Types of Door Latches
Latches are available in various materials, finishes, and thicknesses in accordance with the engineering requirements. For instance, engineers may select a galvanized latch to prevent corrosion and preserve durability in harsh environments.
Other specifications include the level of security required for the application. A hook lock latch for instance is more secure than hasps, and may require padlocks.
Hook and Eye Latch
The hook and eye latches can be easily installed to secure windows, gates, cabinets, and sheds. It's also great for securing storm panels, porches and screens. There aren't any fancy tools needed and the hook can be screwed in manually in minutes. The screw points are sharp and can be sunk into wood quickly and easily to provide security and stability.
To determine the proper hook size, first identify the hook type. Crosby Group (c): Take a look near the eye or the clevis for the embossed hook type and size. The size is shown on both sides. The clevis grab hook features the clevis to attach directly to chains, whereas the eye rigging hook features a large eye designed for use with synthetic rope or wire rope. Pewag(c) is the hook type size (in mm) and grade of alloy are engraved in the lower portion of the bowl of the hook. CMCO Columbus McKinnon (c): Look at the "HA 800" or "HA 800-1000" as well as the hook size on the lower portion of the bowl, near the clevis.
Laclede(c) is the brand that markets the Cartec chainhook. It's easy to spot as it has a raised "Cartec" embossed near the bottom of the bowl and is either safety orange or red. Gunnebo(c) and CMCO Columbus McKinnon both have their names embossed on the lower part of the hook bowl. Gunnebo also has a swivel sling hook, which is identified by an "ELD" halfway up the bowl. The hook has a large eye that can spread webs and round slings.
Clevis Latch
A clevis latch enables the user to connect a clevis hook to an anchor point and also prevents the hook from slipping loose during loading transfer. Clevis latches come in many different styles, like ones with spring-loaded handles or those equipped with safety locks. This is ideal for slip hooks since they guarantee that the load doesn't fall off the hook unless an inward force is applied. This feature makes clevis slip hooks compatible with ASME B30.9 Slings Standards and OSHA Regulations.
A typical clevis latch comes with an clevis pin and tang on one side and a formed head on the other. hook lock for van are usually constructed from steel to give the latch with strength they are usually coated with zinc, silver or chrome. They're usually plated with zinc, silver, or chromium, to resist corrosion. They can be hardened.
These latches are suitable for diverse purposes including connecting chains to rigging equipment to secure loads in trailers and pickup trucks. They're also employed for heavy-duty applications, such as securing cranes and machinery.
Certain clevises are constructed of machines, while others have folded pieces that have been molded into them. They are built with a base that has a hole, whether threaded or not. They can be connected to other components with a bolt for clevis.
The clevis pin can be threaded and fitted into a smooth or slotted hole. The pin is larger than a bolt and is designed to withstand massive shearing forces as well as an axial load.
Many clevis latches have been hardened to withstand the strain and vibration of use in harsh environments. Some are even rated for overhead lifting, meaning they can support a larger amount of weight than the non-hardened versions. In addition the latch can be coated with a variety of metals including silver, nickel, and chromium, to increase its resistance to corrosion. Powder coating or painting can be used to enhance their appearance and give them colour.
Self-Closing Lock
The latch's locking mechanisms can be as simple or complex as the overall design. Most often, these devices are made of metals to ensure durability and strength. They can also be powder coated or painted to enhance the appearance of the latch. No matter the material used in their manufacture, latches must be capable of enduring bending, shearing, and the forces of impact. The thickness of the barrels, backing plates and cams play a major role in determining if they're light-, medium-, or heavy duty.
It is important to select the latch depending on your security needs and the type of enclosure or door that you will be attaching it to. A gate for the garden that is lightweight is an example. It can be secured with hook latches. However, a strong shed requires the combination of a padlock and a hasp.
If you have a self-closing latch or not the most important factor is to ensure that it is closed properly. This will reduce the chance of accidental disengagement that could cause workplace accidents. If you are not sure if the hook is ready to be loaded, search for a lock that has an internal stop mechanism or trigger.
Another factor to consider is hands. Certain designs of rotary, bolt and slam latches are made to be either left-handed or right-handed. Left-handed latches are generally placed in the center of the latch on doors that are facing towards the interior. The right-handed models are put on the outside of doors and are used for doors that face away from the interior.
There are also specialized tools that bypass the Adams Rite style commercial door locking latches found on many trucks and bus. These tools are inserted through a cutout on the side of the commercial door adjacent to the latch. They then reach up within the assembly to pull on an adjustable bar that will retract the latch back into the open position. These tools are available online or at many hardware stores that stock Adams Rite latches.
Keyed Latch
Latches are used for closing doors and gates. There are numerous kinds of latches, and each type serves a specific function. Common door latches include hook, clevis, cam, compression, and the rotary latches. Some latches also include locking mechanisms, like the keyed lock or panic bar. Latches can be crafted from different materials, with metals being the most popular. They can also undergo secondary processes to enhance their appearance. Common finishes for latches include polishing, plating, paint coating, and powder coating.
Keyed latches are made of an cylinder that requires an unlocking key. Cylinders contain pins and tumblers that align with the cuts in a key to unlock the latch. Some locks have extra features, such as anti-pick or antidrill protection.
A hasp is a type of latch that consists of a metal band and a staple. The staple is attached using hinges to the other end of the strap that has slots inside it. Other materials such as plastic and rubber can be utilized to create latches but metals tend to be preferred due to their ability to form, machinability and durability.
Metal is the most common material for door latches, however, there are a few exceptions. Some latches, for instance, are made of plastic to reduce the weight or to meet other design specifications. Some latches are designed for specific purposes for instance, latches that are that are activated by a lever or handle. This allows emergency exits in building and other areas.
There are two main types of door latches which are levers and knobs. Levers are more popular on modern designs, while knobs are more common on older models. Some latches are reversible which means they can be opened from either side, which is particularly useful for interior doors where there are no windows. A Pawl latch is a basic version of a cam latch that can be locked using a quarter-turn or unlocked with a reverse quarter-turn. It is typically used on electronic enclosures and in RVs, trailers, buses and trucks.