Grade 70 Transport Chain
Grade 70 Transport Chain
Transport chains are high strength chains used in applications where much strength is needed yet the task served is rather straightforward. Sometimes referred to as grade 70 binder chain, cargo chain, high-tensile chain, or trucking chain, this heavy-duty chain is designed for tie down applications. Grade 70 chain is never to be used for overhead lifting.
How is Chain Grade Measured?
Chain grades are specified by the NACM (National Association of Chain Manufacturers) and the ASTM (American Society for Testing and Materials) standards that define the dimensional, mechanical, and compositional requirements that determine the proof of the steel, minimum breaking force required, elongation, etc. The combination of these measures determines the working load limit that each heavy duty chain can handle before risk of breakage. These factors are tested in a laboratory setting to ensure chain load capacity.
Grade 43 chain, also known as High Test Chain, is a mid-grade cargo chain with a working load limit of 5,400 lbs for 1/2″ chain. Grade 30 Chain，also called proof coil chain，is a light to medium duty chain，Grade 70, referred to as Transport Chain, is top level of heavy chain with a working load limit as high as 11,300 lbs of cargo for 1/2″ chain. Chain suppliers are required to clearly mark 5/16” and 3/8” chain links with their grade within 1 foot intervals along the truck chains, and within 3 foot intervals for ½” chain. This is to ensure easy identification and promote safety. It is very important to use the right heavy duty chain for the load you are transporting and these rules are D.O.T. enforced.
When to use Grade 70 Chain
When you need heavy chain to secure large loads grade 70 chain is the best choice. With the most efficient weight-to-strength ratio that comes from drop forging and heat treating, this truck chain allows you peace of mind that your load will be secured in place against sudden stops or tight turns where another transport chain could fail. Grade 70 chain and grade 70 chain hooks can be easily identified by their yellow zinc chromate finish and either 7, 70, or 700 embossed into the surface. Grade 70 chain strength is mandatory for auto transport chains, flatbed chains, heavy equipment chains, tractor tie downs, and log transport chains.
Hooks for Transport Chain
There are three common types of hooks used for grade 70 transport chain.
- Clevis Grab Hook A shallow throat opening allows for easy and secure connections.
- Clevis Slip Hook Also referred to as a sling hook, is durable and features a wider throat than the clevis grab hooks.These hooks can be attached easily to chains, and allow more versatility within your tie down assembly.
- Clevis Slip Hook with Safety Latch Features a wider throat than a clevis grab hook; designed with a safety latch over the wide throat of the hook to ensure the chain is held in place.
Grade 70 transport chain can be used as logging chain, however standard log chains rate at grade 43. Grade 70 chain is designed for tie-down use only, but will work for any logging operation. High test log chains are typically used for securement, binding, construction, logging, and agriculture, and our grade 70 transport chain is suitable for all of the above.
A short section of chain attached to the end of certain tie-down straps. These extensions include an eye grab hook on the end.