Working Load Limits - Straps and Shackles - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Thread Tools
Old June 13th, 2007, 02:35 PM
GaryBaxter's Avatar
Status: Offline
Gary Baxter
Join Date: Jan 2007
Location: York, ME
Posts: 1,003
Working Load Limits - Straps and Shackles

I'm looking to get some basic recovery equipment and am confused by the various strength ratings of the key components: shackles and straps. I have found some fairly inexpensive 3/4" d-shackles with a WLL of 14,000 lbs. I don't know whether to get a 3" wide recovery strap with a tensile strength of 27,000 lbs and a breaking stength of 21,600 lbs or a 2" strap with tensile of 18,000 and breaking of 14,400.

If the old adage "a chain is only as strong as its weakest link" is true and the d-shackle WLL is 14,000 lbs, is there any reason to get the stronger 3" strap? Am I correct in equating the working load limit of the shackle to the tensile or braking strength of the strap?
Reply With Quote
Sponsored Links
Old June 13th, 2007, 02:59 PM
Status: Offline
1995 D-90 SW #351
Join Date: May 2006
Location: Portland, Oregon
Posts: 115
Hi Gary,

The working load limit is normally 6 times less then the actualy breaking strength. Th 3/4 inch shackle I use for winching is rated 9500 lb working load, and 57,000 lbs ultimate yield. The working laod has the 6 to 1 safety factor built in for lifting (hoisting) applications where regulations have high safty requirements.

From personal experience, I would use the 3 inch strap with a 4500 lb rig. A hard snatch pull on a 2 inch will snap it in two.
Reply With Quote
Old June 13th, 2007, 03:50 PM
jimmy salmon's Avatar
jimmy salmon
Status: Offline
jimmy salmon
94 D90 AA Yellow
Join Date: Jun 2004
Location: Methuen MA USA
Posts: 1,342
get a kinetic strap,
3rd low and BOOT IT

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 04:57 AM.