Aames Lock install, repairs and maintains all sorts of mechanical hardware for every need and application. Below are examples of this that you may have on your building:
Cylindrical locks Mortise Locks Panic Hardware
Deadbolts Door Accessories
Adams Rite Corbin/Russwin International Jackson Precision
Sargent Von Duprin
Kwikset Schlage Corbin/Russwin Sargent Schlage Von Duprin
Stand Alone Alarms
Arrow Alarm Lock Detex Von Duprin (for panic bars)
Mag Engineering Ives
Locks are available in different grades, which relate to their construction and durability. These grades are a measure of application suitability. Most commercial applications require either Grade 1 or Grade 2 locking products. Because security, protection from vandalism, durability under heavy usage and other considerations are important, the greater strength of Grade 1 locks makes them the suitable choice for demanding applications. Grade 2 products are adequate for lighter duty, such as storage closets or doors where security is less of an issue than simply excluding people in general. They will keep people from walking through a door, but they provide much less protection against deliberate force than Grade 1 products.
ANSI/NHMA standards, monitored by independent testing laboratories, separate Grade 1 from Grade 2. Typically, Grade 1 locks must meet twice the requirements of Grade 2. In cycle tests for example, a Grade 2 lock need only function for 400,000 cycles, while a Grade 1 lock must meet at least 800,000 cycles. Some manufacturers regularly test beyond that limit into the millions of cycles.
Even among locks promoted as Grade 1, there can be some differences. For mortise locks, ANSI A156.13 makes distinctions between Grade 1 Operational and Grade 1 Security. The section includes a distinct operational test that encompasses everything from cycling to finish testing of mortise locks. A separate listing covers security grading.
When choosing a Grade 1 mortise lock, it is important to know whether the rating given is for security, operational or both. Sometimes, the higher rating is available only as an expensive up-charge. A lock with concealed cylinder trim may be Grade 1 operational and Grade 1 security, while one with an exposed cylinder may be only Grade 2 security. One of the most difficult requirements to meet for Grade 1 security is a cylinder wrenching requirement, in which a cylinder must withstand (120 ft. lbs) of torque. Here, a weak point of many mortise lock designs is the cylinder attachment to the lock case. The screw that fits into a groove on the side of the cylinder will either bend or cut a groove in the cylinder body and allow the cylinder to be threaded out. Another security test is a 3,600 lb. pull test applied to the cylinder. A concealed cylinder cannot be accessed for these
For most other types of locks, both security and operational aspects are included under a single grade. ANSI A156.2 Series 4000 is the standard for bored-in locks and latches. While only an operational grade, it includes some considerations such as lock lever torque, vertical impact load on the knob or lever, and other destructive tests. Because the cylinder projects from the door, it is more vulnerable to attack than a mortise lock and is not really considered a security item.
Unlike some other hardware, which is available in listed and non-listed versions, most commercial locks are UL fire-listed. Most manufacturers have different latch bolt lengths available and have listed them so they can be used on both fire-rated and non-fire-rated doors. However, different products are listed with different sizes of door, depending on such variables as latch type and size. When used in a fire-rated application, each product should be checked in the UL Building Materials Directory to see what its listing actually covers.
What Type to Use?
Typical products available as Grade 1 include cylindrical key and lever locks, mortise locks, heavy-duty mortise, auxiliary deadbolts, and the locks used with electronic or other access control hardware.
For most high-traffic areas, such as schools, heavily used offices, stores or other public buildings, a Grade 1 mortise lock is preferred. Because its case is much larger than that of a cylindrical lock, it can be built to incorporate parts with thicker cross-sections and greater strength.
An alternative would be a Grade 1 cylindrical key and lever lock, which is probably the most popular for retrofitting because little or no additional prep is required. For example, converting from a cylindrical knob set to a lever in order to meet ADA requirements usually entails drilling only two holes. To achieve higher security where heavy use or abuse is expected, combine the Grade 1 cylinder lock with an auxiliary deadbolt, providing this combination is allowed by the local building codes.
An advantage of a mortise lock in these situations is that mortise locks are available with a deadbolt as an integral part of the lock case. This combines security with ease of operation, because of dual retraction. From the inside, when the door is locked and the deadbolt is extended, simply operating the lever retracts both the latch bolt and deadbolt simultaneously. From the outside, the key will open both in sequence, retracting first the deadbolt and then the latch bolt as the key is rotated further.
The trim used with a lock should be built as strong as the rest of the lock. Lever trim, which is becoming universal because it meets ADA requirements and is easier for people to use, is also subject to a wide variety of constructions and strengths. Mortise locks typically use either forged or cast levers, both of which are quite strong.
Whatever type of lock the application requires, it is sure to be available from the wide variety of types now on the market. A suitable choice will consider the requirements for security, durability, usage demands, building codes and accessibility needs.
Popular lock functions for:
Office Entry: Keyed outside, locked or unlocked by button or T-turn inside, free exit inside
Classroom: Keyed outside, locked or unlocked by key outside, free exit inside
Storeroom: Keyed outside, always locked, temporarily unlocked by key, relocked when key removed, free exit inside.
Passage: No key. Always unlocked both sides, free exit both sides.
More functions and information see the function section of the links below: