Making The Grade - Classifying Locks

Many people make the mistake of thinking that one lock is as secure as the next. And coming from the standpoint of the consumer, it may look like the only real choices fall into the categories of color, brand and style. The appearance will be a factor but the primary focus of any lock purchase should be: will this protect me, my family and our property? And in that respect some locks don’t cut it. Does it really make since to try to protect your $150,000+ house with a $10 lock?

ANSI (American National Standards Institute)and BHMA (Builders Hardware Manufacturers Association) are two companies that regulate and test lock hardware to verify that the manufactures can live up to their claims with regard to strength and usage (cycle) promises.

The companies issue 3 Grade levels:

Grade 1(Heavy Commercial), Grade 2 (Light Commercial/ Heavy Residential) and Grade3 (Light residential.) The cycle requirements for the Grade 3 status is 200,000, which means it should withstand 200,000 cyclesbefore failure. The Grade 2 requirement is 400,000 cycles and the Grade 1 requirement is 800,000.

Along with the cycle standard there is also a strength standard. The strength standard regulates how much pressure or force the lock is designed to withstand during use before failure. The Grade 3 requirement for a door knob is 120 lbs of force and for a lever set 180 lbs. The Grade 2 knob is 150 lbs and the lever set is 225 lbs. And the Grade 1 knob is 300 lbs and lever set 450 lbs. The strength standards are designed to provide minimum levels of durability to guard against rough usage and vandalism.

Most of the locks sold at hardware stores are of the Grade 3 variety designed for residential use, quite often in a construction version with a part-plastic latch. So even within the Grade rating there is a variance between one Grade 3 and the next. For instance: A lock that’s made out of pot metal could meet the minimum strength and cycle standards. But who wants a lock that fails on the finish line when for a little more you get a Grade 3 lock made out of higher quality metal that can meet and exceed the minimum standards; and look good doing it?

Many locksmiths carry the higher quality locks that will better secure your home or business, and yes they tend to cost a little more. The question isn’t: “Can I afford better locks?” the question should be: “Can I afford not to have them?”

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