Types of Door Latches
Latches are made of various materials and thicknesses, finishes and sizes to meet specific engineering requirements. Engineers can choose a galvanized lock to prevent corrosion and ensure long-lasting durability in harsh environments.
Other specifications include the degree of security required for the application. For example the hook lock latch is more secure than a hasp, and might require the use a padlock.
Hook and Eye Latch
The hook and eye latch is a simple way to lock gates doors, windows, cabinets and sheds. It's also ideal to secure screens, porches and storm panels. There are no fancy tools required and hooks can be screwed in by hand within a matter of minutes. The sharp screw points pierce into wood easily and efficiently to increase security and stability.
To determine the proper hook size, first determine the type of hook. Crosby Group(c) Find the type of hook and size embossed near the eye or the clevis on the hook. The size in inches is on one side and the size in millimeters is on the other. The clevis grabber hook features an clevis that can be attached directly to chain, whereas the eye rigging comes with a large, angled eye to use with synthetics or wire rope. Pewag(c) Hook type, size in mm and the grade of alloy is embossed on the lower portion of the hook bowl. CMCO Columbus McKinnon(c): Look for "HA 800" or HA 800-1000" and the hook size embossed on the lower portion of the bowl close to the clevis.
Laclede(c), markets the Cartec chainhook. It's easy to spot as it has a raised "Cartec" embossed near the bottom of the bowl and is safety orange or red. Gunnebo(c) and CMCO Columbus McKinnon both have their names embossed on the lower portion of the hook bowl. In addition, Gunnebo has a swivel hook, which is identified by an "ELD" mark halfway into the bowl of the hook. The hook is equipped with a large eye that can spread round and web slings.
Clevis Latch
A clevis latch permits users to secure the hook of a clevis to an anchor point, and it also helps prevent the hook from falling loose during a load transfer. Clevis latches are available in a variety of designs including those with spring-loaded handles and those with a safety lock. The latter is ideal for slip hooks since they ensure that the load doesn't fall off the hook unless an inward force is applied. This makes slip hooks with clevis compatible with ASME B30.9 Slings standards and OSHA regulations.
A standard clevis lock is an clevis pin that has tang at one end, and a head that is formed at the other. hook lock for van , usually made of steel to provide strength for the latch they are usually coated with zinc, silver or chromium. To prevent corrosion, they're often coated with chrome, zinc, or silver. They can be hardened.
These latches are used in a variety of ways which range from connecting chains and rigging equipment to secure cargo in pickup trucks and on trailers. They can also be employed for heavy-duty applications, like securing cranes and machinery.
Certain clevises are constructed of machined pieces, while others have folded pieces that have been molded into them. They have a base with a hole, whether threaded or unthreaded. They can be welded to other parts using a bolt for clevis.
The clevis pin is usually threaded, and it can fit into a hole that's either smooth or slotted. The pin has a larger diameter than bolts, and it's designed to support large shearing stresses and can support an axial load.
Certain clevis locks are made of hardened so they can withstand the vibrations and stress of harsh environments. Some are designed for overhead lifting. This means they can support more weight than non-hardened models. A hardened latch may also be plated in a variety metals, including silver or nickel to improve its corrosion resistance. Paint or powder coatings can be used to improve their appearance and give them colour.
Self-closing Lock
The locking mechanisms of latches can be as simple or intricate as the overall design. Often, the latches are constructed from metals to ensure durability and strength. Powder-coated or painted latches can also enhance their appearance. Regardless of the materials used in their manufacture, latches must be capable of enduring being bent, sheared, and the forces of impact. The thickness of the latch's barrels, backing plates, and cams is a key factor when categorizing them as light, medium or heavy-duty.
The kind of latch you choose must be based on your security needs and the kind of enclosure or door it will be connected to. For example, a lightweight garden gate can be secured by a hook latch, while the door to a shed that is strong requires a padlock and a hasp combination.
If you are using a self-closing latch or no the most important thing is to ensure that it is properly closed. This will reduce the chance of accidental disengagement that could lead work-site injuries. If you are not sure whether the hook is able to be loaded, look for a lock with an internal trigger or stop mechanism.
Another important consideration is the handiness. Some designs of rotary, bolt and slam latches are made to be either left-handed or right-handed. The left-handed models are typically positioned in the middle of the latch and are typically used on doors that face towards the interior of the building. The right-handed designs are positioned on the outside of the door and are employed on doors that face outward away from the inside of the building.
There are also specialized latches that can be used to get around the Adams Rite style commercial door locking latches that are found in a variety of bus and truck fleets. They are inserted through a cutout on the side of the commercial door that is adjacent to the latch and reach up inside the assembly to pull on the swing bar, which retracts the latch into the open position. These tools are available online or in the majority of hardware stores that sell Adams Rite latches.
Keyed Latch
Latches are utilized to close gates and doors. There are various types of latches. Each type has a distinct purpose. The most common door latches are hook, clevis, cam, compression and the rotary latches. Some latches include locking mechanisms, such as the keyed lock or panic bar. Metals are the most popular material for latches, but other materials can be used. They can also undergo secondary processes to improve their appearance. The most common finishes for latches are polishing, plating, paint coating, and powder coating.
Keyed latches are latch that has a cylinder and requires a specific key to unlock it. The pins and tumblers of the cylinders are aligned with the cut on the key to unlock the latch. Certain locks have additional features, such as antipick or antidrill protection.
A hasp is a latch that consists of a metal band and a staple. The staple is attached with hinges to the other end of the strap with an opening in it. Other materials such as plastic and rubber can be used to create latches, but metals tend to be more popular due their shapeability, machinability, and the strength.
Door latches are usually made from metals, however there are exceptions. For instance, some latches are crafted from plastics to reduce the weight of doors or to meet other requirements for design. Different types of latches are used for specialized applications like latches that are designed to be activated by pressing the lever or handle, enabling emergency exits for buildings and other settings.
There are two types of door latches which are levers and knobs. Levers are more popular on newer designs, while knobs are found on older designs. Some latches can be opened on both sides. This is useful for interior doors that do not have windows. A Pawl latch is a basic form of a cam latch that can be locked with one quarter-turn, or unlocked using a reverse quarter-turn. It is commonly employed in electronic enclosures, buses, trailers, RVs, and trucks.