Mahtomedi, Minnesota

If you operate a place of public accommodation — a medical clinic, a retail storefront, a municipal building — Minnesota follows the 2010 ADA Standards. That means entrance doors must have clear opening width of at least 32 inches, require no more than 5 pounds of force to open, and activation hardware must be between 34 and 48 inches above the floor. For automatic doors, you'll need motion sensors or push-activation, and the door must hold open for a minimum of 3 seconds. An ANSI/BHMA A156.10-compliant operator is the standard.

Standard hydraulic closers use fluid that thickens below 0°F. That causes doors to slam or not close fully. You need closers rated to -30°F — like the LCN 4041 cold-duty version. EPDM threshold seals compress permanently after two or three freeze-thaw cycles. We see gaps of 1/4 inch or more at the threshold by February. Aluminum frames expand and contract — a frame that fit in October may bind the door by January. We've pulled frames that shifted because anchor bolts were set in untreated concrete.

For a storefront or dock door that sees 200+ cycles per day, inspect every six months. That means checking spring tension (torsion springs typically last 10,000–25,000 cycles), verifying closer backcheck and sweep speeds, and looking for hinge wear. Lower-traffic doors — municipal, school — can go annual, but still get them checked before winter. We recommend a baseline inspection in September. A broken spring on a Mahtomedi dock door in January costs you heated air and downtime.

Repair the door if the damage is limited to hardware — closer, hinges, glass breakage. Replace it if the frame is bent, the bottom rail is rotted, or the door leaf has steel fatigue cracks longer than 6 inches. A fire door with a missing UL label or a 3-hour rating compromised by a patched hole cannot be repaired; it must be replaced with a labeled door assembly. If the cycle count is past the door's design life — say 25,000 cycles on an entry door — new hardware won't fix worn bearings.