Hawthorne, CA Building Safety: Door Locking Hardware (2026)

60, the building security requirements, applies to all activity requiring a building permit and reaches existing buildings the same way the Uniform Building Code does. 050 requires the door jamb itself to be backed solid for six inches on each side of the strike, horizontal blocking between studs at lock height for three stud spaces on each side of a wood-framed opening, one-piece door stops on in-swinging wood jambs, a strike plate of at least sixteen-gauge steel, bronze, or brass fastened with two screws penetrating at least two inches into solid backing, and non-removable hinge pins on out-swinging doors.

090 then sets the lock hardware standard for residential buildings and attached garages, including the door from the garage into the dwelling: a single-cylinder deadbolt with a minimum one-inch bolt projection built to resist cutting-tool attack, at least three-fourths inch of embedment into the strike, a cylinder guard, a minimum of five pin tumblers, connecting screws of at least one-fourth inch diameter, and a dual-locking mechanism that retracts both deadbolt and latch with one motion of the interior knob or lever. The inactive leaf of a double door needs metal flush bolts embedded at least five-eighths inch into the head and threshold.

Glazing within twelve inches of any locking mechanism must be fully tempered or rated burglary-resistant glazing, and front doors without a clear-vision panel need a 180-degree door viewer mounted no higher than 58 inches above the floor. Compliance for existing structures was mandatory within one year of the chapter's 1988 adoption.