Heavy Duty 9800 psi and light duty 7000psi Synthetic Web Slings
Yellow Polyester tuff tag
All our lifting slings and lifting straps are made of highly
durable, heavy-duty polyester webbing. These lifting slings
(sometimes called lifting straps) are in stock in numerous widths
and lengths. Slings come in various styles: flat eye and eye,
twisted eye, endless, and endless round to meet your specific
These lifting slings meet or exceed all WSTDA standards and OSHA
We manufacture our lifting slings and straps and can quickly custom
build whatever type of lifting sling your need.
All lifting straps manufactured or provided by NANJING DAHUA meet
or exceed all OSHA regulations as well as WSTDA standards.
Polyester web slings are used primarily in conditions where acid is
present or a minimum stretch is desired. Polyester is unaffected by
common acids and hot bleaching agents, but the material is
unsuitable for use in conditions where concentrated sulfuric acid
and alkaline is present.
Polyester is also unsuitable in locations where temperatures exceed
194° F (90° C).
Stretch of a polyester web sling at rated capacity is approximately
*****Grade of Webbing****
- 9 (9800 psi - Heavy Duty)
- 7 (7000 psi - Light Duty)
Synthetic web slings come in a variety of different types in order
to better serve a particular purpose. Multiple sling configurations
allow a user to find a sling that is most adaptable to the
application for which the sling is used. Stren-Flex® follows a
standard numbering system and terminology, and our representatives
can help you find the right sling configurations to fit your needs.
Type 1 Triangle-Choker
Type 1 is a versatile sling type that has steel end fittings to
allow the sling to be easily used in basket or choker
configuration. These fittings also reduce wear and allow easier
connection to most hoist hooks. Basket capacities from 4800 to
67,000 pounds. Web widths are from 2-12 inches.
Type 2 Triangle-Triangle
Type 2 slings are the same as Type 1 except each end has the
identical triangle. This sling is used only on vertical and basket
configurations. Basket rated capacities are identical to Type 1
Type 3 Eye & Eye Flat
Type 3, also known as eye & eye flat slings, are very popular
slings which are stocked in multiple capacities. Eye & Eye
slings are very adaptable and are a good choice in many lifting
situations. The flat eye is usually easier to remove or insert into
limited spaces. Basket capacities from 2400 to 132,000 pounds and
web widths from 1-12 inches are available.
Type 4 Eye & Eye Twist
Type 4 eye & eye twist slings are identical to the Type 3
slings except the eye of a Type 4 is twisted to stand open. Eye and
Eye twist slings are recommended if the sling is to be used in a
choker hitch. Basket capacities and web widths correspond with Type
Type 5 Endless
Type 4 endless slings are versatile and used for general purposes.
The slings can be rigged in an unlimited amount of ways, and they
can be readily adjusted to compensate for wear. Endless slings are
popular and easy to use. Basket capacities from 4800 to 107,400
pounds and web widths from 1 to 12 inches are available.
Type 6 Reverse Eye
Type 6 reverse eye slings are heavy duty slings that have an eye
and body covered with wear pads. Eyes stand open at 90° to the
sling body allowing easy choker or basket hitches. Stren-Flex®
manufactures Type 6 slings with basket capacities ranging from 7200
to 70,000 pounds and web widths which vary from 2 through 6 inches.
Type 7 Flat Eye
Type 7 slings are a variation of Type 6 slings with a flat eye in
comparison to the reverse eye of a Type 6 sling.
Type 8 Wide Body Heavy Duty Basket
Type 8 slings are used in basket hitches where a wide heavy duty
sling is required for load stability and for proper handling of
fragile or finished surfaces. Type 8 slings are for basket hitch
only with capacities ranging from 19,200 to 108,000 pounds
available in web widths from 6 to 24 inches.
Type 9 Light Duty Cargo Basket
Type 9 cargo slings are used in basket hitches to provide a large
surface area for load stability and protection for finished or
fragile surfaces.. The eyes of a cargo basket sling are small and
can easily accommodate small hoist hooks.
After identifying the material type, the next consideration must be
the rated lifting capacity required. Remember that the rated
lifting capacity of the sling must often be greater than the weight
of the load to be lifted. Because the angle of pull on the leg of a
sling varies with the leg angle, forces may be exerted on a sling
greater than the user may expect.
To calculate the load on a particular sling leg proceed as follows
or use our load calculator:
- Take the total weight of the load and divide this by the number of
legs supporting the load. For example, assume a 2000 pound load is
to be supported by 2 legs of a sling. The above will give a total
minimum weight on each leg of the sling of 2000 pounds divided by 2
legs or 1000 pounds.
- Determine the load factor by observing the load factor chart. Ex.
Assume that the leg angle will be 60°. The load factor for 60° from
the load factor chart is 1.154.
- Multiply the load factor times the minimum weight to be supported
by the leg, i.e. 1000 pounds times 1.154=1154 pounds. The rated
sling capacity needed is then 2308 (1154x2) pounds in basket
capacity to safely lift the 2000 pound load.