Lock Ratings

Rating

Description

20 Minutes

Light fire protection, common in residential doors.

1 Hour

Moderate fire resistance for some commercial/residential use.

90 Minutes

Higher resistance, suitable for commercial settings.

3 Hours

Maximum standard rating, typically for industrial/fire doors.

Grade

Description

Grade 1

Highest level of security and durability; commercial grade.

Grade 2

Intermediate security; light commercial or high-end residential.

Grade 3

Basic residential security; least durable.

Residential Grade

Generic term for Grade 3 or lower durability locks

Grade 1

✅ Best for entries

✅ Shared entries

✅ Required

✅ Corrosion-resistant hardware

Grade 2

✅ Interior doors

✅ Unit interiors

✅ Light use

⚠️ May corrode

Grade 3

⚠️ Minimum only

❌ Not suitable

❌ Not accepted

❌ Avoid entirely

Residential Grade

✅ Indoor only

⚠️ Limited use

❌ Not suitable

❌ Not for salty air zones

Rating

Description

Coastal Use

IP54

Protected against limited dust ingress and water spray from any direction.

❌ Not resistant to salt air

IP55

Better dust protection; water jets from any direction.

⚠️ Limited marine resistance

IP65

Dust-tight; protected against low-pressure water jets.

✅ Good for coastal installs

IP66

Dust-tight; high-pressure water jets.

✅ Strongly recommended

IPX5

Water jets from any direction (no dust rating).

⚠️ No dust rating

IPX8

Continuous immersion in water beyond 1 meter (no dust rating).

✅ For high-moisture exposure

UL294

Electronic access control

✅ Look for weatherproof housing

UL 10C

Fire-rated door assemblies

✅ Use with rust-proof components