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Strap testing Aussis style
2 years 10 months ago #234581
by rax200
Daryl
1937 RD4 4G4368
1940 D4 7J3717
1942 D4 7J9915SP
1942 R4 6G2550SP
1944 D4 2T6584SP
1945 D4 2T8978SP
1946 D4 5T6271
1956 D4 7U37855
1954 DH226 S/N 89 Howard Tug
Strap testing Aussis style was created by rax200
Hi All,
jus found this on You Tube I thought you might be interested.
regards
jus found this on You Tube I thought you might be interested.
regards
Daryl
1937 RD4 4G4368
1940 D4 7J3717
1942 D4 7J9915SP
1942 R4 6G2550SP
1944 D4 2T6584SP
1945 D4 2T8978SP
1946 D4 5T6271
1956 D4 7U37855
1954 DH226 S/N 89 Howard Tug
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2 years 10 months ago #234587
by D4Jim
ACMOC Member 27 years
D47U 1950 #10164
Cat 112 1949 #3U1457
Cat 40 Scraper #1W-5494
Replied by D4Jim on topic Strap testing Aussis style
35 years ago when tow straps were relatively new, my neighbor was killed when pulling a truck out of a ditch. Something went awry with the clevis on the end and it was propelled like a sling shot projectile through the rear of the tractor cab killing him instantly. They have been much improved since then with better knowledge on how to use them.
ACMOC Member 27 years
D47U 1950 #10164
Cat 112 1949 #3U1457
Cat 40 Scraper #1W-5494
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2 years 10 months ago #234588
by bursitis
Replied by bursitis on topic Strap testing Aussis style
i was about 8 years old when i lost my best friend to a snapped log chain while pulling a combine out of the mud. i remember several neighbors being injured or killed back in the 1970's when those nylon stretch ropes first came out. usually by a small log chain attached to the end of the rope or a small clevis.
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2 years 10 months ago - 2 years 10 months ago #234590
by gauntjoh
John Gaunt, ACMOC Director, UK
Replied by gauntjoh on topic Strap testing Aussis style
The early straps must have been elastic unlike the ones in the video, resulting in the accidents mentioned.
I have seen “kinetic” ropes used to pull 4x4s out when stuck. The pulling 4x4 “goes like “hell” stretching the rope which builds up enought kinetic energy to pull out the stuck vehicle. They have to be very careful that the towing points are securely fixed to the vehicles otherwise fatal results can ensue as described above. The straps in the video hardly seemed to stretch at all before failing, probably the type of plastic used to make them or the type of construction or both.
I have seen “kinetic” ropes used to pull 4x4s out when stuck. The pulling 4x4 “goes like “hell” stretching the rope which builds up enought kinetic energy to pull out the stuck vehicle. They have to be very careful that the towing points are securely fixed to the vehicles otherwise fatal results can ensue as described above. The straps in the video hardly seemed to stretch at all before failing, probably the type of plastic used to make them or the type of construction or both.
John Gaunt, ACMOC Director, UK
Last edit: 2 years 10 months ago by gauntjoh.
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2 years 10 months ago #234594
by dpendzic
D2, D3, D4, D6, 941B, Cat 15
Hancock Ma and Moriches NY
Replied by dpendzic on topic Strap testing Aussis style
we still use that technique nowadays to pull out stuck 4x4's and campers on the beach in soft sand---usually a 1/2" nylon rope
D2, D3, D4, D6, 941B, Cat 15
Hancock Ma and Moriches NY
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2 years 10 months ago #234596
by Deas Plant.
You have a wonderful day. Best wishes. Deas Plant.
Replied by Deas Plant. on topic Strap testing Aussis style
Hi, Folks.
I'm not very surprised that they had to get down to 3 straps before they managed to tear them up. I suspect that there might be a pretty fair 'safety factor' in the load ratings for those straps, especially as they are normally used for lifting loads with cranes. I don't know for sure but I would not be surprised if there was a 100% 'failsafe' factor in those ratings.
Just my 0.02.
I'm not very surprised that they had to get down to 3 straps before they managed to tear them up. I suspect that there might be a pretty fair 'safety factor' in the load ratings for those straps, especially as they are normally used for lifting loads with cranes. I don't know for sure but I would not be surprised if there was a 100% 'failsafe' factor in those ratings.
Just my 0.02.
You have a wonderful day. Best wishes. Deas Plant.
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2 years 10 months ago #234598
by D4Jim
ACMOC Member 27 years
D47U 1950 #10164
Cat 112 1949 #3U1457
Cat 40 Scraper #1W-5494
Replied by D4Jim on topic Strap testing Aussis style
The safety factor for slings is nominally 5 and it goes up depending on the angle of the sling. Don't know what the SF would be for non hanging loads but I would guess it is at least 3.
ACMOC Member 27 years
D47U 1950 #10164
Cat 112 1949 #3U1457
Cat 40 Scraper #1W-5494
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2 years 10 months ago - 2 years 10 months ago #234602
by rax200
Daryl
1937 RD4 4G4368
1940 D4 7J3717
1942 D4 7J9915SP
1942 R4 6G2550SP
1944 D4 2T6584SP
1945 D4 2T8978SP
1946 D4 5T6271
1956 D4 7U37855
1954 DH226 S/N 89 Howard Tug
Replied by rax200 on topic Strap testing Aussis style
Hi All,
Here is the saftey factors for straight and round slings
Synthetic Sling WLL Guide
Resources » Working Load Limit Guides » Synthetic Sling WLL Guide
Flat Webbing Slings
Australian Standard AS 1353 - 1997, Safety Factor 8:1
Round Slings
Australian Standard AS 4497 - 2018, Safety Factor 7:1
Maximum Working Load Limit (WLL) in tonnes
Features:
Sling colour as per Australian Standards.
All slings are made from 100% polyester.
WLL is clearly marked on each sling.
Note: Protective sleeves are recommended for lifting sharp and rough edges
This was taken from Lifting Victoria web site there is also a chart, here is the link
liftingvictoria.com.au/resources/wllchar...ng-load-limit-guide/
Regards
Here is the saftey factors for straight and round slings
Synthetic Sling WLL Guide
Resources » Working Load Limit Guides » Synthetic Sling WLL Guide
Flat Webbing Slings
Australian Standard AS 1353 - 1997, Safety Factor 8:1
Round Slings
Australian Standard AS 4497 - 2018, Safety Factor 7:1
Maximum Working Load Limit (WLL) in tonnes
Features:
Sling colour as per Australian Standards.
All slings are made from 100% polyester.
WLL is clearly marked on each sling.
Note: Protective sleeves are recommended for lifting sharp and rough edges
This was taken from Lifting Victoria web site there is also a chart, here is the link
liftingvictoria.com.au/resources/wllchar...ng-load-limit-guide/
Regards
Daryl
1937 RD4 4G4368
1940 D4 7J3717
1942 D4 7J9915SP
1942 R4 6G2550SP
1944 D4 2T6584SP
1945 D4 2T8978SP
1946 D4 5T6271
1956 D4 7U37855
1954 DH226 S/N 89 Howard Tug
Last edit: 2 years 10 months ago by rax200. Reason: Add web site
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