. We use a cycle counter on high-traffic doors to schedule before failure. Preventative every 6 months beats a February emergency call.

If the frame is racked more than 1/4 inch out of square — measure diagonals — repair is temporary. Same if the door has failed a spring cycle test twice. For a fire-rated door, any dents deeper than 1/16 inch in the core requires UL label documentation; if the label's gone or the door was cut for a push plate, replacement is the only path to compliance with NFPA 80. For storefront glass doors, if the aluminum stile has cracked from thermal stress, weld it once — second crack, replace.